Rough Running

[ZTEC]

Hello z owner and drivers, I have problem w/ my 1976 5 speed fuel injected z. Well I have a rough running problem, I thought that this problem would be fix by changing the distributor cap, rotor, plug wires, and plugs which I set the gapping of each plug at .35. Ive also tried by changing the AFM and distributor, This did not work. seems like I've tried everything that should fix this problem. What cause this problem in the first place is that I drove 30miles at 85-90mph on the freeway when I got off it was running rough.

CAN ANYBODY HELP ME HELP!!

:tapemouth :tapemouth

[beandip]

How many miles on the injectors ? Have you run any cleaner through them ? Some times this does help . Have you done a compression check or a leak down. With no other info. you could have a burned valve. Gary:rambo:

[1978280z]

mine did the same thing and i didnt know what it was cause i checked everything and it ended up being that the return line to the gas tank was stopped up and the pressure was makeing run rough over 2500 rpms,..just an idea to check, maybe put a air hose up to one end and just make sure