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
  • CERTIFIED EXPERT
  • 110,175 POSTS
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
Advertisement