89 fox body will not run right.
Asked by Mitchell Sep 24, 2013 at 09:24 PM about the 1989 Ford Mustang GT Convertible RWD
Question type: Maintenance & Repair
my 89 fox body idles right and runs right until it gets above 2 grand then it sounds like it is backfiring and looses all power I have had 3 people set the timing including one guy who restabbed the distributor, which really helped, but it still wont run right. what could my problem be? btw the car has a b303 cam.
20 Answers
list of new parts are as follows spark plugs and wires, ignition module, cap and rotor, battery, and oxygen sensors
ok sounds like a plan not having hooked a scope up to such an old vehicle how do I do it?
well you have to take it to a shop and have them do it unless you have a 10,000 scope in your garage
sounds like the coil breaking down.
i have access to a modus, and are you talking about the coil mounted on the fender or the stator in the distributor
i was speaking of the external coil.
Did anyone think to unplug the SPOUT connector before setting the timing? If so, the E-coil breaking down is a logical guess but the correct method to diag this one is with an oscilloscope and an old-timer that knows how to read it.
yes the spout was unplugged but the question is how do I hook up the o-scope to test the pick up coil
ok went ahead and replaced the distributor but it is still stutters. i did find out that one of the coolant temp sensors was out replaced it but the car still stutters. oh forgot to say the car used to be an 87 but now has maf
you are best off to bring it in and have it scoped other wise you are going to through money aftr money at it and find out it was something simple that every one of us are over looking. I am a back yard mechanic my self and some times you need the right equipment to figure stuff out
yes it is an 87 with an 89 comp and yeah took it to a 80 model tech so he can check the computer and everything
It may cost you some money but it may end up being cheaper in the long run. Hope every thing works out for you
ok figured out the problem it was very small pieces of rust clogging the pressure line plus it was clogging the fuel pump bought a new fuel tank and pump and the problem went away thanks for the ideas