88 4.9 problems

Asked by Dec 18, 2014 at 10:17 PM about the 1988 Ford F-150 S Standard Cab LB

Question type: Maintenance & Repair

My truck does not wanna go
Above 30 mphs it struggles just to get there and
barely wants to shift into gear and also checked
the vacuum no flow to
The EGR or the throttle body idels ruff unless you
remove a few lines from the intake and idels
perfect but still in gear runs horrible no power at
all any ideas??

7 Answers

430

Maybe a clogged fuel filter. Crossed vacuum lines, poor gas?

1 of 1 people found this helpful.
430

Maybe crossed spark plug wires.

745

Ill even go as far as saying a stopped up catalytic converter if its not Tamishas responses because she hit the basics

430

Thank you

1 of 1 people found this helpful.
745

Anytime....are you a mechanic

Thanks for the answers guys and the wires are fine, the fuels good quality and funny enough that vacuum lines are fine but I get no air flow of any kind through the egr and we cleaned that and the throttle body and at this point the codes I get is for is the neutral safety switch or the computer might be bad, it's just a giant guess game with my truck

The filter is clean as well no crud in the filter and I pulled the cat pulled out the com inside and put back on but same problem zero power when in gear

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