Having surges while driving and idling.

Tiny
GMC_3500
  • 1998 GMC SIERRA

My truck is a diesel turbo 6.5 it seems to run fine but when I am driving it it seems to have a surge where the truck has more power for about 1-2 sec. And when idling it seems to also surge. Changed oil and filter. And I also changed my fuel filter. I can not figure this out as we do not know a whole lot about diesel engines.

Do you
have the same problem?
Yes
No
Friday, October 5th, 2012 AT 5:07 PM

3 Replies

Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

Injector pump may have an issue or the injectors may be clogged.

I reccomend letting a shop check it for you as it is more complicated than you think and not for a do it yourself unless you have expierence

Roy

Was this
answer
helpful?
Yes
No
Friday, October 5th, 2012 AT 5:33 PM
Tiny
GMC_3500
  • MEMBER

Ok. The vehicle is not shutting off at all. He just came in from checking the coolant pressure and he said after idling the pressure goes 20+. We suspect a blown headgasket. Could this be what is causing the problems we are having?

Was this
answer
helpful?
Yes
No
Friday, October 5th, 2012 AT 6:14 PM
Tiny
ASEMASTER6371
  • EXPERT
  • 25,554 POSTS

Absolutely. I would resolve that issue first. Make sure you check the heads closely, they are common for cracking.

Roy

Was this
answer
helpful?
Yes
No
Friday, October 5th, 2012 AT 8:24 PM

Please login or register to post a reply.

Other Engine Surge Questions