Truck was fine one day then all of a sudden it.

FREDLUONGO

MEMBER
1990 FORD F-250
167,000 MILES

Truck was fine one day then all of a sudden it would die down when you gave it gas. In neutral it revs up fine but not when in gear. I replaced the throttle pos, veh. Speed, and map sensors. Fuel pressure is good as are all vacuum lines. Tried disconnecting battery too. Had the diagnostic scan done and said system good.

6 Replies

ASEMASTER6371

MECHANIC
52,797 POSTS

What is the exact fuel pressure?

Check the back pressure on the cat converter?

Roy

Was this

answer

helpful?

Yes

No

Sunday, December 30th, 2012 AT 5:08 AM

FREDLUONGO

MEMBER
4 POSTS

Don't know exact fuel pressure but when I relieved the pressure on the fuel line manifold it squirted out hard. Was going to cut out the converter but could it go all of a sudden

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Sunday, December 30th, 2012 AT 5:19 AM

ASEMASTER6371

MECHANIC
52,797 POSTS

If the guts broke loose, it would go to the outlet and cause a huge restriction.

Get a fuel pressure gauge and verify the pressure on the fuel pump

roy

Was this

answer

helpful?

Yes

No

Sunday, December 30th, 2012 AT 5:21 AM

FREDLUONGO

MEMBER
4 POSTS

The trouble all began after I had gotten on it, maybe that blew it out. But I it ran fine a couple of times. That wouldn't happen if it was restricted. No other possibilities?

Was this

answer

helpful?

Yes

No

Sunday, December 30th, 2012 AT 6:01 AM

ASEMASTER6371