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?

2 of 2 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.

205

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.

1 of 1 people found this helpful.

Your Answer

F-150

Looking for a Used F-150 in your area?

CarGurus has 183,061 nationwide F-150 listings starting at $1,000.

ZIP:

Ford F-150 Experts

  • #1
    OJ
    Reputation
    8,930
  • #2
    dandyoun
    Reputation
    4,540
  • #3
    tennisshoes
    Reputation
    3,060
View All

Related Models For Sale

Used Chevrolet Silverado 1500
2,130 Great Deals out of 167,340 listings starting at $1,995
Used GMC Sierra 1500
899 Great Deals out of 65,452 listings starting at $1,995
Used Ford F-250 Super Duty
377 Great Deals out of 44,647 listings starting at $1,799
Used Dodge Ram 1500
369 Great Deals out of 10,941 listings starting at $1,500
Used Toyota Tundra
464 Great Deals out of 32,298 listings starting at $1,999
Used Toyota Tacoma
622 Great Deals out of 42,906 listings starting at $1,500
Used Ford Mustang
732 Great Deals out of 38,316 listings starting at $895
Used Chevrolet Silverado 2500HD
311 Great Deals out of 29,149 listings starting at $2,995
Used Ford F-350 Super Duty
311 Great Deals out of 24,103 listings starting at $2,488
Used Chevrolet Tahoe
654 Great Deals out of 39,509 listings starting at $1,000
Used Ford Explorer
859 Great Deals out of 63,389 listings starting at $995

Used Cars For Sale

2018 Ford F-150 For Sale
32,348 listings starting at $20,236
2017 Ford F-150 For Sale
120 Great Deals out of 80,203 listings starting at $17,990
2016 Ford F-150 For Sale
133 Great Deals out of 7,741 listings starting at $18,989
2015 Ford F-150 For Sale
295 Great Deals out of 10,715 listings starting at $14,999
2014 Ford F-150 For Sale
424 Great Deals out of 13,817 listings starting at $10,995

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.