Given that it's a ford I would say check vacuum hoses first. This is
common with broken, collapsed or "modified" vacuum hoses.
I saw this a lot in the early eighties when our local rednec....er..,
customers would remove "them damn pollution controls" usually by taking
ALL the vacuum hoses off and plugging them :-) Of course they never
seemed to get around to taking the belt off the A.I.R. pump although
they had disabled the deceleration diverter valve by removing the vacuum
hose.
The net result was retarded timing (no vacuum advance), a rich fuel
mixture (no EGR), lots of raw gas from letting the engine decelerate the
vehicle (manual tranny), and finally lots of fresh air being pumped
straight into the already overheated exhaust manifolds (KaBoom)!
Or it could be an ignition problem, check the cap for traces of spark
jumping and the plug wires if they run close to each other.
--
John Dorsey
Wauchula, FL
'49 Chevy Panel http://www.strato.net/~jrdorsey/truck.htm
'52 GMC Firetruck http://www.strato.net/~jrdorsey/fire/fire.htm
'51 Chevy suburban http://www.strato.net/~jrdorsey/burb/
RobXR250@aol.com wrote:
>
> I know that this is an off subject vehical but im sure there are some pretty
> damn good mechanics on the list that could help me out with this. I have a
> 1986 Ford Ranger that backfires throught the tailpipe. Its a manual and does
> it when i let off on the gas to up or down shift. The warmer it is, the
> louder it backfires, and if its a warm summer day, at a stoplight it will pop
> when it is idling. I put a carb kit in it and that hasnt solved it. I have
> noticed an exhaust leak just after the muffler though. If i take care of the
> leak would that stop it? What else could it be?
>
> Any help is appreaciated
>
> Rob
> oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
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