350 loss of power - The 1947 - Present Chevrolet & GMC Truck Message Board Network

C101971 · 08-06-2018, 05:26 PM

I have run into an issue today, I was driving my truck, 71 GMC c15, 350 4 speed. When I noticed a loss in power, big time. Thought it was vapour lock but I pulled over, checked the distributor connections, they were all good. Spark plugs seem alright. Bit it was also making this God awful noise coming from the water pump I think. It sounded very different, liquidy sounding. But I had no power, rpm was bouncing everywhere. Timing seemed fine, just did the timing chain last week and it ran fine after, till now, she is acting up all the sudden.

Any ideas?

08-06-2018, 05:26 PM	#1
C101971 Registered User Join Date: Jul 2018 Location: Calgary Posts: 53	350 loss of power I have run into an issue today, I was driving my truck, 71 GMC c15, 350 4 speed. When I noticed a loss in power, big time. Thought it was vapour lock but I pulled over, checked the distributor connections, they were all good. Spark plugs seem alright. Bit it was also making this God awful noise coming from the water pump I think. It sounded very different, liquidy sounding. But I had no power, rpm was bouncing everywhere. Timing seemed fine, just did the timing chain last week and it ran fine after, till now, she is acting up all the sudden. Any ideas?



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