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08-20-2007, 09:29 AM | #1 |
Senior Member
Join Date: Apr 2003
Location: Howard, Kansas USA
Posts: 1,997
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Help 97 truck popping through the exhaust
I have a 97 GMC 4X4 with the 350 motor, and it has started popping through the exhaust when not under a load. It happens more when the cruise control tries to slow it down (ie when it goes down a hill) but doesn't happen as bad when i have my foot in it.
I have tied to clean the injectors, i checked all of the plastic tubes that run to the injectors, i have checked the timing, all of the spark plugs and wires. I have sprayed ether around the motor the check for any kind of leaks. I am stumped about what to check next, could it be a distributor issue? It does't seem to miss at all and has all kinds of power, just this popping. thanks for any advise. David
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