LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Need diagnosis ASAP

Old Jun 18, 2011 | 12:02 PM
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Default Need diagnosis ASAP

I have a buyer coming to get my Camaro on Wednesday, and I've just finished doing some work on it which includes new air intake customs made, removal of exaust currently running open y pipe new radiator and lt4 knock module

Now the issue is that for the first several minutes the car drives great but after alittle driving it will cut out when I accelerate, the issue seems to stop if I keep the rpms up slightly higher then idle. I have to get this fixed quick or he may back out. Tried disconnecting the battery for an hour, still same issue
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Old Jun 18, 2011 | 12:45 PM
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So.performance suck when it goes.into close loop? Your going to need to view live data to come up with a better idea what's.going on. Could be anything from o2 to MAF need to scan and view first. Not enough info to help you out.
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Old Jun 18, 2011 | 12:52 PM
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any codes yet?

is the maf and iat plugged in?

since you eliminated the rear o2 sensors, are they deleted in the pcm?
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Old Jun 18, 2011 | 01:00 PM
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No codes, theyre plugged in and I haven't had rear 02 for years now, it feels like the maf but I can't figure out y it would only do it once it's been on the road, and it doesn't start directly when closed loop starts aswell
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Old Jun 18, 2011 | 01:03 PM
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One guy said not enough back pressure?
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Old Jun 18, 2011 | 03:43 PM
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On one of my lt1 I run open y dumped and after she is warm has a little lag in power on the low end for a split sec but that's it. Plus its untuned.
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Old Jun 18, 2011 | 04:13 PM
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this seems like its going to be a bear to fix
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Old Jun 18, 2011 | 09:33 PM
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Second MAF sensor, probably fucked up when you swapped the intake setup.
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Old Jun 19, 2011 | 07:45 PM
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will give it a shot
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Old Jun 20, 2011 | 11:18 AM
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no go an other ideas?
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Old Jun 20, 2011 | 11:30 AM
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Not sure if you have front O2's.. if you do then unplug them and drive around again.
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Old Jun 22, 2011 | 10:57 AM
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bad gas maybe?
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