Ok. 1995 LT1 camaro T56. I have been having issues with this for a while now. I start my car while it's cold it runs fine. It warm up it goes into limp mode. We started looking at the scanner and the TPS sensor voltage was a little hight. We set it to factory specs and the percentage works.1-100%. But as soon as it gets too 100% it resets the persentage to 4% and stays there. Even if I rev it up while it's running.... It has a new computor, New TPS sensor, all new MAF, MAP,O2's, new reflash, man, we cant figure this out. We thought the throttle body was causing this by going past 100%. they told me the Holley 58mm was junk and get something else. I refuse to beleive that. It was doing the same thing with the stock throttle body. Could the problem be in the harness....? Thats the last thing I have to replace. Anyone else had this problem?

 

anyone?

 

If you stall have the stock PCM, I'd swap it in and see if the problem goes away. If the problem remains, check the wiring harnesses, plugs and grounds. Make sure the block ground strap is in good condition. Bad grounds can cause havoc.

 

Mine only goes to 99% if it's of any help. Also, since you didn't say, .52-.60v closed and 4-4.5v open.

 

Yeah, well the computor runs in Limp mode right, richens up the Fuel and backs the timing down. It runs awesome at idle up to 2500 rpms and then all hell us released. It's just an electrical problem but it is kicking my ***. i know this has happend to someone else as well. I have replaced the computor twice. Even the stock one was doing the same thing. But i put it in my 94 Automatic and it ran awesome.

 

So we can rule out the computor being the culprit.

 

Someone...

 

Anyone?

 

Just looking for more info :

So, when its COLD it runs fine, no issues at all with percentage or codes or limp mode... no problems right?

Whats the voltage on the TPS look like when its cold vs. warmed up?

 

.56 and it runs great when cold, no percentage issues until warm.

 

anyone...