Hey guys I've been having trouble with my 1987 tuneport. When I first start it when it is cold, the car rips 2 gears, but when it starts warming up it loses power. I've checked everything and replaced alot of parts! It doesnt overheat but really loses power the more you drive it. I pluged it up to a computer and got mass air #33, spark timming #42 and Burn off #36 for codes. I've tryed everthing. If anyone has had these problems please fill me in with any possibilities of what it might be. Any info would be helpful! Thanks

 

it is running off the open loop presets when its cold, which is why it gets slow when hot. the burnoff and maf codes are related, and the timing could be thrown off by the maf not reading correctly. i would test the maf burnoff relay (cant tell you how though), or replace it. also get a can of maf sensor cleaner and clean the maf. you may need to remove the screen to clean it well. after that is done, run the engine until its up to temp. jump terminals a and b on the aldl (plug on bottom right of driver's side dash kick panel, above throttle). the terminals are the upper right 2. check the base timing of the ignition, should be 6*-8*. clear the codes and run the car to see how it performs. if it doesnt work, or if you need a more in depth procedure, feel free to ask. and for reference:

 

The engine seems to lose power when it is warmed up, which indicates that the problem is taking place when the ECM switches to closed loop, which in turn points to a sensor problem. You did not mention what you have done to fix the problem, so we go from the beginning.
Code 33. ECM does not see the MAF sensor, could be bad wiring or connectors, wires open or shorted to each other or to ground, or bad ECM (unlikely)
Code 36. ECM not getting expected condition from MAF burn off circuit. Bad fuse, bad burn off relay, bad or shorted wiring, bad MAF
Code 42. ECM having problems communicating with the ICM. Defective wiring or connectors, open or shorted wiring, bad ICM
Have you changed/cleaned the MAF, or at least checked the wiring from MAF to ECM?