i have a 1986 z28 or atleast that is the titled year come to find out most of the parts come back as an 85 model year! i have had all sorts of electrical problems, mainly in the compute/emmisions area! i purchased a new carb(quadrajet),computer,map sensor and about a dozen other sensors and the car still won't run right! it seems no one can tell me why the car won't get over two grand with my foot flat on the floor! i have replaced all the parts in the distibutor and i am fed up with all the electronic B.S.! any and all suggetions welcome and will be appreciated. hurry before i lose control and jerk all the B.S. off and go old school on it's asz!

 

did you set the various sensors and solenoids in the carb correctly?

 

Cat is probably clogged/melted.

Also, could be tons of ignition misfire (which causes the cat to clog as well).

Might also be fuel pump on its very last leg, or the carb is seriously out of whack. But 2000 rpm is very low. Unless you're seriously flooded. Is it blowing smoke out the exhaust during this (super rich), or is it popping and spitting through the carb (super lean)? Or is gurgling (clogged cat)?

The 86 really doesn't use much electronics. I have one. They do however have a TON of vacuum lines. But, even if all of them are off, it'll still run better than what you say yours is. The carb is still mostly an old fashioned carb, but has a small bit of trim ability for light loads. This leads me to the cat being the problem.

Good Luck!

 

I'm thinking the same thing! Sounds like your just throughing parts at the car without knowing whats wrong. Try disconnecting the "Y" pipe at the exhaust manifold and see it it will rev. freely.

 

Pull the Y pipe off yet??

 

i think he drove his car off a cliff