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#1
11-06-2007, 03:27 PM
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Idle issues again
So the car seems to be running better than it's been, however when I pop it out of gear, the idle tends to sit at about ~1500 or so until I come to a complete stop. If you remember, my EGR pipe decided to rub against my wire harness after the swap and melt the loom and the insulation and was causing a short. Moved those out of the way and it was fine.
After the accident, I did the same thing and the wires were touching the pipe, melted and shorted a little more. Could the shorting have burned out the IAC and/or TPS to a point where it's not working that great, but yet not throw a CEL? The TPS seems to be fine according to the SAFC. Shows throttle position perfectly. And there's no problems with the car actually running, which leads me to believe possible IAC failure. Any thoughts on this? If that's the case, this will be my 3rd IAC in almost 4 years now.
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2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP 
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#2
11-06-2007, 04:51 PM
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Re: Idle issues again
Test the bitch.
Turn ignition off. Disconnect Idle Air Control (IAC) motor connector. Using a DVOM, measure resistance between IAC motor connector terminals No. 1 and 4, then between terminals No. 2 and 3. See Fig. 9 . Resistance should be between 38-52 ohms at approx. 68* F. If resistance is within specification, IAC motor is okay. If resistance is not within specification, replace IAC motor. 
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95 Talon TSI AWD 97 Eclipse GST 
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#3
11-11-2007, 11:09 AM
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Re: Idle issues again
Ok so I took the TB off and tested the IAC and the TPS and they both work fine. I noticed the butterfly was kinda sticking when closed, even after I cleaned it. I did some really lite sanding around the edge on the butterfly and it's more smooth, but keeping a good seal.
This seemed to help out quite a bit, but still idle problems. Flapper is closed all the way, not sticking anymore, but still when I pop to neutral idle still takes a while for it to drop down. Any ideas?
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2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP
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#4
11-13-2007, 05:11 PM
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Re: Idle issues again
I was reading up on some MegaSquirt reviews on 2gnt and one of the guys said he had a shitty idle that he couldn't figure out for the life of him. When he got the MegaSquirt, all the idle problems went away. Just something to maybe look into being as you'll need it eventually anyways.
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95 Talon TSI AWD 97 Eclipse GST
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#5
11-13-2007, 05:30 PM
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Re: Idle issues again
Sounds like a vacumm leak. When I removed my EGR, I forgot to go back and plug that nipple. The car ran fine except it would take a while to idle down to normal. I would disconnect every line, one at a time and plug it off and see if that helps.
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98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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