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Bad idle for 300 Seconds 2 Logs Attached

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bo0st

10+ Year Contributor
835
24
Jan 26, 2010
Phoenix, Arizona
I logged every possible thing this time. Car is a bone ass stock 95 GST with just a K&N air filter and a aftermarket Greedy BOV. Nothing else has been changed.

Log 1 is the 783 seconds one you can see it starts cold pretty rough then after 300 ish seconds it's a lot better actually drive able.

Log 2 is a short 57 second log that shows how the car is once it's hot, it starts up and idles great. (Once the car is hot)

Log 1 was "locked in open-loop mode" while Log 2 is not.

I hope these can help pinpoint & resolve the problem. The front 02 sensor doesn't seem like it has much activity.

From what I've been told, it's the "front O2 sensor" but I've been told just about everything under the sun. Everyone has a opinion I'm looking for the facts on what my problem is.

Any knowledgeable replies are greatly appreciated guys.

Changed my front O2 sensor based on the many opinions here and at the official ECMLink forums and my cold start problem is still there.

My old mechanic knew that the 02 sensor had nothing to do with cold starts but he changed it anyway.

Anyways here's a new log if anyone knowledgeable can really fix this problem I'll send you $100 via PayPal I've been screwed left & right by mechanics, even Mitsubishi I had to sue them and get my $1700 back

Need some serious help guys after 5 minutes the car is hot and idles perfectly why doesn't it idle good when it's cold?
 

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my car is having the same problem as your on a cold start. idles like crap but at operating temperatures its fine. mine started to do it when i changed my injectors from 450 to 1050cc... i have a few guesses that might help you out, adjusting the tps screw on the throttle body and is your bov venting or recirculating
 
my car is having the same problem as your on a cold start. idles like crap but at operating temperatures its fine. mine started to do it when i changed my injectors from 450 to 1050cc... i have a few guesses that might help you out, adjusting the tps screw on the throttle body and is your bov venting or recirculating

It's recirculating
 
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