AboutSean Halliday Expertise general auto repair,japanese,bmw,mercedes,mini cooper 1960/2009,general british cars,ford.I DO NOT work on automatic transmissions.Manual transissions i install clutches only.Many people ask me to diagnose noises from their cars,unfortunately i cannot do this unless i hear it.As you appreciate,vehicles can and will make a variety of noises.I DONT UPGRADE or fit aftermarket performace kits,parts,chips,only replacement parts.
Experience 40 years experience on all general auto repair.
Question Hi Sean,
I have a 1994 Ford Mustang,3.8 liter, in my shop.
Came in with a code of number 6 cylinder misfire.
Replaced no. 6 wire and no.6 spark plug(which was fouled).
Code came back. Removed intake to get at no.6 injector, switched with number 4 cylinder injector.
Started car, code came back, no. 6 misfire.
With the key in the run position, I have a steady stream of fuel from no. 6 injector.
I have power to all my injectors with the key on.
Number 6 is picking up a ground right?
I remove the ground wire for no. 6 , by the ECM and the fuel stopped spraying.
Here is my question, the fuel driver is in the ECM right?
Or am I looking at this wrong.
The Cam Sensor sends a signal to the ECM ,Ecm says when the injector to squirt.
In 35 years I have yet to replace an ECM on a Ford.
Any help would be appreciated.
Thanks in advance
Tom
Answer Did you do a compression check on #6 cylinder?A fouled plug would not be lack of fuel but more like not burning cleanly.Possibly burnt oil or no compression.This is more like a burnt valve.If you have a good fuel flow from all injectors then this is not the problem.A good spark rules the ignition out as well.
