Spark problem from hell
I have a 91 bronco 351w efi. I have been having this problem where my engine will just shut off. I checked my fuel, and have plenty of pressure at the injector rail. Then I checked for spark, and bingo no spark.
It is an intermiting problem. It runs great for a few days, then all of a sudden it just shuts off, like I turned the key off. No chug, no sputter.
So far, I have replaces the coil, distrubitor (complete), TFI, EEC,Fuel pump relay, alternator, new leads on the battery, TPS, plugs, wires, rotor, and cap.
After each piece was replaced, I would get it to start, and run for a few days, then it would act up again.
The last thing I am looking at if the ignition suppression resistor.
When I turn the key on, I get @12v comming out of the coil, when I crank the engine, it drops to @6v. Was told it could be the resistor.
Before I tear appart the wireing on the engine to find it, I was hopeing for some advice.