1998 Pontiac Bonneville Q&A
1998 Pontiac Bonneville Question: car stalls when stopping
Likley bad idle air control valve. - todays tech
I have a 1997 Pontiac Bonneville with the same motor that had the same issue. How full do you fill your gas tank? I was filling mine until I couldn't put anymore in it. Found out from mechanic that all that extra gas is being drawn into the charcoal canister and it was filled with gas. Had canister changed and problem went away. Mechanic said when pump shuts off don't put anymore gas in. Don't know if you are overfilling, but if so stop. You might have to replace canister. Watch for Code P0440. If you get that, have your emissions system checked and if you explain it right and they are a good mechanic they will figure it out. - baldhead1968
The mass air flow or crankshaft position sensor may fail causing the engine to stall intermittently. Proper diagnoses will be necessary to determine the cause of any stalling condition.
car stalls after it warms up when i stop at a stoplight and has a strange smell also it sometimes it will shift hard
The 1st time I had a problem it got to where it wouldn't run ,replaced the mass airflow sensor with a rebuilt autozon sensor,it ran perfect for 6 months and it started doing it again,got another 1 ...