90 gs idling problems - Team Integra Forums - Team Integra
 
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post #1 of 13 (permalink) Old 02-22-2012, 09:35 AM Thread Starter
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90 gs idling problems

i just recently bought a 90 gs the car is super nice inside no rips or stains has the power sunroof ..only bad thing is it has high miles probly on the original motor im talkin like 240,xxx and once it warms up the car starts to act really weird like it seams like the idel or someting is off itll like rev up then bogg right down over and over again im going to do a complete tune up on it but dose anyone have any idea about this reving up and down?
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post #2 of 13 (permalink) Old 02-22-2012, 10:41 AM
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Do you have a check engine light on?

The Game is Afoot

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post #3 of 13 (permalink) Old 02-22-2012, 01:10 PM
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Quote:
Originally Posted by DAmondread View Post
Do you have a check engine light on?
I used to get error codes from the ECU without the check engine light on though, but it's a good indicator.

That's the place to start, check the codes from the ECU located under the carpet on the passenger's side, Lift the carpet up and locate the ECU.

With the key in the ON position, the ECU should give you some codes through an LED inside it. Count the Long flashes first, then the short flashes.

Four long flashes followed by three short flashes mean you have a code 43.
One short flash means you have a code 1.

Tell us how many flashes you're getting from the ECU, I'm having the same Idle problem too, also check for vacuum leaks.
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post #4 of 13 (permalink) Old 02-27-2012, 03:42 PM
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Try cleaning your IACV and check for vacuum leaks
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post #5 of 13 (permalink) Old 02-27-2012, 03:55 PM
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Start by bleeding the cooling system, surging idle can often be caused by an air pocket in the thermal IAC valve.

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post #6 of 13 (permalink) Old 03-02-2012, 04:25 PM
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as stated above, check for vaccum leaks and clean your fitv and iacv. i have the same problem but havent been able to fix it yet. more often then not its caused by some type of intake manifold leak and makes it think its getting less air than it actually is, causing a surging idle. check all your vaccum lines, pcv valve, egr, throttle body etc. there is also two plugs on the left side of the head that sometimes leak, though this is rare. i suggest doing a leak down test on your im gasket also just to be sure. hope this helps.

Last edited by 4WiLdOnE; 03-02-2012 at 04:27 PM.
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post #7 of 13 (permalink) Old 03-02-2012, 06:59 PM
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i second the fitv since the weather is kind of cold right now; im not sure of your engine but on my ls its under the throttle body, i just did mine yesterday, make sure coolant is cool/ car is cold, remove intake, unbolt the three bolts, remove lines connecting to, it wrap them up or point them upward, take the flat cap off the end, turn the slotted spring adjustor all the way in then back it out 1/4 turn, then reinstall just make sure not to loose the gaskets when you take it off, snap a bolt or strip the bolt hole.
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post #8 of 13 (permalink) Old 03-02-2012, 07:19 PM
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When I purchased my 1st Integra GS-R it did exactly same thing. Found out it had wrong ECU (from LS Integra...) Installed correct ECU and the problem dissapeared....
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post #9 of 13 (permalink) Old 03-05-2012, 03:29 PM
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Depending on where a vacuume leak is, I suppose a surging idle is possible from it, but not likely. High idle yes. Since integras do not use a Mass Air Flow sensor but a Manifold Absolute Pressure sensor a vacuume leak is not unmetered air, the computer knows about it and it will add extra fuel to match the air hence high idle.
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post #10 of 13 (permalink) Old 03-05-2012, 04:00 PM
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Take the idle air control valve off, and take the screws out of it. The white thing inside there, turn it clockwise till it gets stiff. I've seen this tons of times and if that doesnt solve the problem, i'd be very suprised.

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post #11 of 13 (permalink) Old 03-07-2012, 02:39 PM Thread Starter
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ive tried to bleed the radiator and checked for leaks no luck.but i had to replace the rear calipers and now i cant get them to bleed the lines are all intact no leaks lol nothing like my chevy
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post #12 of 13 (permalink) Old 03-07-2012, 10:11 PM
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your brake problem may be from not bleeding them in the right order, but this may only be when you have had your whole system open. on 2nd gens its closest to farthest, dl, pl, rl, rr. good luck.
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post #13 of 13 (permalink) Old 03-08-2012, 04:44 PM
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I chased the same problem in my 90 GS for 3 months with only 140K miles and it turned out the IAC was just bad and needed to be replaced. Everyone here just said to clean it which did nothing for me. Adjusting and cleaning the FIAC valve did show some improvements but it still had a hunting idle when the AC was on from the bad IAC.
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