89 ford f150 loss of power

Asked by Mar 31, 2017 at 08:10 AM about the 1989 Ford F-150 S Standard Cab 4WD LB

Question type: Maintenance & Repair

I have a 89 ford f150 fuel injected 351
engine. I was driving and all of a sudden it
lost power. Will hardly stay running at an
idle. It doesnt rev up as it should. Its a 4
speed manuel and when finally get going
enough to shift its spudders so much i have
to down shift again. It will do about 35mph
tips. I changed the fuel filter and the throttle
positioning sensor but very little increase in
power. I haven't put gas in it for a week but
put a bottle of heet in the tank anywase.

3 Answers

79,155

Should check the fuel pressure, may be low indicating a bad fuel pump.

It has dual tanks and has same issue on both tanks. I havent checked the fuel pressure. I will do that when I get off work. Do you know what the pressure should be by chance?

79,155

About 35 to 42 lbs.

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