1988 f150 stumped

Asked by Feb 21, 2016 at 06:30 PM about the 1988 Ford F-150 S Standard Cab LB

Question type: Maintenance & Repair

ok I have a 1988 f150 I've had it for about two
years and it's been doing the same thing only
works during the summer it cranks up and runs
fine but after about 20 minutes it will cut off and
he will here the pumps are muffled 20 minutes
later you will hear the pumps sound like they are
supposed to and then it will crank up as if nothing
ever happened runs fine on the interstate does it
mostly when I sitting idle for too long I have
replaced the bull fuel pump high pressure and low
pressure new fuel pressure regulator new
distributor new thermostat and thermostat sensor
I have also straight wired the high pressure pump
and hook it to a toggle switch today still no change
I'm thinking of doing the same thing to the low
pressure pump tomorrow but I have so much time
and money into the truck I figure why not see if
somebody knows something I'm not thinking of
any help is appreciated thanks

3 Answers

5,525

First findout if in fact it's fuel related issue by checking fuel pressure. What size engine do u have

v8 302 fuel pressure is fine when its running but when it cuts off fuel pressure diminishes

5,525

How did u wire the main pump. There's a fuel relay and from there it goes to the enertia switch and then to the pumps. If one of those is not operating properly and u only direct wired one pump, the otherone will not work. I would go back to original wiring and check the relay and enertia switch first

Your Answer

Add photo

Related Questions

  • 88 f150 4.9 straight 6 stalling when engine warm 4 answers

    I start the truck runs okay then when it gets warmed up the rpms start bouncing around give it gas to try to save it and it ends up sputtering out. fuel pumps are engaging already drained tank complet...

    1988 Ford F-150 XLT Standard Cab LB

    -

    Maintenance & Repair

  • Fuel issue has me stumped!!! 5 answers

    1989 f150 4.9l 2wd lariat with dual tanks I am a first-time poster, tapping out to a fuel issue! I was driving down the road, truck wasn't getting enough gas sputtered badly then died. Got it towed...

    1989 Ford F-150 XLT Standard Cab SB

    -

    Maintenance & Repair

  • we have 1988 F-150 truck and it gets warm at normal temp. & as we drive down the road it quits running, read on. 5 answers

    we have a f-150 ford truck 1988 & when it gets warm it quits running on us & we don't make it home or any were my husband has to wait about 10 or 15 minutes then we can get down the road a little far...

    1988 Ford F-150

    -

    Maintenance & Repair

  • '77 F150 3 answers

    Bought a '77 F150 w/306cyl....ran good, but battery was dead...replaced it. Came home following day and went to start it; nothing...jumped it off with cables...had to let it charge (when i bought the...

    1977 Ford F-150

    -

    Maintenance & Repair

  • Has me stumped 5 answers

    Changed power steering pump on 99 v6 explorer. New pump whines badly. Returned pump and second one is worse than first. Even worse than original. Pressed on pulley correctly and is alligned. Bled...

    1999 Ford Explorer

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 212,656 nationwide F-150 listings starting at $1,000.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 6,910
#2 dandyoun
dandyoun
Reputation 4,180
#3 tennisshoes
tennisshoes
Reputation 2,510
View All

Related Models For Sale

Used GMC Sierra 1500
927 Great Deals out of 62,271 listings starting at $1,395
Used Ford F-250
520 listings starting at $3,500
Used Ford Mustang
396 Great Deals out of 44,403 listings starting at $1,000
Used Ford Ranger
209 Great Deals out of 6,719 listings starting at $1,450
Used Jeep Wrangler
441 Great Deals out of 19,188 listings starting at $2,994

Used Cars For Sale

2017 Ford F-150 For Sale
3 Great Deals out of 100,942 listings starting at $18,940
2016 Ford F-150 For Sale
196 Great Deals out of 43,534 listings starting at $16,995
2015 Ford F-150 For Sale
201 Great Deals out of 7,337 listings starting at $17,480
2014 Ford F-150 For Sale
464 Great Deals out of 11,869 listings starting at $10,700