B18 idle surge. I'm having thoughts of it too.

B18 idle surge Had to restart again and kept putting my foot. Honda has a I knew it was strange since every other b18 engine I see leaves that hole empty (in the US at least). I have the B18 separate alloy intake, with the dual port exhaust manifold. When I test drove it the first time I noticed when I pressed in the clutch it would fall on it's face and almost die and the idle would surge. Most of the time it goes back to normal after about 10s, sometimes it will stay bouncing up and down for minutes though! When I turn the car off and back on the idle is normal until I touch the throttle once. Does anyone know the testing procedure? I've got a service manual and it only talks about testing the harness not the actual iac itself. warm engine runs fine with maybe a little loss of power on hills or hard acceleration, like it is running on 3 cylinders , but doesn't sound or feel like its missing. S. 5k and hang around there. There were some cases where i didn't have to hold my foot and the idling was around 1000rpm. No vacume leaks I can detect. At stops it My idle varies raising to 1750 rpm and then dropping to around 500 rpm. Join Date: Apr 2021. You do not have the required permissions to view the The surging is happening after the car is reved and then throttle released. 2000 civic with b18 obd1 motor and ecu limp mode issues If I move up to the unpainted spring it stays clossed at idle and the idle surge goes away but it won't open at low to mid boost and I get compressor surge. I was told a chipped (uberdata tuned) civic ecu would work fine View community ranking In the Top 1% of largest communities on Reddit 1000-3000rpm idle surge on b18 Sometimes around 2700 I will get a big power surge. I have a 2013 Subaru outback 2. 3 with around 226k runs great, good power tranny shifts fine no leaks at all but at idle im getting a Idle surge . Idle is a little high but nice and smooth. i said screw it and i bought an AEM EPM and the car hold rock solid timing and idles on its own now. I static timed it to 10 degrees BTDC, and the engine started right up. Before the intake heatshield gasket and coolant bypass, the intake manifold temp at idle was around 130F and approx. IACV, TPS, or the 3rd valve It is caused by the idle poppet being set at too low of a crack pressureit gets worse when people try to increase the idle RPM as a remedy. 3, decent sized street cam, no AFM, head/exhaust work, 6. I had tried to figure the IAT speed to no avail. Is this normal The idle will the surge again and engine usually dies. Posted by u/Lumine221 - 1 vote and 3 comments What causes a surging idle speed on a Honda or Acura? Here, we’re addressing that complaint and what to look for when you run into this symptom. Save Share It runs fine except for when I lightly press the gas pedal the idle surges up and down. 6600rpm is now 131F! However, the outside temp is also cooler at 1. Crank up engine while it is warm/hot and within a few seconds put it in gear and go. Only a few hours of work so far and it's alive. This does not happen on every deceleration, but its common enough i have to be cautious when coming to a stop. Rebuild was all new seals, jets, float needles, and metering needles. There are six terminals across the plug. Jump to Latest 38K views 27 replies 8 participants last post by walker22 Aug 9, 2023. Motor is 8. per time" via PA Soft BMW scanner. 185F during 7psi boost @ approx. RaVer Motorsports Re: B18 won't idle on under 1500rpm Post by 3tc power » Sun Jul 02, 2017 6:13 am Well thanks for the help guys. I shut it off , came back aqin hour or so it starts Install Standalone electronic idle control from k-jet car, Dist od your choice, profit and profit again? Redwood Chair - Stock PSI Or Bust - Joined Mar 23, 2007 aftermarket FPR, megasquirt 2, modified 850 tps, 2L surge tank with 40 gph lift pump and a 255lph high pressure pump, -6AN EFI fuel lines, and last I checked I was all in at like $1k for everything as is now My Ody (99, 51k) developed an idle surge/fluctuation problem recently. I don't know what else to try. 2k. It only happens when water temperature reads below 50c on my Defi. Since I've owned it, it no longer wants to die When manually revving the motor, it goes to about 2700 rpm and falls on its face. 3 major causes. I've had two tuners work on my car so far, and another friend who took a look at it. Goes away after 10 seconds when the idle drops. Harry Tuttle Well-known member. It seems the computer is trying 25K subscribers in the hondacivic community. I've got one with idle surge to about 1500 rpm. M. Around the 18th minute, the water temp is close to the middle point and reading around 88c on the Hondata. On an engine with sequential injection, this is simple enough – get the engine idling at 14. 2ms injector pulse width normal at idle and correct? I have a 2000 4. I've tried adjusting the IAC to no avail. 1. So after driving it almost 5000 miles, it throws the same code again. If the rpm drops below the idle speed and then recovers, then move the slider to the right. Car seems to rev fine with the map I have , just the idle that I can't seem to get. I’m kinda new to these motors but I’m just wondering if it could be something else Hi all I am a newbie to this website and I drive a 99 ek9 in vsm silver:nice: just recently I have had a b18c-r engine and box from a 98 teg put in running on a harness and standard b18 ecu. If I'm quick enough I can stop it with a throttle blip and then I'm good. mycumminsmokes Discussion starter. Batch fire Idle surge I have a 2001 c5 corvette with a ls3 tsp f35 cam headers corsa exhaust and varraram intake the issue I am have is sometimes rolling to a stop I get idle surge when I come to a complete stop it idles fine also if it starts doing it I can turn car off and back on and it will go away for a bit I checked for vacuum leaks did compression test cleaned Tb replaced I started with an overly rich map and am trying to get it to idle well. k. It is swapped with e38 ecu and does not currently have ac signal going through the ecu due to complications of getting ac control to go through e38. In the morning when I start the car it seems like the choke went bad or something. It surges when the IAC goes to O, in surges when the IAC never goes below 20. 6500 rpm. 3k to ~2. It was having surging idle but that seemed to go away and it when you start it up it surges from idle to abou 2500 or 2000 or so then back and keeps doing this. Any body please explain what causing this? Cel is throwing a code 14. After a re-run through the Idle Re-learn process (which was suddenly A LOT easier to do - I could actually keep the RPMS at 3k this time), and driving it down the freeway a ways, to give it Can a Bad Idle Air Control Valve Cause Issues with a Key Fob Battery? Yes, a bad idle air control valve can cause issues with a key fob battery. 2k and 1. Sometimes around 2700 I will get a big power surge. Sometimes the RPMs will stay above 3k and stay there until you hit the 12-14" of idle vacuum on horrible/minimally potent CA gas with the low compression F head sounds pretty believablepasses emissions nicely/closer to all alcohol though, but octane & energy density, not so much heh. I have been having this problem with the surging idle etc. I recently rebuilt the entire b18. that is the most frequent cause. Idle Air Control Valve is to adjust the idle 4: You can increase PW at idle while and improve idle quality by switching from Sequential, 2 squirt, alternating to Sequential,1 squirt simultaneous. I read on the board that the valve can be replaced DIY so I took a chance and did the job myself. Literally, not a single issue prior. Ocv duty is fine on all 4 corners. Still has factory converter, Surge at idle. No engine lights are on. Bit the idle when warm is around 1250-1500 ticking over and when pulling away and coasting etc the idle can climb to 2. I am running a mtxl After scratching my head over this, and consulting a couple of more knowledgable friends, I went ahead and replaced the IACV - now there's no more surging idle problems. Engine surging, also known as engine surge or car surge, is a common problem that affects many vehicles. Inspect the electrical connector for corrosion or damage also. Sluggish acceleration. Joined Feb 14, 2011 Messages 7,357 Reaction score 5 well my ka24de's idle is surging up and down from about 1,000 to 2,500 and feels like it lacks a little power. Solution: Bad IPR valve (injection pressure regulator valve) Now that I understand what the ICP and IPR do, it all makes perfect sense, but at the time, it was very frustrating. Reasons why you should take it apart and clean it:-High idle after your car warms up-Lumpy idle-Roaming idle-Hunting idle-Fluctuating idle Tools C6 Scan & Tune - Idel surge/Hunting - I recently purchased a 2005 M6 with about 29k on it with LT Headers and a Corsa catback. Went thru the entire process yesterday , was able to adjust the TPS to . The engine will high idle for 15 seconds then go to a low idle, then surge. Shop Owned my 944 for roughly 4 months and occasionally the engine begins to surge at idle. My mate has just rebuilt his jdm b18c 98spec with: Brian crower stage 3 cams Brian crower dual springs and titanium retainers Weisco hi comp pistons Think the block was bored to 81. Last photo is of spark plug no. . McVilllain Discussion starter. 5i notice when it's hot outside and I stop to wait for the garage door to open or when I put the car in park in a parking spot or to unload the car from getting groceries for my family. It gets really jerky because when I'm In this video ill be showing you one way to fix the amazing honda idleing problem. Putting the trans in drive will solve the problem. Check your TPS sensor voltage, it should be right about . More shudder/ heavier vibration at idle (which goes away when it's put in park) 2). 1 of 3 Go to page. a. I can not get this thing to run right, idle pulse width's seem high to me from what I have read. So far we've fixed multiple CEL, including IAT, MAT, Fast Idle Valve, heated oxygen sensor and IACV. Took to the dealer and changed EGR which did not solve the problem. No one has managed to solve the issue so far. Steve M Active The function of the IACV a. I hope this helps someone going through the I'm planning on doing a high compression build on my B18 over the winter, aiming to keep it as a road engine mainly, with some trackdays thrown in too. I've seen a lot online about testing the round iac motors but little to none on testing the Expo and Galant sohc brick type iac. The manager wanted to change the IAC valve and asked $300 for the replacement. 2 posts · Joined 2024 Add to quote; Only show this user #1 · Sep 6, 2024 (Edited) EDIT: I think I just discovered my issue hopefully, very slow leak coming from the coolant hoses, which are new. What am. View Profile View Forum Posts Private Message Senior Tuner Join Idle Surge, High Idle After Replacing IACV. I had noticed thoe, the surge occurs when the duty cycle on the s300 goes to -0- then back up. High idle after cranking when the engine is warm. N. But one time it did almost kill me because I was turning into my driveway and she cut off, then my steering wheel locked up and 16 votes, 10 comments. Not really at idle, but while driving. 1; 2; 3; Next. I have a FBO E85 SS 1LE My car on idle sounds 97 f250 7. This was just after I got it running after the install. Thank you for any help on what Engines don’t like to idle lean; a lean air/fuel ratio is one of the biggest causes of a surging idle. It feels like it's a bit out of control and doesn't feel safe really. 1 post • Page 1 of 1. 69824 miles. I'm completely clueless what's wrong and really need some help. Around the 6th minute, things got better. 7 final drive gear box Jasma stampd 4-2-1 mani B18 timing. I've attached a log from earlier today. The surging stops once the water temp stabilizes. Meaning no air is entering around the throttle plate as a) the surging can happen if you screwed up your map a lot, the engine revs up, then meets a load vs too lean/rich that cannot sustain the engine speed, and drop back to the Few things, its a '91 Crx Hf, its a b18a block, b18b head, b16 S1 tranny, running Obd0. Post by mvmbg » 30 May 2011, 02:53. Customer: I have 2015 freightliner DD13 that is surging at idle. Start the car with all lights, A/C, Radio, everything electric off. Willieyerian Discussion starter. Fan kicks in just cold start would idle at 3k rpm then once warm, it would dance from 1k rpm up to 3k rpm then back down to 1k rpm. 0l bbc with brodix race Finally got the thing started today, but its running really bad. After the mods, idle temp is now 106F, cruise temp at 4000 rpm in third gear is 119F, and 7psi boost @ approx. From which I ve already replace and r Hello all, I'm in need of some help. That may bring the 4. . It revs high and low high and low until the car warms up. The car seems to have decent power, but this surge messes with my shifting. The outside temp was around 75F. The car then started idling roughly when stopped, surging between 600-900 rpms randomly and often, but not something I could intentionally recreate. i have had weird results of compression This what happens when I rev to 1 and a half rpm. The car had an aftermarket TB. Eventual transmission problems. if the oscillating idle stops you need a new cold idle-up valve. Not sure why an exhaust leak would cause a surging/bucking like feel under acceleration. I did a simplified version when my Element was idling at 1500, revving/surging and throwing idle air control code. I was told a chipped (uberdata tuned) civic ecu would work fine in an LS but that obviously wasn't th Gain an extra 15-20 hp and retain your factory idle and low-speed emissions with Skunk2’s Tuner Series Stage 2 Camshafts, our introductory line of high-performance camshafts for Honda’s B16/ B17/ B18 VTEC engines. Scenario, parking lot, first gear, just above idle in the 1200 rpm range. Any Forum thoughts It tends to buck and jump between 1200-2200 RPMs. Fresh fuel filters, T&D left a Super Bowl party and truck was very hesitant, and seemed to surge. Whether you need advice or want to show off your ride, this is Then around 2:45-3:00 minute the idle fluctuates to 500rpm and died. I did the swap, etc. Lately the surging has been occuring more frequently, while also dipping way further down to the point the car shuts off entirely if the car goes into idle. What am I looking at? No codes. At idle the RPM's bounce up and down +- 500 rpm, but not for long. Posts: 32 18 SS 1LE RPM Surges on Idle and out of gear. Recently went from a williams 102 TB to a 103TB and now have a noticeable idle surge with car in gear that jumps about 300 rpm. I can get it close , it will start idle high, then come dowm a bit then surge than try to catch up, then surge again. 3 idle surge? Tags 7. Its running on a P28 chipped and set up to run my B18c4. W. Jump to Latest 623 views 11 replies 2 participants last post by 24vonafarm 21h ago. Set it back and it just got worse🤣🤣 now its really bad. Warming up nicely, starting to get a little excited. Car performs better when gas is punched. You still here? If the carb mixture/idle screws are set too lean the car may still ping under load. Location: Mexico. *Very* intermittent soft "surging" and hesitation when shifting. edcmat-l1. Now I can make 2018 rough idle/ surge under acceleration. Took lots of searching and managed to find it still bolted to the head amongst a pile of Making a new thread as been trying to work out idle surge on my 97 burban. It only returns to normal idle speed when it comes to a complete stop. I don't have a spare afr gauge or I would hook up to it. Especially at low speeds and when coming to a stop. My 2018 wrx started to surge after I messed with the idle speed. I can get an ohm My idle surge is so bad that sometimes when I'm making very tight turns at a slow speed, and in neutral or with clutch in, the engine will just die. If I start the car and don't touch anything until it's fully warm there aren't any View community ranking In the Top 1% of largest communities on Reddit 1000-3000rpm idle surge on b18 Description of problem: The car "surges". Can't help but wonder it's a coincidence but figured I'd share for any future lurkers. Past that it's fine. I've reset the pcm and everything to no evail. If the valve fails, it can make the engine idle too low, causing the battery to drain more quickly. I?m fairly new to tuning and having trouble figuring out how to fix. The second most common cause of an engine surge would be a faulty fuel pump actuator, part number(###) ###-####X. started her up for the first time, fired right up, let it idle for a As soon as I chipped and installed my LS ECU it idled perfectly. So with the killer b hard inlet you don’t use the one hose that would go to the back of the inlet where the OEM blow by sensor would be I’ve seen some people plum it back in, or just cap and tape it off like I did. The idle surges from 800-900rpm it almost sounds like a fake cam tune or something. 2014 5. hey guys, i finally put in my b18 Ls swap today. Hey guys, the idle on my 2001 7th gen Civic (D16) is surging up and down on warm engine between 1. clean your iacv, adjust tps. Runs like a hot cam lobe. It will just start missing pretty badly randomly. It’s prone mostly to V8s that are force-fed with a large Roots-style supercharger. In summary, it all went well. In park (or neutral, but no Starting my 04' E46 BMW 316ti Compact N42 B18, checking battery voltage and having Error code "272C/E1 LR-adaptation add. The Questions relating to the 90-93 Integra. Put it back into Park. Besides the TPS all wierd honda idle issues come from the ECU trying to make the engine idle at a speed that it cant achieve. Also, just curious, can anyone please comment on whether the "Idle Learn Procedure" is the same as resetting the Once ECT hits ~45c (based on FP log), idle will surge from ~1. valves won't throw your idle off, idle is probably idle air control valve (needs cleaned or replace) you can also see if you can find a leak down tester, kinda like compression but puts air into the cylinder and you can figure out if it is the valves or rings. I'm having thoughts of it too. then it stabilizes and is smooth (with an induction tach on the plug wire - it reads 780 rpm). Tuner Series Stage 2 Camshafts are designed to By definition, blower surge is a rhythmic acceleration and deceleration of engine speed at idle. It'll just bog out and sputter to a stop. i take the wire off of the iacv on the back of the intake and it goes away When i blocked of the port in the TB that feeds the IACV and idle screw the car dies. Page 1 of 2: 1: 2 > Thread Tools: 04-26-2021, 03:15 PM #1: 4thCamaro Drives: Chevy Camaro 18’ SS 1LE. Jump to Latest 874 views 4 replies 4 participants last post by bobski Sep 9, 2024. 24vonafarm Discussion starter. If the idle poppet is set say at 3 or 4 pounds, when the idle increases, the pressure does also and opens the poppet, basically sending fuel back to the tank basically "Mechaniman" was selling a well rebuilt set of HS-6 for dirt cheap on B18 manifold. I did this after I had scheduled maintenance that replaced spark plugs and they apparently didn't perform a reset. Won't idle, sounds like its misfiring and smells very rich. I can drive like 30 to 40 feet then the engine starts to buck and surge, I can clutch in, then once calmed down drive another 30 to 40 feet where it starts it again. It just jumps up or down then goes back to about 500-600 rpm. Into gear and it moves forward and backwards. [email protected] Top. our introductory line of high-performance camshafts for Honda’s B16/ B17/ B18 VTEC engines. pulled the caps while it was running and Cyl 1,2,4 made ticking noise (weak arc), B18 Engine Idle and Timing setting. I have a problem with the idle surging when it's not fully warmed up. I have developed what sounds like an exhaust leak on cold start. 7:1 for gasoline, and you’re good to go. The surge continues getting worse until eventually it will stall out or I'll have to intervene. The surging will only start if there's a load on the engine from the A/C or defroster, or if I give it some gas. I'll give an example of how to make it happen. It is characterized by a sudden increase and decrease in idle engine speed, resulting in an inconsistent and So i torqued it down nice and tight and the high idle and surge stopped! The car idles at 1200 rpm and idle surges on occasion, which means i probably need to double check all of the nuts again, but the Intake manifold gasket was the culprit. etc. Subaru and the body shop agree that it's not the body shop's repair causing the problem and that something else. 98 yesterday , got rid of the code 67 , and check engine light was gone and idled smooth . Never did that before, always went to correct idle speed when put in gear, and idles fine in neutral. It idles smoothly at 700-800 now. roybelding. The first time I start and drive the car, everything is fine. If I'm on the gas the surging stops. Cyl 1,2,4 Misfire. My tach is jumping on deacceleration (sp) - very slightly - mostly in the (2) lowest gears. 42 posts · Joined 2010 Add to quote; Only show this user #1 · Nov 5, 2014. 8-4. The second and following times that I start the car, it has this idle issue When stopped in traffic or at a long light the car will rev itself up to 1500-1700 rpm and hold there for a few seconds. It will then fall back down to normal and occasionally below (500ish rpm) Symptoms: Rough idle, dropping RPM's at idle, surging at idle. Mechanic's Assistant chat. All spark plugs were black with signs of running extremely rich. If I press harder it goes away with the higher revs. Idle is relatively decent even down to 700 rpm with ac off or in gear, but in park with ac on it will surge. Jump to Latest 775 views 18 replies 4 participants last post by Willieyerian Feb 16, 2025. started her up for the first time, fired right up, let it idle for a minute and it sounded great so i shut her down and put the rest of the swap together. 1991 Mitsubishi Eclipse GSX. Idle Air Control Valve is to adjust the idle based upon the amount of air entering the engine, then the computer reacts to this information by adjusting the cars rpm. Hello, just got a 93 HB Civic with a b18b1 engine swap. 8/4l60 po1 that ran great, I then put a 228/230 585 112 cam in it with PAC 1218's, racetronix/lucas 42lb injectors, long tube headers. and replaced pretty The most likely cause of surging like this is going to be a faulty exhaust gas pressure sensor, part number(###) ###-#### The sensor is mounted in the thermostat housing. Is a 3. Does anyone know the settings for the idle and timing for a 1963 544 B18 engine? Thank you. Mysterious idle surge problem . No reply from BMW to local dealer's inquiry on this issue. Stopped by Autozone, and the guy there suggested I had weak spark. The function of the IACV a. no throttle response after idle, engine dying at idle or very low RPM's. It really only happens with the AC on when it's cranked. I did a smoke test Misfire in 3rd and 4th gear. The valve costs $100 so the labor is $200. Return to “120, 130, 140, 164, PV series, Duett, 210, 1800” Maybe sergio is onto something. So I’ve replaced my fca and my tps and I’m still getting like a buck/surge. Next Last. IDLE VALVE DUTY ADJUSTMENT: In KPRO on the parameters tab under IDLE, Alter the idle valve duty cycle adjust slider value. 11 posts · Joined 2025 Add to quote; Only show this user #1 · Feb 13, 2025. Joined Jun 2, 2006 Location - if the idle speeds up momentarily, then drops After this first cold start, the idle is rough , and seems to be rythmically surging a bit (lumping?) for about a minute or two. I replaced the iacv and iacv-air regulator with new ones. AWD · If the idle is surging then the IACV is fine, although it is possible that it may need to be cleaned out. 3. These dead key fob battery symptoms can be a sign of a larger issue with the car’s system. Surging after immediate take-off with warm engine. I had a CEL (P0505) Idle air control system. At stops it will sometimes idle smooth, sometimes idle rough. 189K subscribers in the AskMechanics community. Thread starter nathand22; Start date Oct 24, 2012; Help Support Nissan Navara Forum: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. Idle will typically be above 2100 RPMs and take 20+ seconds to drop down to 1400 2. GF1297 is the vin. Got it Rotor should be pointing to cylinder no. remember, pump pressure is controlled by RPM. 3 idle surge rpm. The interesting thing is if I remove the jumper plug so it ignores the chip it actually runs better, still doesn't idle but sounds alot But cold idle surge persists when running from a jug sure points to an air leak. got a 97 f250 7. I swear those Rocket cams idle lumpy and sound meatyyy if they're the one I'm thinking of! Don't forget injectors and fuel pump if you haven't done so already . The car is having an idle surging issue when warm. 112 posts · Joined 2021 Add to quote; Only show this user #10 · 1d ago. The car will sometimes idle surge on cold start, and sometimes stall, idle surge when moving or hitting the throttle, and sometimes stall. I have taken apart the IAC and cleaned it well, and so I hope it works. nathand22 Member. 2 intake/throttle body etc. 5mm The engine has been put together with stock cam gears and stock valve clearances to run it in before adding the I have 2015 freightliner DD13 that is surging at idle. 48v when the throttle is closed. So I was driving my Integra today to go take some pics and I go to park up and get out and the car starts surging I realized it’s idling high and it’s bouncing between 1400-1500 rpm’s. 18 SS 1LE RPM Surges on Idle and out of gear User Name: Remember Me? Password Post Reply. Just wanted to say thanks to everyone that helped me out. Today I go out and start the car from cold , idle shoots to 3 K and slowly comes down to 1500. Rev the engine to about 3000 rpm and release the throttle quickly. I'm going to swap back to the black spring, but I was wondering if anyone has figured out a way to keep it closed at idle with the softer spring. Granted, an uneven idle condition can Fluctuating Idle & surge under acceleration. 8 RPMs, sometimes even worse. Post by MEGABITEZ » Mon Mar 28, 2005 10:34 pm. the oil trick will work most of the time, check the valves first though, and the timing too. Other than deceleration, any other time this big idle surge is not there. And to be clear, pumping the primer, while running from the jug makes the surge go away? Hmmm When my OEM filter head (later replaced with an LLY unit) developed a small crack on a 15* day, I was able to finally restart and get home by using a hair dryer to warm the head and 2021 First Edition experiencing new issue with a surge in idlegoes from @950 to @1250-1400 rpm when put in 1st gear and clutch released, it just takes off without any throttle input. the intake also sucks really loud, and if i almost completely clamp the hose shut that runs from intake pipe to the iacv and iacv-air regulator shut it idles fine and the intake isn't loud. Jump to Latest If all seems well but the timing is not near 33 degrees at 3,000rpm let the car idle, loosen the dizzy just enough to turn it by hand then return to 3,000rpm and set the timing mark to about 33 degrees. 1 grounded to the valve cover. Go. Has anyone else had this issue or know what i need to change to fix? 04-29-2024 #2. Nathan DSMer for over 20 years. I went to raise it for an experiment and then it started getting wonky. This actuator is bolted to Try the Idle relearn procedure first. Same if the jets are too small for the Leaks oil out the front and rear mains, water out the pump, but it is running. Answered by roybelding in 11 hours 4 years ago. Hello, I just recently swapped an OBD1 JDM GSR B18C in my EG Civic and can not seem to figure out the issues. The mods currently on the car are: B18c-r 98spec 4. I replaced the TB and IACV with second hand I'm using the base map for the JRSC on a d16y8 in a 98 EX. A subreddit for all things Honda Civics. via YouTube Capture Here's the issue: Warm idle, in park, it will start to surge after about 30 seconds. It feels pretty down on power in the lower RPMs, and this thing has always felt pretty damn torquey to me before. Few things, its a '91 Crx Hf, its a b18a block, b18b head, b16 S1 tranny, running Obd0. I was doing some research on this and people were saying to take off IACV and clean it for any debris or so. B18? B20? B21A? B23A? One or two? I'm guessing B21A with one? Those sites are mostly OHV B18/B20, but the carb is an HIF-6 and most everything is the same. kbo yuhngk swyn hazy yaq beer gowr erwov dvv eyq dcgt zzisnf lmv brc puw