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Problems!! Please help. Car idles fine but when I put it in gear and accelerate dies

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Old 09-19-2012, 06:38 PM
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Default Problems!! Please help. Car idles fine but when I put it in gear and accelerate dies

Heres the details. 2000 ls1 with Lg Motorsports cam and all the other supporting parts. The car will idle fine but it dies once in gear and I push the accelerator. I checked the iac out to see if It is functioning and it is. Possible PVC?? It does have a stock intake. I'm lost and need to figure out the problem ASAP. Thanks guys any suggestions will be huge help at this point.
Old 09-19-2012, 06:48 PM
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need alot more info man. Did it run fine before then just start doing it? does it rev fine in p/n? give as much info as possible and i'm sure somebody will be able to help you out
Old 09-19-2012, 06:51 PM
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A data log wouldn't be a bad ida.....
Old 09-19-2012, 09:31 PM
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It started doing it over a period of time aproximately 2 months I would have to feather it to reach an rpm and then it would run fine until a stop sign then repeat. It will not rev at all in park and nuetral let alone anything else. Thanks for the interest im looking everywhere for info to atleast get it moving until I can get it to a tuner
Old 09-19-2012, 09:38 PM
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Any cel light? If its getting worse over time it shouldn't be a tune issue. Did you change anything right before it started?
Old 09-19-2012, 09:38 PM
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Pcv at top ** autocorrect. I did notice the iac had quite a bit blowback oil on it. Is that normal?
Old 09-19-2012, 09:41 PM
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I put a th400 Trans in and ran the modulator to the brake vacuum. I saw this slow progression several months afterward
Old 09-19-2012, 09:58 PM
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@outkast the check engine light is on for several reason. 9 codes mostly of what are expected but an iac I found abnormal. The iac is working when I turn the key I found out the hard way after I checked the codes and pulled the Iac turned the key and it went flying. Is it possible it's not working how it should be and causing this problem? Just trying to feel out all possibilities. Thanks for the input
Old 09-20-2012, 06:27 AM
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What are the hot idle IAC counts at idle? What is the TPS reading at idle?
Old 09-20-2012, 06:57 AM
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was the car tuned after the th400 swap? as far as the iac with the key on it should fully extend itself, not sure about going flying though. do you have the ability to get a data log? if you do i'm sure somebody can help you out
Old 09-20-2012, 03:07 PM
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I've had TH400 modulators leak internally and pull trans fluid into the intake....



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