High Idle
01-29-2004, 12:46 AM
#1
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High Idle
I have a standard "96" NA with no upgrades. Car runs fine except that once engine is warm when i come to stop, the idle will remain high around 1500. Sometimes it will gradually return to normal 800 - 900, other times it stays at 1500. If I pump the gas a bit, it always returns to 800 - 900 range. Does anyone have a suggestion as to what I might have looked at?
01-29-2004, 10:49 AM
#3
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Join Date: Jul 2003
Location: Salinas, CA
Posts: 3,074
I don't know what could cause that, but I believe the NA's idle shouuld be at about 750. Go read this thread on the idle screw:
https://www.zdriver.com/forums/showt...&threadid=8202
And maybe this one too:
https://www.zdriver.com/forums/showt...&threadid=8286
Maybe those will help in some ways.
https://www.zdriver.com/forums/showt...&threadid=8202
And maybe this one too:
https://www.zdriver.com/forums/showt...&threadid=8286
Maybe those will help in some ways.
01-29-2004, 12:45 PM
#4
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Join Date: Nov 2003
Location: Gerber, CA
Posts: 3,672
Let me know what you guys find. I've been chasing an intermittent high idle problem myself. It'll idle real high when cold (1400-1800). 1400 is normal for cold start, but when I start to pull forward or backward, if I let off the gas, it shoots to 1800, or higher. Warm/hot running is better. It hovers between 900-1200, but it's still too high. I'm waiting to fix my aux air valves and replace the O2 sensors before I start playing with the idle control valve.
have you guys tried adjusting it with that screw thingy
01-29-2004, 02:27 PM
#6
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Join Date: Jul 2003
Location: Salinas, CA
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Here, maybe these will help too:
http://twinturbo.net/net/viewmsg.asp...&msg_id=855473
Go through this to check up on your idle and have fun!
http://twinturbo.net/net/viewmsg.asp...&msg_id=855473
Go through this to check up on your idle and have fun!
01-29-2004, 09:01 PM
#8
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Join Date: Oct 2003
Location: Palmyra,Va
Posts: 1,494
i know man, but i've been so wired, and i've been doing so much, that right now i am running on coffee, and i just can't fall asleep to save my life....my eyes just won't close....i feel like a junkie on coke...hahahaha.
01-30-2004, 01:40 PM
#12
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Join Date: Nov 2003
Location: Gerber, CA
Posts: 3,672
Haven't tried it yet. That's what weekends are for. Some of us work during the week. Combine that with the fact that I've felt like crap the past couple of days usually means that car repairs can wait.
01-30-2004, 02:23 PM
#16
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Location: Gerber, CA
Posts: 3,672
Oh, I always have questions, but they may not have to do with cars. My goal is to rebuild my AIV's this weekend. I'll probably tackle the clutch/downpipes/flywheel/driveshaft and O2 sensors in March.
02-12-2004, 09:37 AM
#20
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Location: Gerber, CA
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Mine does the same thing, but it isn't normal. I speculate that I have a vacuum leak on both sides of the car in the tubing that runs from the air fliter , back into the engine compartment. I haven't had a chance to get under the car and research it further. The reason I think this is because when I cleaned my air filter, I noticed those tubes were loose. Hopefully I can do something with it this weekend or next. I'll let you know.
03-03-2004, 08:10 AM
#22
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Location: Gerber, CA
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OK guys, I went through and tightened everything between the the MAF (happy EMO?) and the idle didn't change. There is only one more place where there could be a vacuum, and that is at the intake pipe before the turbo. When I replace the clutch, I should be able to get to that quite easily. I did adjust the idle screw. It took 2.5 clockwise turns to get the idle down to 700, but the key is that the idle is now where it's supposed to be. 
.
.
03-04-2004, 03:40 PM
#24
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Join Date: Nov 2003
Location: Gerber, CA
Posts: 3,672
Hey, come on, don't burst my bubble. 
I'm basing my comment of "no more vacuum leaks" on the fact that my idle drops down to 700ish quite quickly. If there was a vacuum leak, the idle would drop much more slowly.
I'm basing my comment of "no more vacuum leaks" on the fact that my idle drops down to 700ish quite quickly. If there was a vacuum leak, the idle would drop much more slowly.
03-04-2004, 08:17 PM
#25
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Location: Salinas, CA
Posts: 3,074
ohh, gotcha. I was just giving you another option of what could be going on. I mean, if you tighten everything including the intake pipes near the turbos and it stilll doesn't fix it, it could be like what I said earlier. I'm just looking out for u.
