1997 GMC C1500 engine

1997 GMC C1500
137,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
MARCREDING
  • MEMBER
  • 1 POST
when im on the highway driving passing up another car when i give it gas the engine is pinging or something it sounds marbles in the engine. It has new plugs, wires, cap, rotor, could it be my injectors not spraying right
Oct 31, 2008 at 11:22 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
The problem can be from cheap low octane gas. Try using the best you can get and see if that helps. If it doesn't, have the knock sensor checked.

Let me know if you have any other questions.

Joe
Dec 15, 2008 at 4:38 PM
Avatar
KARENCAREN
  • MEMBER
  • 72 POSTS
Hey what type of octane do you use? Get good octane gas. It will help your car performance.
Dec 16, 2008 at 7:55 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.