89 fox body will not run right.

50

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

50

list of new parts are as follows spark plugs and wires, ignition module, cap and rotor, battery, and oxygen sensors

50

ok sounds like a plan not having hooked a scope up to such an old vehicle how do I do it?

9,690

well you have to take it to a shop and have them do it unless you have a 10,000 scope in your garage

2 people found this helpful.
50

i have access to a modus, and are you talking about the coil mounted on the fender or the stator in the distributor

57,905

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.

1 people found this helpful.
50

yes the spout was unplugged but the question is how do I hook up the o-scope to test the pick up coil

50

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

1 people found this helpful.
9,690

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

50

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

1 people found this helpful.
9,690

It may cost you some money but it may end up being cheaper in the long run. Hope every thing works out for you

50

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

3 people found this helpful.

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