1991 Chevy Blazer wont run very good

1991 CHEVROLET BLAZER
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CKMARTENEY
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Engine Mechanical problem
1991 Chevy Blazer 6 cyl Four Wheel Drive Manual 150k miles

i have replaced the timing chain and gears in my 91 blazer. everything was lined up the way its supposed to be. I put the harmonic balancer on and started it up to check for leaks around the timing cover and it ran fine. After i finished putting it back together it runs like crap. It wants to back fire through the top of the motor and through the exhaust. What would cause it to do that?
Apr 16, 2009 at 1:29 PM
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BLACKOP555
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make sure the timing is set properly. it could have slipped off a bit. the valve timing has to be exact.
Apr 19, 2009 at 8:57 AM