2002 Ford F150 need help

90,000 MILES • V8 • 4WD • AUTOMATIC
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ASHGIRL_235
  • MEMBER
  • 1 POST
check engien light is on pluged in home compuer says po401 egr flow insufficient new egr valve
Aug 28, 2008 at 1:31 PM
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BLACKOP555
  • ✓Experienced Mechanic
  • 10,386 POSTS
first thing to do is to clean out the EGR ports on the manifold. or the tube that leads to the manifold and will need a good cleaning, you can turn the engine on and blow it out, reclean turn on.

the exhaust may be hot coming out of it.

next check to see if its getting sufficent vaccum. and see if the dpfe/evp sensors are showing the proper specifications.
Aug 28, 2008 at 2:40 PM
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