87 IROC Problems....
A buddy from work has a 87 IROC 350 TPI w/122,000 that he bought last year. Did the "tune up" parts"( cap, rotor, wires,fuel filter,PCV,air filter) and drove it for about 2 months until it started running real rough and seemed lower on power and was using alot more fuel. We have now been "guessing" on parts replcement and are now pretty much without a clue and he's just about out of money!! Here is what we have replaced as of today> Replaced the throttle position sensor. Rebuilt the Fuel Press. Regulator. New MSD coil. New MAF Relay. New MAF Sensor complete. Replaced the computer w/ "new"rebuilt one. The car shows a code 33 and sometimes a 22 which I believe is the MAF and the TPS codes..both of which have been replaced. Someone said to check the intake bolts for tightness which we did and still made no change. The car starts hard and barely idles. If you can get it to stop stumbling and running rough it may sometimes get up into the 2500-3000rpm range in park. The car is not drivable the way it is. Is there any sort of oddball sensor/relay that we missed that would cause this??? Is it possible that the "ignition module" in the distibutor bad. We havent checked or replaced anything in the dist yet. Any help is greatly appreciated as we are about at our ends.
Dan in Wisconsin