350TPI

Her 93 formula is giving code 33(map sensor),code 45 and 55 (O2 sensors)and 61 and a code that says the fuel system is lean.So how can the O2 sensors be rich and the system be lean?Do i start with replacing the MAP sensor and then see what it does or do i replace the O2 sensors?What are the chances that they both went bad at the same time?The MAP sensor has been throwing a code (33) for a while but the others are new.The car will die while in traffic but will restart without any problems.When it starts acting up it stumbles really bad.Any help is much appreciated as i drive a 3rd gen and have never had any fuel related problems with it.Thanks,chris.

camzaro28

have u done any work to the car lately? if so, i had similar issues ( had like 6 codes) and it was due to a pinched wire that was grounding out.
gl

Injuneer

Check the voltage on the MAP sensor. Sounds like it may be a problem. Check the harness connector, because they dry out and crumble, making a poor connection. The MAP sensor is extremely critical in a speed-density 93.

350TPI

The car hasnt had any work done to aside from me disconnecting the air pump fuse.I was told that its rare that the MAP sensors go bad thats why i was hesitant about replacing it.I hate to dump a bunch of parts in it if they wont work.Would the MAP sensor make the car think the O2 sensors are bad or maybe it made them bad?Seems like its all connected.I guess i should just replace the MAP and reset the codes and go from there.What do yall think??Thanks again,chris.