1989 f150 5.0 V8 running on only 3 cylinders, immediate help.

Asked by Jun 09, 2014 at 10:42 AM about the 1988 Ford F-150 XLT Standard Cab 4WD SB

Question type: Maintenance & Repair

we will cut to the chase its not a leak bad hose/wire evap or throttle sensor. not a clog
in the fuel line. i believe its the fuel regulator. the fuel rail reads 36 psi so i modified my
regulator ( put a washer under the spring inside) and gained 10 psi on the fuel rail. so
far its 46 psi and it did run a little better. I am in need of what the fuel pressure should
be at the rail for my vehicle or anyone else who has experience with this problem.
Spark plugs and wires checked. i can unplug 5 of them without them affecting the
performance. so that leads to only 3 cylinders working. spark plug wires range from
6000-9000 ohms.

2 Answers

16,275

I hate to tell you this ; but, your question is ridiculous. You have the equipment to check stuff but you trying to say that you have no idea why you check stuff or what the results of what you are checking should be. Sell your equipment and use the money to pay someone that has a shop manual , the know-how......

1 of 1 people found this helpful.
24,215

Start with the Basics: Do a compression test.

Your Answer

Add photo

Related Questions

  • 1989 Ford F150 5.0 V8 13 answers

    Where is my inertia switch for the fuel pump? The shop told me it is by the parking brake. I spent 2 hours trying to find it and never did. I replaced my fuel filter and it ran for a day then star...

    1989 Ford F-150 XL Standard Cab 4WD LB

    -

    Maintenance & Repair

  • 1989 F150 Fuel problems. 11 answers

    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 ...

    1989 Ford F-150

    -

    Maintenance & Repair

  • 89 f150 overheating...STILL!!! 3 answers

    I'm hoping somebody can help me cause I'm out of ideas. My f150 302 5.0 v8 is overheating and overflow boils over. I strtd out with a new thermostat with no luck. Then I replaced the water pump.....

    1989 Ford F-150

    -

    Maintenance & Repair

  • I have a 1993 Ford F150 5.0 Runs fine until warm up 1 answer

    My Ford F150 5.0 runs fine till warm up then it shuts off but restarts fine . I did a compression test and all cylinders shoe 150 psi . Replaced TPS, O2, sensors with no results . Can anyone help ?...

    1993 Ford F-150 XLT 4WD Stepside SB

    -

    Maintenance & Repair

  • What is the horsepower of the 5.0 liter V8 1994 F150? 5 answers

    In a 1994 Ford F150 4 wheel drive, 5.0 liter v8, regular cab long bed. What is the horsepower rating?

    1994 Ford F-150

    -

    General

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 7,920
#2 dandyoun
dandyoun
Reputation 4,360
#3 tennisshoes
tennisshoes
Reputation 2,750
View All

Related Models For Sale

Used GMC Sierra 1500
824 Great Deals out of 68,200 listings starting at $2,484
Used Ford Mustang
474 Great Deals out of 45,735 listings starting at $1,999
Used Ford F-250
481 listings starting at $3,475
Used Ford Ranger
196 Great Deals out of 5,805 listings starting at $1,650
Used Jeep Wrangler
277 Great Deals out of 18,163 listings starting at $2,950

Used Cars For Sale

2017 Ford F-150 For Sale
32 Great Deals out of 128,121 listings starting at $18,445
2016 Ford F-150 For Sale
123 Great Deals out of 17,380 listings starting at $18,848
2015 Ford F-150 For Sale
186 Great Deals out of 7,904 listings starting at $17,900
2014 Ford F-150 For Sale
381 Great Deals out of 12,590 listings starting at $7,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.