1989 F150 Fuel problems.

tstansbro
615

Asked by tstansbro Apr 13, 2012 at 10:14 AM about the 1989 Ford F-150

Question type: Maintenance & Repair

I have a 1989 Ford F150 with the 5.0 fuel injected. Its not getting gas and I don't know where the problem begins. I know its getting fuel up to the fuel pump by the driver's door. but not sure about afterwards. Is there anyway I could rig a gas can to it so that it'll get fuel directly too the motor and I could get it to run? Like on the older model fords that have the fuel pump on the driver side of the motor? Or is that not possible with the fuel injection?

6 Answers

Daymon Hoffman
85

check all of the fuel lines and go to a parts house and get some Lucas and clean out your fuel injectors, and if that doesnt work then look into a new fuel pump

3 out of 3 people think this is helpful.
artr8
85

I also have an 89 ford f150 with the 5.0. Before spending a lot of money, jump the wires to the fuel pump just inside the frame rails under the driver door. Several fords that I have worked with fail at the relay controlling the fuel pumps, fore and aft. (You have two pumps, one on the rail and one in the fuel tank.) If the pump powers up, replace both the relay and the connector. Corrosion will cause the relay to fail.

7 out of 7 people think this is helpful.
tstansbro
615

Where are these wires at? And what colors are they?

9 out of 9 people think this is helpful.
Paul Potter
130

I also have a 1989 f150 five speed straight 6. I just changed the fuel pump and the filter and after driving half the day it sputtered and died out I poured a gallon of gas in the tank hopping it was out and it started right up only to die out again after about 5 miles and now it wont start. Would you know what it may be and how to fix it?

13 out of 13 people think this is helpful.
shoys2000
55

http://blog.chiltondiy.com/2012/05/how-to-tell-if-your-fuel-pump- needs-replacing/.... great troubleshooting guide

3 out of 3 people think this is helpful.
NewGuard
10

I just overcame a 1986 5.0 efi f150 randomly dying on me. The fuel pump relay (driver side firewall under the hood hinge) powered up for 2 seconds at key to run position, but the high pressure fuel pump did not run at all, and there was no fuel at the fuel rail (used a modified toothpick to press the schraeder valve open). The eec relay and computer powered up also (behind the little box to the lower right of the steering wheel on the dash). I checked that I did indeed have 12volts to the inertia cutoff switch just above the upper left side of the passenger floorboard. I ripped the radio and heater control area apart to get to the fuel tank selector switch. I had also put my battery on the charger and pulled the high pressure fuel pump, checking all the wires at the same time. I hooked the fuel pump for a split second to the batter on the charger, it sputtered out gas and seemed to run fine. I reinstalled it. I also decided to bypass the fuel tank selector switch, connecting the second (middle) slot on the left (power in) to the lower left slot (front in-tank pump). I also connected the second (middle) slot on the right (signal to fuel guage) to the lower right slot (front tank sending unit). I re-installed the battery, turned the key to the run position and was happy to hear the relays click and the high pressure pump kick on. I then had a friend turn the key off and then back to run so that I could verify the in-tank pump in the front tank also ran for 2 seconds; it did. I had my friend cycle the ignition about 8 times until the pump started to sound like it was laboring a bit. I then pushed the schraeder valve again with my toothpick and fuel shot out at pressure. The truch started perfectly and ran like a top. If I have any further problems, I am 98% sure that it is will work out to be a shorted or bad connection between ground and the high pressure pump, or 12volts in from the inertia switch (possibly shorted by the tank selector switch). I hope this helps someone else. It was quite the mental effort to go through everything methodical.

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

  • 1989 F150 fuel problem 1 answer

    I replaced the clutch and slave cylinder by sliding back trans, ran great for 2 days. Started running warm and sluggish. Had it scanned came up as short in ground wire to fuel pump. Fixed only short i...

    1989 Ford F-150

    -

    Maintenance & Repair

  • 89 f150 fuel pump problems 2 answers

    I have a 89 ford f150 xlt lariat. Has a 5.0 302 v8 efi motor. The other day i was driving and my truck just died. Wouldn't start up again. I got home and turned the ignition to the "On" position ...

    1989 Ford F-150 XLT Standard Cab 4WD SB

    -

    Maintenance & Repair

  • 89' f150 wont start 1 answer

    I have a 1989 f150 inline 6, truck has a used ECU and wire harness from same year truck w/dual tanks and 5 speed manual the truck STILL wont start. Is there something else in the cab that would not a...

    1989 Ford F-150

    -

    Maintenance & Repair

  • my 89 f150 is dieing? 2 answers

    iv got a f150 it starts great, and will run great but if you drive it for about 30-45min when you come to a stop it will die and not turn back on for like 30min. when it dies and i try and start it it...

    1989 Ford F-150 XLT Standard Cab 4WD LB

    -

    Maintenance & Repair

  • why is my truck running hot 4 answers

    I just put a new water pump on my 1989 ford f150 pickup and now its running really hot, what have I done wrong

    1989 Ford F-150

    -

    Maintenance & Repair

F-150
Looking for a Used F-150 in your area?
CarGurus has 132,163 nationwide F-150 listings starting at $1,250.
ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 dandyoun
dandyoun
Reputation 2,320
#2 OJ
OJ
Reputation 2,250
#3 Tracy Hooks
Tracy Hooks
Reputation 1,130
View All

Related Models For Sale

Used GMC Sierra 1500"
739 Great Deals out of 53,589 listings starting at $2,250

Used Cars For Sale

2015 Ford F-150 For Sale
10,002 listings
2014 Ford F-150 For Sale
168 Great Deals out of 76,036 listings starting at $16,990
2013 Ford F-150 For Sale
313 Great Deals out of 8,021 listings starting at $14,995
2012 Ford F-150 For Sale
244 Great Deals out of 6,660 listings starting at $10,000
2011 Ford F-150 For Sale
263 Great Deals out of 6,696 listings starting at $8,999