| [GMCnet] back fire in 78 Birch with a 403. [message #138627] |
Thu, 11 August 2011 23:40  |
Steve Phillips
Messages: 63
Registered: February 2004
Karma:
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Member |
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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.:-( :-D
P.S., the engine just turned over 100K. Thank Steve Helena Mt
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