95 Z28 LT1 Engine won't idle or run without help
06-17-2017, 03:51 PM
#1
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Join Date: Jun 2017
Location: Central Illinois
Posts: 14
95 Z28 LT1 Engine won't idle or run without help
Just got this 95 Z28 LT1 5.7 Camaro a couple weeks ago. Ran like a scalded dog. Coming home the other day, I dropped the auto trans selector down into 2nd and goosed it (did not even floor it). The SES light came on, and iIt started running so rough I barely got it home. Won't idle. Starts, but I have to continuously work the accelerator to keep it running. It will rev up above 4 or 5K, but I have to continuously work the pedal to keep it running.
Replaced the MAF sensor; no joy. It has the OBD1 system with the 16 pin OBD2 connector, so I got the right ALDL cable and installed the scan9495 software. I get data, but the software tells me that there are no codes, even though I have an SES light and it runs horribly. Anybody have any idea what I can try from here. I was sure that I was going to find a code that would put me on the right track. Any help would be greatly appreciated. Thanks!
Replaced the MAF sensor; no joy. It has the OBD1 system with the 16 pin OBD2 connector, so I got the right ALDL cable and installed the scan9495 software. I get data, but the software tells me that there are no codes, even though I have an SES light and it runs horribly. Anybody have any idea what I can try from here. I was sure that I was going to find a code that would put me on the right track. Any help would be greatly appreciated. Thanks!
06-20-2017, 06:09 PM
#2
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Join Date: Jul 2005
Location: Okemos, MI
Posts: 9,479
Re: 95 Z28 LT1 Engine won't idle or run without help
I don't know much about this stuff, but if scan9495 says no codes, I'm suspicious that everything is working correctly between the PCM and the software.
GaryDoug is a member here and is the author of scan9495. There's no better resource. Maybe send him a PM?
GaryDoug is a member here and is the author of scan9495. There's no better resource. Maybe send him a PM?
06-20-2017, 06:24 PM
#3
Super Moderator
Join Date: Jul 2005
Location: Okemos, MI
Posts: 9,479
Re: 95 Z28 LT1 Engine won't idle or run without help
Oh, i see there's another thread where GaryDoug is already helping. I'm going to close this one so things stay focused.
The other thread is here:
https://www.camaroz28.com/forums/lt1...unning-885735/
The other thread is here:
https://www.camaroz28.com/forums/lt1...unning-885735/
06-21-2017, 12:18 AM
#4
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Join Date: Nov 1998
Location: Hell was full so they sent me to NJ
Posts: 70,648
Re: 95 Z28 LT1 Engine won't idle or run without help
This was the result of the 'approval' mystery.
