1 reply to this topic

[Eagle Spirit]

Hi,

The pumps at times will function what appears to be normal. At other times the pumps will not stop running and it is at those times when the engine does not like to run.

I do not know if the engine will not run due to too much pressure or not enough fuel pressure.

The problem is with both tanks and pumps so I do not believe the problem is inside either of the tanks.

One problem is that I just got the truck and the prior owner had at times done a little work and you know how that can be a problem. He could have done some damage to some hoses or who knows what. He had replaced the radiator and the left side exhaust manifold recently, though at different times. He thinks the problem started around the time he did the radiator. I know it dosn't make sense but things can get bumped or damaged.

What would the problem be that it could come and go?

I drove it for a few miles and I thought that maybe the problem had gone away after I replaced what appeard to be a short vacuum line by the throttle body. But the problem still comes and goes.

Now the truck is stuck till I figure the problem out.

Suggestions on a this inconsistent problem?

Thanks!

[andre 244]

ok i ad simelar prom w 1990 f150
by the way have ad 1988 to 1991 f150
pump running all the time will b hard to start and fill crakcase w oil
make sure you're oil dont have gas in it "bad 4 engine
on r side of inner fender under hood there are 2 relay on 1987 to 1991
one ingn relay other fuel pump relay mine was sticking some time
also wile yuo're there check if vacuum line on fuel regulator is ok
againd make sure the oil not full of gas i u run it may spund a bearing or other
internal prom
if only i ad 1 dollard for every ford i put appart mmm