I have an odd problem. I had to replace my alternator on my 95 Grand Prix SE 3.1 V6 it had low voltage & hot smell.
Bought a rebuilt from Advance Auto and installed.
Engine didn't want to start had to crank a long time which is unusual finally started and took for a test drive. When I stepped on the brake pedal at a stop sign engine stalled and was hard to restart.
When ever I stepped on the brakes the engine would shut off but restarted easily, got it home and engine was hard to keep running then would not restart.
Checked spark it was weak and intermittent then no spark at all. Checked power and ground to icm that was ok, check ohms on crank sensor they were in spec. Had 1 AC volt at crank sensor wires while turning engine over so that should be ok.
Replaced icm with a Standard Motor Products and new spark plugs. Here's where it gets odd. Engine still would not start so I unplugged the new alternator and the engines started right up.
Went to Advanced and exchanged alternator for another rebuilt one. Engine started right up. Test drove 2 miles and when I was almost back I applied brakes at intersection and engine stalled, restarted easily got home engine shut off and will not restart.
I have no idea how the alternator could effect the icm or is this just a coincidence. I'm totally lost!!
I hope someone has an idea on where to look.
P.S. Voltage was 13.5 when running and the car doesn't have a remote start.
