So i just installed mt header collector with P/s from rb And removed my air pump etc. etc

No when Im decelerating she backfires what can alleviate this problem?

Matty from snow ridden Vancouver Island.

 

Installing a header will not cause this problem but an exhaust leak can. Did you plug the pipe that goes to the cat from the air pump?

How bad is the backfire? Like a shotgun or quieter?

 

The air tube from the back of the intake manifold cannot cause an Exhaust leak.
If there is an exhaust leak it would have to be at the flange where it bolts to the engine.

 

That's the question... Big BANG like a 10-gauge shotgun or a funky burble-burble POP-crackle noise?

 

hmm i have the pop pop pop problem lol i find it amusing
for now lol.

 

I covered the hole with terh proper covers from racing beat with super blue silicone sealant let it harden for a day then started it the backfiring is coming out the tailpipe.
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I think it cus the air pump is not on.

any idea on how this can be alleviated?

I have a manifold for holly carb waiting to go on once i can aford the modified carb from rb does anyone know if this will make a difference not only in performance but drivability?