Niece was visiting so we went for a cruise. All working perfectly and then on our highway drive home, the engine just stopped running. On the highway shoulder it cranked easily - started for a second and then stopped. While waiting for a flatbed (aprox 60 minutes), tried a few more times but same result ...started for a second and then stops....after awhile it would not even fire for a second.
Sooo.. I suspected the Holley "Red" electric fuel pump failed (or perhaps the plunger jammed) so I removed the plunger (fuel poured out)...reinstalled and tried again. Still would not start.
Took her home on a flatbed and left her until this morning. Go out to start the repair and she fires right up.... seems to be running perfectly again.
Ideas - what could have happened?
The only other small detail is that it was a hot day and my water temp strayed higher than normal (up to 230 at idle) before fan kicked on...normally fan kicks on at 210-220
Sounds like a failing coil. Easy to check. Borrow one from a friend and take a drive.
Mark III complete kit ordered 12/03/2007, received #6351 1/22/2008 Homemade mods: driver footbox extension with deadpedal and dimmer switch, widened passenger footbox, brake reservoir mounting bracket, under trunk storage box, custom dash and dash extension, heater forward box, custom glove box, under dash switch panel, Explorer motor carb conversion, first start 7/10/2010, paint by Performance Automotive 11/20/2010-5/7/2011, Graduated 11/22/2011
Thanks guys .... gotta get this sucker running.... Back to the Bricks and Woodward Dream Cruise this weekend (actually already started)
From my experience when a coil fails ...it fails "period". That said....now that you have me thinking about electrical, the module of the DUI ignition system fits the symptom perfectly (fails when hot - starts when cold). I think the module is replaceable on the DUI so I'm gonna pull it and take it to Napa for a load test.
Last September about 50 miles from home my car died. No fuel pressure and I had to get flat-bedded home. But I thought that it was just a venting problem that I'd fixed after I got home. (I was able to drive it off the flatbed. Had fuel pressure once I got home. That's one of the reasons I thought it was a venting problem. That and my vent line had melted closed.)
While on a cruise last Saturday with my daughter, again about 50 miles from home, my car died. No fuel pressure. We waited a while and the pump built enough pressue that we were able to make it home. But as soon as I got home I checked the fuel pressure and it was less than 1 psi. (Figured I was lucky to make it home.)
So yesterday I blew out all my fuel lines and replaced my fuel filter. And this morning, before a planned cruise with the local Mustang club, I checked my car and had 6 psi. Figured I was good to go.
Nope. We made it up to Park City, about 40 miles, and once again my pressure was dropping. Seems to get worse as I drive, then recovers a little after the pump cools a bit.
Anyway, this afternoon I called the Holley technical support line and told them what was going on. That I'm losing pressure but I can hear the pump running. The technician suggested that the internal relief valve may be failing and allowing the pump to recirculate without building pressure. So I'm going to try installing one of these kits: Holley Performance Products Fuel Pump Check Valve Kit*12-805 (I have a Holley gerotor pump, 12-125.)
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