6 CYL 155,000

1990 GMC Sierra

Tiny

jay scott

May, 26, 2006 AT 6:08 PM

Gmc sierra 1990 6 cyl 155,000

My GMC was running great until recently when I was towing a small boat on the highway. The truck sputtered at 60 mph then got worse and finally stopped. The garage who fixed it said the distributer was shot. They replaced it and now the truck has new problems. The oil pressure is much higher and there is a valve knock when under any load or going up a moderate hill, (The engine sounds as if the octane is low) It also stalls out frequently. Other than that the power in the engine is still great. What do you think? The truck was just fine before and had no stalling or knocking of any kind.

FOUND 24450 RELATED QUESTIONS

Cj Stalling When Idling

33 ANSWERS
50 IMAGES

Stalling Out

43 ANSWERS
52 IMAGES

1 Answer

Tiny

losone

May, 26, 2006 AT 6:14 PM

Have them reset the timing and it should be fine. The oil pump is driven by the distributer. How high is the pressure?

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