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Rough running in gear going down road no acceleration bogs down

Tiny
ROBERT YATES
  • MEMBER
  • 2000 FORD EXPEDITION
  • 5.4L
  • V8
  • AWD
  • AUTOMATIC
  • 230,000 MILES
Will not accelerate in gear may be in limp mode got code po171 fuel system too lean (cylinder bank 1). Po442 EVAP control system small leak detected. Po174 fuel system too lean (cylinder bank 2). Did find PCV valve elbow was leaking and replaced but still no power while driving in gear or sitting still in drive and accelerating will bog down.
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Sunday, May 28th, 2017 AT 7:03 AM

3 Replies

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check the fuel pressure that will set off the two codes you are seeing. See link.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
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Sunday, May 28th, 2017 AT 8:00 AM
Tiny
ROBERT YATES
  • MEMBER
  • 2 POSTS
Low fuel pressure with key on and have low pressure running less than 5 psi with key on and less than 20 psi running.
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Sunday, May 28th, 2017 AT 10:07 AM
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
That will cause it. It should be 35-45 key on only and 28-45 running. Make sure to change filter when doing pump as well.
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Sunday, May 28th, 2017 AT 4:43 PM

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