What is causing my rpm' s to drop in my 02 grand prix GT? It will run good then I'll stop at a light then it suddenly stalls
Bad or dirty IAC. (Idle Air Control) valve. When it stalls out, can you smell gas under the hood? A leaky injector could be causing your stall issue also.
A vacuum leak can and will cause this. Open hood and listen for a hissing noise if it will idle long enough. Rubber hoses break down and crack over the years causing cracks and leaks.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts
Related Models For Sale
Used Cars For Sale