how do you diagnose a bad fuel pump

Asked by Feb 27, 2015 at 11:51 AM about the 2001 Ford F-150 Lariat Crew Cab 4WD SB

Question type: Maintenance & Repair

I have a 2001 F150 supper crew 4x4 that will start fine and the next time will just turn
over and over. I can cycle the ignition 3 or 4 times and it will crank and run great. This
will last a day or 2 and then it will do it again. I can recycle the ignition 2 or 3 times
and it will crank and run. It has been doing this a couple months but is now happening
more frequently I don't want to be somewhere andget stranded so I am looking for what
this may be. I am kinda thinking it is the fuel pump going out. Any help we be greatly
appreciated.

4 Answers

This could be either fuel or electrical, and that just occurred to me I am stating the obvious. What I mean is there are so many things possible, too much guesswork...maybe the anti-theft immobilizer acting up, some sensor sending no or wrong signals to the PCM. I suggest an OBDII scan, some parts houses will do it free. But if you do that, have it scanned, don't buy the firt thing the guy tells you, some know what they are doing and some not. Electrical parts can not be returned if you buy a part you don't need, and to avoid that, get the codes, they begin with a P and have four numbers. Bring the codes back here and post them and myself or somebody will be happy to help at leat point you in the right direction. OR, do a Google search "Ford OBDII PXXX" and you will get a page of sites that have causes and solutions. http://www.obd-codes.com is good and also http://engine-codes.com

1 of 1 people found this helpful.

I forgot to add the even if your CEL Check Engine Light is not on it still may have thrown a code If you do get a code, put it in a new question so we will know, and not miss it ------- For example if you get a P0230 means bad circuit, no power to fuel pump, P1233 is related to fuel pump..but remember these are only examples ..AND you do have a 4.6 engine right?

1 of 1 people found this helpful.

I agree with FordNut, to many possibles. check with Ford (on line) and see if there is a recall on that fuel filter. Just remember the codes only point you in the general direction. A lot of systems cause a problem code. You or a mechanic will have to test,diagnose,fix what ever is up stream of the code.

195

It may just be a bad fuel filter. Try to change the filter. It is an easy and cheap thing to do. Usually located undrethe gas line. When it happens, try to just turn the ignition switch on , but not all the way..Have someone listen at the gas cap(take it off), they should hear the fuel pump turn over for about 2 seconds. Also when it happends , try to spray some starter fluid into the throttle, if it runs, you will confirm a bad filter, or clogged filter.

Your Answer

Add photo

Related Questions

  • how do you diagnose a bad fuel pump 4 answers

    I have a 2001 F150 supper crew 4x4 that will start fine and the next time will just turn over and over. I can cycle the ignition 3 or 4 times and it will crank and run great. This will last a day or...

    2001 Ford F-150 Lariat Crew Cab 4WD SB

    -

    Maintenance & Repair

  • How do you troubleshoot fuel pump in a 2000 f150 pickup? 5.4, gas, fuelinj. 1 answer

    Do you drp the tank or remove the bed to replace the fuel pump? Engine turns over but doesn't fire.

    2000 Ford F-150 XL Stepside SB

    -

    Maintenance & Repair

  • How do you know if your fuel pump is bad on a 1991 e350 van 2 answers

    How can you tell if your fuel pump is bad on the Ford e350 van

    1991 Ford E-350 STD Econoline Cargo Van Extended

    -

    Maintenance & Repair

  • How do I fix a slow fuel pump 3 answers

    My 1991 F-150 pickup won't start until the pump runs for 5-10 minutes and builds up pressure enough. It this the pump or something else?

    1991 Ford F-150 STD LB

    -

    Maintenance & Repair

  • Does a fuel pump go bad from just sitting? 6 answers

    2002 Ford F150 ran great, then it sat for months without being started. Now it gets fire but wont crank. New battery, added new gas and treatment, used starting fluid and it just sputters for a few ...

    2002 Ford F-150

    -

    Maintenance & Repair

F-150

Looking for a Used F-150 in your area?

CarGurus has 195,014 nationwide F-150 listings starting at $290.

ZIP:

Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
OJ
Reputation 8,480
#2 dandyoun
dandyoun
Reputation 4,420
#3 tennisshoes
tennisshoes
Reputation 2,940
View All

Related Models For Sale

Used Chevrolet Silverado 1500
1,909 Great Deals out of 182,536 listings starting at $1,595
Used GMC Sierra 1500
779 Great Deals out of 68,576 listings starting at $1,800
Used Dodge Ram 1500
390 Great Deals out of 10,852 listings starting at $1,000
Used Ford F-250 Super Duty
319 Great Deals out of 44,666 listings starting at $1,450
Used Toyota Tundra
461 Great Deals out of 34,665 listings starting at $2,500
Used Toyota Tacoma
518 Great Deals out of 43,059 listings starting at $1,995
Used Ford Mustang
686 Great Deals out of 44,983 listings starting at $750
Used Chevrolet Tahoe
580 Great Deals out of 32,762 listings starting at $1,500
Used Ford Explorer
902 Great Deals out of 65,287 listings starting at $799
Used Ford Ranger
171 Great Deals out of 5,629 listings starting at $1,200
Used Ford F-350 Super Duty
359 Great Deals out of 24,375 listings starting at $2,588

Used Cars For Sale

2018 Ford F-150 For Sale
700 listings starting at $29,070
2017 Ford F-150 For Sale
57 Great Deals out of 125,703 listings starting at $18,199
2016 Ford F-150 For Sale
106 Great Deals out of 9,636 listings starting at $16,990
2015 Ford F-150 For Sale
222 Great Deals out of 8,745 listings starting at $15,990
2014 Ford F-150 For Sale
350 Great Deals out of 12,449 listings starting at $9,900

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.