Question:

Bet ya have about 3/4 tank of gas, right? Fords are notorious for this. I see this every weekend…”

Yes, I nodded to the tow truck driver. Going to and coming back from Las Vegas this past weekend, my 1989 full-size Bronco 302 V-8 EFI lost power / died three times in the heat. Each time, merely pulling over and waiting a half-hour or so temporarily fixed the problem.

What do I tell my mechanic to do? This hasn’t happened to me before with this vehicle before. The fuel pump isn’t the original – it was replaced a couple years ago.

Answer:

I am no mechanic (obviously), but that is what i thought, too. UNTIL I heard two tow truck drivers state that they see Fords do this all the time in the heat.

While waiting for the first tow truck, I went ahead and called a semi0friend/servicewriter at my home area Ford dealer. She immediately thought fuel pressure / fuel pump – but not “vapor lock,” either.   Sounds like an ignition module to me.  Could be a coil.  The way I’d isolate the problem is to drive it until it dies, and then check for fuel pressure and spark.  Whichever is missing will point you in the right direction. I’m betting on the module, though.  EFI systems don’t usually vapor lock because they run at fairly high pressure and the return line routes excess gas to the tank.  The supply gas is relatively cool as a result.  You could also have a fuel pump relay problem.  Good luck!

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