Maf or vaf circuit malfunction

random multiple cyclinder misfire

timing high res signal a to few pulses

secondary air injection valve a malfunction

p16141 aux inputs outputs

this is my recent post below


i have a 97 z28 i have been having some trouble out of it...it's sometimes hard to start and if i get it to start it will go right back dead sometimes like lastnight i crunk it and drove it fine with no problems but this morning i went to get in it and started it crunk up fine then went back dead after about 5 secoonds and now it's hard to sta

 

Post the EXACT numerical codes, not the descriptions. Appears you are pulling descriptions off the scanner or from a generic GM code list. You have to use an LT1 specific code list, like the one on Shoebox's site. Click the OBD-II tab at the bottom of the page frame:

http://shbox.com/1/Dtcs.htm

There is no such code as P16141.... the codes are 1 alpha and 4 numbers. Could you possibly mean P1641, which is for the Fan #1 relay?

And so other people can reference your recent posts, since you just changed the Opti and the radiator, and appear to have suspected the Pass-Key system as well:

https://www.camaroz28.com/forums/sho...d.php?t=719273

https://www.camaroz28.com/forums/sho...d.php?t=719486