Join Date: Jul 2001
Location: Cedar Rapids, Iowa, USA
Hi all, I have a 78 camaro, it has a 468 big block, it has had some bottom work done. I have have edelbrock 750 carb. I have checked the ignition, timing, the plugs, tuned the carb... but what happens is everytime I step on the gas it backfires through the carb... I have pulled off the valve covers in an attempt to see if it could be due to a bent pushrod or broken valve spring... As far as I can see there are no bent pushrods, and I can't tell about the springs unless I remove them. Before it started backfiring the car was falling flat on its face at the 2000 to 3000(roughly) rpm range. This is what instigated the carb tuning. Finally I got the power back out of the motor and then took one mild run wraped it up to about 5000 rpm, ran great, then on the way home crusing at about 2000 - 2500 rpm I romped on it and BANG!... It starts backfiring like crazy... we rechecked everything(plugs, ignition, carb, timing) and it was all perfect. Any ideas???? Help me bring my baby back to life!