75 280z, Black Smoke! (carcomusa)

[k3smostwanted]

Originally Posted by carcomusa

HELP!!!! i have a 75 280z......it is fluttering, blowing black smoke out the tailpipe-smells like gas. the car is choking cutting off. we changed the plugs, MAF, computer, fuel pump, fuel regulator, plugs, tps. checked the lines-fuel pumps in fine, fuel filter is new. Are we missing anything obvious ( or hidden for that matter. If anyone has a possible solution we are all ears!!!

moved to its own thread...this is a thread for you to diagnose your own problem, if this doesnt help then you can start a new thread.

[k3smostwanted]

ECU?

your car is running EXTREMELY rich...

[DeleriousZ]

did it just start doing it? what's the story behind the car? was it sitting for a long time?

[jsb5717]

I'm sure you've checked but almost sounds like incorrect firing order. It's easy to have it wrong, change the wires, plugs, or cap, and keep it wrong.

[billszcar]

It sounds like your Timeing is off.
The same thing happend too me and i found the rottor was off 180 deg.