2001 Cavalier Power Loss

[Zeifer]

Alright, I'm going to replace the catalytic converter and the MAP sensor. If that doesn't work, I'm selling. Getting to the MAP sensor is a pain in the first place. I've seen people wih the P0172 code having MAP sensor failure, so why not try it.

Update: Alright. I solved the problem. I ordered a MAP sensor from my local Advance Auto Parts, and they'll have it tomorrow. Driving home, the car decided to kill itself, so I was driving home on the shoulder with the hazard lights on at a speed no more than 30MPH. I made it home and popped the hood, inspecting the engine. The coils weren't hot, and nothing was smoking or burnt or anything. Scanned the OBD with my tool, and got the P0172 (running rich) and P0420 (catalyst efficiency below threshold) again. Revving the car lead to sputering and crapping out at about 2000 - 3000RPM (the car has no tach, so I'm only guesstimating). For kicks I took out the upper oxygen sensor and started the car again. It ran EXCELLENT. I'd like to note that one should not remove the upper oxygen sensor and rev their car to a high RPM unless you like hearing loss. I closed the hood and decided to try to see if it would make it up the nearby hill at my house. The car has power I've never seen before. I was in third gear at 55MPH going up the hill and the car wanted to GO. So, plugged converter all along, caused by the MAP sensor making the car run rich. Oddly enough the converter wasn't hot or red at all. I ordered a Magnaflow converter and I'll be expecting that in a few days. Thanks for all your input and help, Jason.

[Zeifer]

Alright. The car is fixed. It hauls ass with that new converter. MAP sensor installed and my P0172 is gone. I cleared the codes and we'll see what happens.

[CoolasIce]

Originally Posted by Zeifer

No, it isn't the converter, ..................................