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Old 01-23-2009, 04:28 PM   #1
jacky599r
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Default what to check for irratic idle and stalling?

Hello,

I have this problem quite sometime back but its starting annoy me even more as the day passes. The car idles smoothly at times, just like stock. However, at times (getting more frequently) it will seems like its hunting to get back to the ideal idle rpm, causing the oil press alarm in my defi to go off with it. Ive cleaned my tb and maf sensor. A point to note is i have a cusco super single clutch kit which comes with a lightened flywheel. The thing is the erratic idle problem has already been there but i guess the lightened flywheel just escalated it and made it the engine stall occasionally. I would like to check who has got the same experience and what can i do / check to remedy the situation. Cheers!
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Old 01-23-2009, 05:23 PM   #2
GrimmSpeed
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Check your sparkplugs and electric. If everything seems fine there try consulting your tuner or posting logs online.

Mike
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Old 01-23-2009, 05:54 PM   #3
verc
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Check your grounds too. Do you have aftermarket electronics? Make sure everything is properly grounded. No exposed wires, no miswired stuff. This happens quite often and messes with your idle.

Also, check that you have oil haha. <-- stupid I know, but one time it turned out I had very little oil in the car for some odd reason....
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Old 01-23-2009, 06:32 PM   #4
the suicidal eggroll
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Do you have a wideband or can make some logs?
Sounds like a vacuum leak to me
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Old 01-23-2009, 07:13 PM   #5
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Most weird idles problems are due to vacuum leaks in my experience. Check all your vacuum fittings and lines.
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Old 01-23-2009, 11:44 PM   #6
saab-on-the-cobb
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Quote:
Originally Posted by Unabomber View Post
Most weird idles problems are due to vacuum leaks in my experience. Check all your vacuum fittings and lines.
Yes, and inspect the MAF sensor for dirt/buildup.

sotc
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Old 01-24-2009, 07:19 AM   #7
jacky599r
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yo. Thanks. The problem will start to show during e warm up cycle. Its very pronounced during a stop and go situation, like that of parking my car. I must admit e electric system is not the best since i have tie engine pulled twice affecting the groundings. I do have a wide band and will loh and post it
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Old 01-24-2009, 05:59 PM   #8
xrallyx
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maf/map vac lines, replacement of bypass/recirculating valve with bov?
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Old 01-25-2009, 08:28 AM   #9
Iflysti06
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Had the same problem once and grounding was my issue!
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Old 01-26-2009, 07:58 AM   #10
jacky599r
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argh, my new laptop just wouldnt sync with the usb to serial controller! pissed and i cant get any logs out.
Anyway, how do u go about checking that its the grounding thats causing this?
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Old 01-26-2009, 10:51 AM   #11
the suicidal eggroll
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No need to log the wideband as long as you have a gauge on it, just tell us what it's doing.
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Old 01-26-2009, 11:20 AM   #12
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ok, sure i think ill log down just the activites in idle without the wideband
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Old 01-27-2009, 12:34 PM   #13
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where can i get the instructions to post datalogs?
i have some logs from my utec
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Old 01-27-2009, 01:03 PM   #14
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Do you have an after market BOV?
Sounds like you may need a stronger spring in it...
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Old 01-27-2009, 02:05 PM   #15
jacky599r
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hmmm. i have the forged bpv. it holds boost well as i just got the car tuned.
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