Hi everyone. I have a 2000 Grand Prix GTP and I'm having issues.
I have the P0452 and P0171 engine codes. Here's what I did recently:
- Replaced MAF a week ago
- Replaced filler hose between filler neck and gas tank a week ago
- Ran new fuel line from tank to engine a week ago
- Gas tank, filler neck and fuel pump replaced last year
Currently idles up and down and almost stalls in park, neutral and drive at a red light. RPM's jump from 1000 down to 200 constantly. If I unplug the MAF, the car idles fine.
I also have an electrical issue that may be related. I blew the fuse to the lighter. When I replaced the fuse the lighter still didn't work. I've checked all the grounds in the engine except for the one on the starter. Heat will come out the drivers side when the temp is down to 15. Sometimes heat won't come out the drivers side and only the passenger side.
Just a note too that my valve cover gaskets do leak. Could the oil have leaked on a sensor or something that might be causing these issues? They only seem to leak when I'm going up or downhill. Yes, I know I need to replace them ASAP.
I'm wondering if I am having bad electrical issues??? If so, can anyone point me where I should start looking? I've been looking and checking many wires to date but haven't found any corroded or broken ones yet. If anyone can give me some insight on where to start looking I would greatly appreacite it. Thanks in advance!