My 99 f150 5.4L will turn over but won't crank. I can tap the relay pump comes on tap it again it goes off. When the pump is running it won't turn off. When the pump is running it still won't crank.


Asked by May 22, 2015 at 10:37 PM about the 1999 Ford F-150

Question type: Maintenance & Repair

7 Answers

you got air? u got fuel? you got fire? youre missing one of them.

1 out of 1 people think this is helpful.

Just checked we got fuel and air but no fire?


It will turn over but won't start. The fuel pump is working.


No fire to the coils?

Joshua Crowder

crankshaft positiin sensor or ignition module become suspect

1 out of 1 people think this is helpful.

ya know...thats wrong. the relay is obviously sticking.

Not utta the question but the simple stuff first. find a forum page or maybe a fb group for these trucks. see if youca nf ind the factory service manual on pdf. new bible and better than haynes or chiltons. ill never own a vehicle wo one

Your Answer

Add photo

Related Questions

  • if your truck cranks but will not start, what would be the problem? 95 answers

    STARTING PROBLEM I have a 2000 ford f150 5.4L the truck cranks but will not start some times. if i spray starter fliud into the booster in will start up. but other times the truck will start then just...

    2000 Ford F-150 Lariat Extended Cab SB


    Maintenance & Repair

  • Truck won't crank unless fuel pump shuts off 2 answers

    I have to turn the key and let the truck sit until the fuel pump cuts off. If it rains it can take an up to an hour for the fuel pump to shut off. The fuel pump is not even a year old fuel filter ha...

    1990 Ford F-150 XLT Lariat LB


    Maintenance & Repair

  • Won't start 24 answers

    Truck was running great when I got home from work. Went out next morning to start it and it cranks but won't start. Checked all fuses and fuel pump shut off. Got any ideas for me to try?

    1995 Ford F-150


    Maintenance & Repair

  • F150 won't crank 12 answers

    I was headed down the highway one day and my truck started to bog down, so I pulled over thinking it had over heated... Radiator was full so I had it towed. Replaced the fuel pump and the truck r...

    1993 Ford F-150


    Maintenance & Repair

  • My fuel pump won't come on 4 answers

    My car won't start I replaced the whole wiring harness and fuel pump but the fuel pump won't come on I checked the relay and its good whats wrong with my car plz plz plz

    2003 Ford Crown Victoria Police Interceptor


    Maintenance & Repair


Looking for a Used F-150 in your area?

CarGurus has 216,425 nationwide F-150 listings starting at $1,000.


Search Ford F-150 Questions

Ford F-150 Experts

#1 OJ
Reputation 6,010
#2 dandyoun
Reputation 3,890
#3 tennisshoes
Reputation 2,300
View All

Related Models For Sale

Used Chevrolet Silverado 1500"
2,427 Great Deals out of 143,996 listings starting at $1,995
Used GMC Sierra 1500"
1,025 Great Deals out of 56,367 listings starting at $2,400
Used Dodge Ram 1500"
512 Great Deals out of 13,856 listings starting at $995
Used Toyota Tundra"
611 Great Deals out of 26,460 listings starting at $2,500
Used Ford F-250 Super Duty"
449 Great Deals out of 42,779 listings starting at $1,000
Used Toyota Tacoma"
644 Great Deals out of 30,295 listings starting at $2,850
Used Ford F-250"
609 listings starting at $3,995
Used Ford Mustang"
721 Great Deals out of 41,404 listings starting at $900
Used Ford Ranger"
254 Great Deals out of 7,800 listings starting at $988
Used Ford Explorer"
1,312 Great Deals out of 71,769 listings starting at $300
Used Chevrolet Tahoe"
1,106 Great Deals out of 36,353 listings starting at $1,700
Used Nissan Frontier"
431 Great Deals out of 20,683 listings starting at $2,500

Used Cars For Sale

2017 Ford F-150 For Sale
6,695 listings starting at $17,015
2016 Ford F-150 For Sale
142 Great Deals out of 137,894 listings starting at $16,985
2015 Ford F-150 For Sale
238 Great Deals out of 8,951 listings starting at $17,958
2014 Ford F-150 For Sale
488 Great Deals out of 10,911 listings starting at $10,450
2013 Ford F-150 For Sale
691 Great Deals out of 14,709 listings starting at $7,727