• Tiny
  • HerschelC
  • 1994 Ford F-150
  • 160,000 miles

Has trouble starting up when warmed up. Takes several tries. Want to know why it does this?
The transmission seems to down shifts and powers down the engine as well. When going on highway speeds it jumps forward hard from the down shift and back fires sometimes. And it has been rebuilt twice same issues as well. It ran good for awhile and back to the same problem. Need help before I just pay for another rebuild?

Thursday, April 25th, 2013 AT 11:30 AM

1 Answer

  • Tiny
  • hmac300
  • Expert
  • 43,001 posts

It may be the engine causing trans problem. Check your fuel pressure and scan for codes you may have low fp. Fuel pressure should 50-60 for a 4.9L the rest 35-45 psi with key on and engine off

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Thursday, April 25th, 2013 AT 12:14 PM

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