Challenger

I just put a rebuilt weber 32/36 on my 85' 22r 2wd and it runs fine except when i'm coasting down a hill then it makes popping backfiring sounds. I checked the timing and its good and the carb is set correct. Any ideas?

rokblok

iTrader: (1)

Generally speaking, backfiring on deceleration is caused by excess fuel(too rich), that is in the exhaust after combustion, igniting. So lean it out a bit and try that.

Backfiring on accel or steady throttle can be timing or to lean. To lean causes the fuel to ignite easier and faster, and the intake port/manifold will get hot spots igniting the fuel before the spark plug can do it. This is my experience anyway...

Challenger

I leaned it down and no more backfiring. Thanks.

rokblok

iTrader: (1)

You're welcome. Glad it helped.