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Re: [GMCnet] back fire in 78 Birch with a 403. [message #138794 is a reply to message #138627]

Fri, 12 August 2011 23:22

Bob de Kruyff

Messages: 4260
Registered: January 2004
Location: Chandler, AZ

Karma:

Senior Member

Steve Phillips wrote on Thu, 11 August 2011 22:40

Hi
Need help with a backfire problem. I was on a short trip with my coach
when it started to backfire threw the crab.It seemed to be worse when
under power like going up a hill. I replaced plugs and wires checked
timing and had to advance timing about 10 deg.and it would run a low
speed then die. Checked vac and it seemed to be normal.but it still dies
under a little power.

I am about to give up and and blame the timing chain. which i really
hope it is not the prob.

I hope someone on the net that has had this prob..and found a
CURE. Sad

P.S., the engine just turned over 100K. Thank Steve Helena Mt
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Don't discount the distributor module.

Bob de Kruyff
78 Eleganza
Chandler, AZ

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[Message index]

		[GMCnet] back fire in 78 Birch with a 403. By: Steve Phillips on Thu, 11 August 2011 23:40
		Re: [GMCnet] back fire in 78 Birch with a 403. By: jimk on Thu, 11 August 2011 23:47
		Re: [GMCnet] back fire in 78 Birch with a 403. By: Steven Ferguson on Fri, 12 August 2011 06:55
		Re: [GMCnet] back fire in 78 Birch with a 403. By: Bob de Kruyff on Fri, 12 August 2011 23:22

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