A friend of mine has a 94 Camaro Z-28 with the auto and 83000 miles on it. Everytime he mashes the gas it stumbles spits and sputters. But when above 2000 rpms it runs great. I got a hold of it and noticed when you mash the gas the timing advance goes down to 1 degree of advance. Now I THINK that there is something wrong with that. Also it is retarding it 9 degrees fo knock. I checked it out with Auto X-Ray. I know that there is a simliar post on this board but I think there is a different problem since you cant adjust the timing on the LT1. I also checked the TPS, he has replaced the cap and rotor, plugs and wires are all from GM. I also checked the fuel injectors via ohm reading and all 8 of them are between 12.1 to 12.8 ohms. Also the fuel pressure checks out ok at 44 PSI. Any ideas??

 

Hey,

whats the knock count on it ??

What happens with you unplug the maf?

-- Joe

 

I did notice the knock count was 127 at 550 seconds of run time by revving it up and driving arount the block. Did not try to unplug the maf. I will try that when I see him tomarrow.

 

ttt

 

Might want to give www.camaroz28.com a shot.