Why won't my 2004 f 150 4.6l truck start

Asked by Boxster_4367 Jan 31, 2017 at 10:07 AM about the 2004 Ford F-150 STX Ext. Cab 4WD

Question type: Maintenance & Repair

I parked truck, the next day it would not start.  It cranks, I
disconnected my MAF and sprayed throttle, truck starts and idols but
it turns off if I plug MAF back or if I try giving it gas.

5 Answers

74,190

Try cleaning the element inside the MAF with electrical contact cleaner spraying it on gently. It a thin wire. Use no cuit-tip swap. Clean the IAC while at it. It cost nothing.

Thanks, I will clean the IAC. I turned it on today and when I tried to plug in the MAF the truck went to stall, so I unplugged it quick. It stayed on so I plugged the MAF in again, and I heard a click, and the truck kept running fine. It is turning off and on fine, but I know it will happen again. I think it sounded like a relay click. I am going to start changing relays from a parts truck. What do you think?

74,190

If you hear a click it could be the IAC. It opens and closes and should do so smoothly. See if you can feel the click on the IAC when the engine starts. The net should instruct you on how to check an IAC and what faults to look for. Also check for a faulty electrical to the IAC, clean with electrical contact cleaner. Get codes read, you could have a fault registered that is not causing the idiot light to flash.

Your Answer:

F-150

Looking for a Used F-150 in your area?

CarGurus has 15,725 nationwide F-150 listings starting at $1,712.

Postal Code:

CarGurus Experts

  • #1
    OJ
    Reputation
    42,460
  • #2
    Gene Arnett
    Reputation
    16,040
  • #3
    Rowefast
    Reputation
    15,840
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
171 Great Deals out of 5,940 listings starting at $3,995
Used GMC Sierra 1500
128 Great Deals out of 6,854 listings starting at $3,975
Used Ford F-250 Super Duty
27 Great Deals out of 1,201 listings starting at $8,995
Used Toyota Tundra
47 Great Deals out of 1,145 listings starting at $5,999
Used Toyota Tacoma
54 Great Deals out of 1,033 listings starting at $8,708
Used Dodge RAM 1500
4 Great Deals out of 80 listings starting at $4,000
Used Ford Ranger
15 Great Deals out of 1,439 listings starting at $2,888
Used Ford Mustang
49 Great Deals out of 1,268 listings starting at $4,995
Used Chevrolet Silverado 2500HD
20 Great Deals out of 1,146 listings starting at $8,999
Used GMC Sierra 2500HD
17 Great Deals out of 1,712 listings starting at $12,900
Used Ford F-350 Super Duty
36 Great Deals out of 2,603 listings starting at $8,888
Used Ford Explorer
81 Great Deals out of 2,024 listings starting at $2,999

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. Content will be removed if CarGurus becomes aware that it violates our policies.