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funny vacuum leak

Discussion in 'General Tech and Maintenance' started by peeonu25, Aug 13, 2008.

  1. peeonu25

    peeonu25 New Member

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    Surging Idle *Video inside*

    YouTube - Accord H22 Idle Surge

    For everyone having simlar problems... i suggest you look into the voltage of your TPS mine was at .14* i slighty unscrewed it(same concept at the dizzy), played with it until i got the voltage to .47* closed throttle and 5.2 WOT

    Also solved the starting problems by blocking off the EGR valve.


    Issues:
    doesnt want to start, exhaust rushes back into the intake manifold.

    Buzzing noise when starting, stops when i release the clutch

    idles fine when cold, when its warm the idle surges. (IACV PCV TBS)

    while its idling if i give it gas its luggish and cuts out (also possibly timing?)

    What I've tried:

    Ive cleaned the IACV, FITV, TB and ive checked for vacumm leaks found a metel tube off of the intake (cruise control) that was uncapped.
    ____________________________________________

    Picked up a CD5 with an H22 in it today. I'm not much of a fan of buying someone elses work but i couldnt help myself. I am now a proud owner of a riced out CD5 with an h22 swap and a 98% stock (lowered with wheels) USDM CD5.

    CEL is on

    its got an erratic idle, when cold its fine, but when it warms up it bounces from 1400 to 2500 kinda slowly 1.5 seconds inbetween surges. it's also hard to start, when i turn it over it takes a bit to start it and when it does, it sounds like its going to die. i figured it was the IACV, no big deal. took off the IACV, cleaned it out same problem ruled out the TPS since it only does this when its warm.

    unplugged the IACV only to have the same problem persist, but differently. instead of it surging from 1400 to 2500 it how did it differently. now it was surging from 1000 to 1200 very quickly, that being said i figured it wasnt the IACV since unpluging it should stop the surging.

    so i figured oh hey lets see if the FITV hole has suction, so i take off the air intake, put my finger over the hole in the TB and SHOOP it feels like a shop vac, so me being the curious person that i am i put my finger over the ICAV hole to kill the engine... it kept running... theres such a huge leak from the FITV that i had to put fingers over both holes to shut down the motor.

    now while typing this up, i realized... while plugging the FITV hole it didnt cause the idle to stop bouncing, would that mean the FITV isnt the problem? or would it mean that since i didnt reset the ECU it wouldnt make a difference?

    tomorrow when its light, I'm going to unplug the IACV while the air intake off of the TB and place my finger over the FITV hole to see if it stops the surging, if it does... ive found my problem FITV. if it doesnt... could it mean my IACV AND my FITV is bad? that may sound stupid, but since the suging gets worse while the IACV is plugged in, and i know the FITV isnt supposed to have any suction.
     
    Last edited: Aug 16, 2008
  2. t3t4delsol

    t3t4delsol New Member

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    clean the iacv while you have it off with some seafoam or carb cleaner, make sure the small screen has nothing blocking the holes, also check your pcv valve to make sure it still rattles
     
  3. peeonu25

    peeonu25 New Member

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    I have yet to touch the PCV or the TBS

    Cleaned the IACV and the FITV today along with the TB.

    its now running worse than it was, its boggy now, kinda like when you run it with your IACV unplugged.

    video will be added to the origional post shortly
     
  4. peeonu25

    peeonu25 New Member

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    I have 2 CD5 accords, one with the stock F22 and another with the H22A, the TBS looks exactly the same on my other CD5, could i start to use it as a doner car?
     
  5. lawmann8

    lawmann8 New Member

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    Do all Hondas have this problem? I have a 96 Prelude that is doing the same thing. I have cleaned the IACV, adjusted the FITV and adjusted the TB idle screw and I still have the erratic idle. When I unplug the IACV with the engine rnning, the engine dies or sometimes when it stays running, it will surge when you press the acelarator. Does anyone out there know what I can do? Help me please!!!!!!!!!!!
     
  6. lawmann8

    lawmann8 New Member

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    I wasn't paying much attention to your first answer in this string regarding the TPS. What is the procedure for checking and adjusting the sensor? Thanks.
     
  7. George777

    George777 ^^ Likes Bewbies

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    Start your own thread
     
  8. peeonu25

    peeonu25 New Member

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    hummm funny... this is my thread not yours... you took the time to reply to this guy telling him to make his own post... yet you didnt even bother giving your .02 on my situation. stop trolling, try to be productive.

    its on the same subject and there is NO reason to start one more thread on another erratic idle problem.
     
  9. peeonu25

    peeonu25 New Member

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    mine wasnt my TPS, I'm having some distributor issues.

    but to adjust your TPS you need to beable to read the volts, luckily my VAFC has a TPS moniter so i had it easy.

    try to find a wright up on how to tap into the wires so you can get a reading, you can go to radio shack and buy taps so you dont have to splice and cut any wires you just clip em on, they work very very very well for this kind of situation.

    on my 94 f22b accord the TPS is rivited on so you cant move it, so if yours is like this, you can always drill out the rivits and just replace them with screws.but on my h22 its adjustable. all you do is loosen the scews on the back of it, move it around until you get about .4v when the throttle is closed and around 5.0v when its wide open.
     
    Last edited: Aug 17, 2008
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