F150 STARTS THEN DIES

  • Tiny
  • thunderracing07
  • 1994 Ford F-150
  • 114,000 miles

The truck will start up fine runn for a couple of seconds then die. Replaced mass air flow sensor and it did not fix. If you unplug the maf the truck will run with no issue. Put 2 different mafs in it and the problem was not fixed. It is also a 5.0L

Do you
have the same problem?
Yes
No
Monday, July 2nd, 2012 AT 6:36 PM

3 Replies

  • Tiny
  • Docfixit
  • Expert
  • 18,993 posts

Have checked for codes? Fuel pressure?

Was this
answer
helpful?
Yes
No
Monday, July 2nd, 2012 AT 7:38 PM
  • Tiny
  • thunderracing07
  • Member

I have codes 111 system check ok and 556 for fuel pump relay power. Have not checked fuel pressure. It runs fine if the maf is unplugged. You plug the mass air flow in and it immediatly dies.

Was this
answer
helpful?
Yes
No
Monday, July 2nd, 2012 AT 8:56 PM
  • Tiny
  • Docfixit
  • Expert
  • 18,993 posts

With MAF pluged in air fuel ratio is regulated if fuel pressure low will cause stalling. MAF unpluged runs full rich

Was this
answer
helpful?
Yes
No
Tuesday, July 3rd, 2012 AT 3:06 PM

Please login or register to post a reply.

Similar Questions