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High Idle and Black Sute Out Tail Pipe!

Discussion in 'General Tech and Maintenance' started by Accordturbo94, Mar 7, 2004.

  1. Accordturbo94

    Accordturbo94 Senior Member

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    I just need to know what could be to problem and a way to solve this: I start my car up and it revs fairly high.. about 2,200! than after warm up the revs go up and down for awhile before its back at 2,200. Ive searced the forums and the tech article about fixing it.. but it just touched base. Im not an idiot and can figure most things out.. this ones odd.. a few weeks ago i got my car out of storage and it was idleing fairly high.. and so i timed it and screwed the throttle body screw in to bring idles down to about 900! I was like yea i got this figured out.. now its back to being pazzest. Ive unplugged the IAC and the idle goes down so i know it shouldnt be that! I know i have a bad 02 too... like the title says.. theres also black sute... (unburned gas) that drips out the tail pipe! The ecu was chipped to mugen specs (so they say haha) so i know it dumps in a bit more fuel.. I dont think they would at idle but you never know. but when i play with my vafc i can go in to narrow throttle and bring down the fuel from there and it idles a lot better. Im just afraid of it hurting the motor so i dont leave it there! Any suggestions? Im kind of stuck with this ecu so please dont tell me to swap in the normal p13... FIY its an h22.. basic mods... only mods to fuel system is the AEM fuel rail and B&M fuel gauge!
     
  2. cycloneb18c3

    cycloneb18c3 Senior Member

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    sounds like the timings off to me. dont know how it happened by just sittin in storage...
     
  3. Accordturbo94

    Accordturbo94 Senior Member

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    no it was doing it before than too!
     
  4. cycloneb18c3

    cycloneb18c3 Senior Member

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    it started when u got the ecu? If so I would have the chips fuel and timing maps checked out, because they advance the timing and dump more fuel, but usually not enough to really screw with the idle and have gas dumping out the exhaust.
     
  5. B18C_NA

    B18C_NA Banned

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    werd with cyclone, swap out a stock ecu, see what happens.
     
  6. swanny

    swanny Senior Member

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    Im thinking IACV time, I got a write-up on it im working on. Its pretty easy, only takes an hour or two. Ill Have pics and stuff for the write up tomorrow, i left the disk at work.
     
  7. Accordturbo94

    Accordturbo94 Senior Member

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    Its weird guys... its like an off and on thing.. I just got it running great a few days ago like I said.. than I figured out another problem with my car (vtec not engageing right because lack of air from airfilter) wait... I just am thinking here now! awhile back i figure out why my car wouldnt engage vtec strong and it was because the airfilter got to far up on the intake tube cutting air supply... so when i figured that out.. shit was good.. and if i remember right it was still idling good... but than all of a sudden the idle sits at 2200-2300 than after a minute or two it starts idling up and down than if i keep driving it it.. it stops idling up and down and stays at 22 or 23! Basically what im saying is maybe the only reason why i recently got it idling properly was because i was cutting air supply off... but than again thats may not be intierly true
     
  8. Accordturbo94

    Accordturbo94 Senior Member

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  9. cycloneb18c3

    cycloneb18c3 Senior Member

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    check all your vaccuum hoses(especially the Fuel Pressure Regulator(that will cause your engine to idle messed up). also sounds like idle up and down could be IACV...
     
  10. Accordturbo94

    Accordturbo94 Senior Member

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    dude my car is fuckin retarded! Just last night it started to idle @ 1100... which IMO is way better than 2400 for the time being... I swear hondas piss me off! lol... anyone else know what it could be.... and why i have unburnt gas when im parked all over the ground
     
  11. Accordturbo94

    Accordturbo94 Senior Member

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    no one knows huh? typical for this board
     
  12. Slammed90Lude

    Slammed90Lude Senior Member

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    intake manifold gasket- i've said this a thousand times, but there is a pretty good chance that the IM gasket is causing this- I would put money on it def. being some type of vacuum leak, regardless of where it is though- it's a 5 dollar part, my prelude did this when i had the blown gasket- The ECU ran the fugger rich as hell because it was losing air out of the intake manny and didn't know what to do- tip was black with carbon deposit and it idled either high or irratic- now get wrenching!

    PS- sute is not a word- k thnx- it's soot
     
  13. Accordturbo94

    Accordturbo94 Senior Member

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    Yeah I have the hondata intake manifold gasket! its plastic... thats fine... and i checked to make sure all the bolts were there and tight! fuck hondas!
     
  14. civic_types

    civic_types Senior Member

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    Throttle positioning sensor
    Bolt on throttle body
    O2 sensor

    Is it throwing a code ?
     
  15. Slammed90Lude

    Slammed90Lude Senior Member

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    well then I still think you have a vacuum leak homie- That's what it def. sounds like to me :shrug:
     
  16. whiteLS

    whiteLS Senior Member

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    check the coolent temp sensor could be causin it to run rich. but the high idle im stumped on.

    gl :shrug:
     
  17. B16RacerN2NR

    B16RacerN2NR Working Hard VIP

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    as for your idle problem, it sounds to me like you have air in the cooling system. bleed the head while your dumping in water/coolant. the coolant is what shuts your FIT valve. i can almost guarantee that's what it is since you have no vacuum leaks. as far as you having so much unburnt gas, half of it is because of the mugen program and my guess is the other half is from a roasted catalytic converter. hope this helps.
     
  18. Accordturbo94

    Accordturbo94 Senior Member

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    Hey guys Ive also noticed... the heat isnt as hot as it used to be! and the gauge is still working properly... right under the middle level line! anything else
     
  19. SixtySecondAssassin

    SixtySecondAssassin Senior Member

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    more fuel = cooler charge temps

    i dont know if your dumping in enough fuel to feel this effect in your heater, but i doubt it.
     
  20. Accordturbo94

    Accordturbo94 Senior Member

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    hmm.. yeah i cant figure it out
     
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