F250 460 suspect vapor lock - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

lsac · 08-01-2007, 19:54

drove for approx 5 hours in 100 degree temp. 1/4 tank of fuel.
all of sudden engine quit. could restart but if backfired and quit. after
a while it would start but would not run under load. if I didnt try to start it
for ten mins or so it would run for 30 to 60 seconds but not under load.
left vechicle sit for 3 hours. restarted it and it was back to normal and I
continued on my trip. did i do damage to the fuel pump.

lsac · 08-02-2007, 08:47

Quote:

Originally Posted by lsac

1995 ford 460 (motorhome) (mileage 30,000) drove for approx 5 hours in 100 degree temp. with less 1/4 tank of fuel when it stopped. all of sudden the engine quit. I could restart engine but it backfired and quit. after a while it would start but would not run under load. if I didnt try to start it for ten mins or so it would run for 30 to 60 seconds but not under load. left vechicle sit for 3 hours. restarted it and it was back to normal and I continued on my trip.Question is the problem a vapor lock or sometihing else and did I do damage to the fuel pump.

help

puddle jumper · 08-04-2007, 21:50

you may have vapor lock next time just loosen the fuel cap and see if it goes away.There may also be water in the fuel.

lsac · 08-09-2007, 12:44

Quote:

Originally Posted by puddle jumper

you may have vapor lock next time just loosen the fuel cap and see if it goes away.There may also be water in the fuel.

thanks puddle jumper appreciate the reply

RickMN · 08-09-2007, 20:15

Fuel injected vehicles don't get vapor lock(theoretically). Fuel under 40/lbs pressure can't vaporize. That's precisely why they put the fuel pump in the tank--so the fuel is under pressure all the way up to the injectors. However, if the fuel pump wasn't putting out enough pressure or the fuel pressure regulator was going bad, that would cause the symptoms you've got. But it wouldn't cause the backfire. You should check out the pump and the regulator

lsac · 08-10-2007, 16:17

Quote:

Originally Posted by RickMN

Fuel injected vehicles don't get vapor lock(theoretically). Fuel under 40/lbs pressure can't vaporize. That's precisely why they put the fuel pump in the tank--so the fuel is under pressure all the way up to the injectors. However, if the fuel pump wasn't putting out enough pressure or the fuel pressure regulator was going bad, that would cause the symptoms you've got. But it wouldn't cause the backfire. You should check out the pump and the regulator

Thanks Rick... I have gone on two short trips since. two hours of driving each way... and have not had any problem or notice any thing out of the way ...