A defective thick film ignition (TFI) module can cause the engine to stall while driving, or the engine may not start. A failed TFI module will require replacement.
Average mileage: 145,000 (90,000–200,000)
Engines affected: 5.0L V8, 5.8L V8
4 people reported this problem
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Engine stalls at let off on road and at idle when hot. Excess gas consumption. Several codes detected. Cked. gas pressure at injector rail and found it was 3 times higher than specs. Changed relay and all is ok.
I have a 90 crown Vic that jus recently started acting up with these same sympoms and havent had a clue as to what it could be I sure hope this is it, I'll be fixing that this weekend and update.