Well, it was the fact that it missed only when hot that drew me away from the simple stuff....
Popped off the cap and the center contact inside was worn down to nuthin'... replaced the cap and rotor and shit, it still backfired. While replacing the cap I noticed some corrosion at the top of the coil. Popped off the wire and there was of corrosion at the coil electrode and inside the wire. Tried cleaning out the contact and the wire practically fell apart in my hand.. Bingo. Replaced the wire and it runs great.
Wonder if the worn out cap somehow cooked the wire, or it was just coincidence that the two bad parts were only 6 inches from each-other. Anywho, Thanks for the help guys. Brian.
Hey guys, hope someone can help me out....
>
> I have a '95 TBI pickup with a 305. It has been running great for a while
> but occasionally, it has started to backfire through the intake at low RPM
> when trying to accelerate. The rest of the time it runs fine.
> This problem has started to happen more frequently and now when its in
> its backfiring mode it will idle and run a little rough.
> It seems to be temperature related also. Doesn't do it when cold, and
> usually happens after driving on the freeway for a bit, and driving back on
> surface streets it'll often backfire. It is definatly an on-or-off problem.
> no in between...
>
> I've checked for vacume leaks, checked and cleaned the EGR valve, replaced
> the fuel filter and looked for loose electrical fittings under the hood,
> With no improvement.
>
> Also, when its running poorly it'll bog and backfire at low RPMs, run rough
> up to about 2500, then clear right up and run strong above 3000. >
> Any answers or ideas what to look for????
>
> Thanks a lot, Brian.
>
>
> --
> Brian C. Moore
>
>