Stuttering Warm Startup for 10 secs

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Old Jul 29, 2005 | 10:16 PM
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Default Stuttering Warm Startup for 10 secs

This never happens during cold start, but when warm start up, there is about 50% chance that the engine idles at a very low rpm (maybe like 100-200 rpm) and when I give it half throttle it slowly goes up, and after about 10 seconds of revving it up, the idle is fine.

Any idea what my problem is?

I already have perfect 14.7 AFR idle when this problem does not occur or after several seconds. TUned with uberdata.

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Old Jul 29, 2005 | 10:22 PM
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Default Re: Stuttering Warm Startup for 10 secs (elpiar)

obd2 or obd1 car originally?
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Old Jul 29, 2005 | 10:24 PM
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Default Re: Stuttering Warm Startup for 10 secs (elpiar)

Originally OBD2b (2000 GSR) but swapping to OBD1 P72 ECU
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Old Jul 29, 2005 | 10:27 PM
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Default Re: Stuttering Warm Startup for 10 secs (elpiar)

sometimes uberdata wont control the obd2 iacv, if you wanted to take the time to swap over to the 4-wire ( ithink, might be 2) iacv then that problem will go away
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Old Jul 29, 2005 | 10:43 PM
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Default Re: Stuttering Warm Startup for 10 secs (wantboost)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wantboost &raquo;</TD></TR><TR><TD CLASS="quote">sometimes uberdata wont control the obd2 iacv, if you wanted to take the time to swap over to the 4-wire ( ithink, might be 2) iacv then that problem will go away</TD></TR></TABLE>

Can you tell me more about this? Any thread about it?
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Old Jul 30, 2005 | 08:18 PM
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Default Re: Stuttering Warm Startup for 10 secs (wantboost)

need more help on this
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Old Jul 30, 2005 | 08:59 PM
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Default

sounds like a eacv(electronic air control valve) at the back of the intake manifold is not working properly, i had the same problem when i ran an automatic intake manifold and just let the eacv hang with the coolant lines connected and wire plugged in. Maybe try a different eacv or just clean it with wd40?
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Old Jul 30, 2005 | 09:15 PM
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Default Re: (turbo_CRX)

its somewher on the ud forums, i think its stickied at the top. sometimes with certain cars it just wont work, lol. i wish i could explain in better but im dead on my feet right now, tomorrow i'll look through the ud forums
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Old Jul 30, 2005 | 11:47 PM
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Default Re: (turbo_CRX)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by turbo_CRX &raquo;</TD></TR><TR><TD CLASS="quote">sounds like a eacv(electronic air control valve) at the back of the intake manifold is not working properly, i had the same problem when i ran an automatic intake manifold and just let the eacv hang with the coolant lines connected and wire plugged in. Maybe try a different eacv or just clean it with wd40?</TD></TR></TABLE>

I thought I only have IACV. Can someone give me a diagram or photo to point out which one is it on my gsr?
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Old Jul 31, 2005 | 08:18 AM
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Default Re: (elpiar)

eacv, iacv all the same thing, ppl just call them different names.
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Old Jul 31, 2005 | 09:08 PM
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Default Re: (wantboost)

more help?
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Old Aug 4, 2005 | 08:02 AM
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Default Re: Stuttering Warm Startup for 10 secs (elpiar)

up
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