2005 Pontiac Grand Prix 3.8 series 3
Asked by Dorothy Apr 28, 2021 at 08:23 PM about the Pontiac Grand Prix
Question type: Maintenance & Repair
Why is my car shutting down but will start
right back up when I put it in neutral ?
Changed fuel pump , Mass Airflow sensor ,
crankshaft sensor and it's still dying while
I'm driving . Please help I'm pulling my hair
out
5 Answers
Why are you changing parts if you don’t know the problem? What did it say when you scanned it for trouble codes? Have you gone through the electrical system to make sure grounds and connections are clean and tight? All of that is part of the trouble shooting process and should happen before replacing parts.
The things I have replaced were what the diagnostic said was wrong
Check the catalytic converter, it might be plugged up.
Glad to hear you scanned first. Lots of people replace a bunch of stuff first and then scan. What happens when you scan now? Have those codes gone or are they still there? If they're still there then that's where its important to check wiring, grounds etc. Modern auto electrical systems are super sensitive. As they age connections etc. deteriorate slightly and can cause the computer to "think" that certain components have failed when its actually the wiring that's at fault. Finding those minute faults often requires professional help but its money well spent if it solves a frustrating problem.
( HO2S ) Oxygen sensor bank 1 sensor 2 , and knock sensor is on now . Just now on my dash it said starting disabled due to throttle body. Going to clean it up or replace tomorrow. Nerve racking I tell you . Thanks or helping me . I'm trying my best
