back firing problem!
 

my 87 sounds like its backfiring when i sometimes stomp on it all of a sudden. it feels like a loss of power for that second. ive changed wires and plugs. my car runs good just until i stomp on it in low end range. what can it be? sometimes im thinking its coming from the engine ? inside the oil pan or somewhere. any suggestions???

Re: back firing problem!
 

Check your timing and post the results.

Could you explain this in a little more detail?

Re: back firing problem!
 

well it sounds like a pop from inside the oil pan. its pretty hard to explain. i dont think its the timing because my car idles fine. it only does it like once a day. do you guys think it might be my exhuast that isnt sealed right somewhere??

Re: back firing problem!
 

as Ieatcamaros said, check timing and post results.

Re: back firing problem!
 

Okay, I'll go out on a limb here and say you have a loose collector bolt. This will cause a slight exhaust leak, but when you back off the throttle suddenly, after punching it, it will create a small "backfire" because the sudden vacuum draws oxygen rich air into the red hot exhaust, and causes it to ignite. Very common problem when a header collector bolt is loose, or the gasket is damaged.