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What all can cause misses & sluttering after 2000 RPM?

Tiny
HNC
  • MEMBER
  • 1998 FORD EXPEDITION
  • 165,000 MILES
I've changed the plugs, plug wires, coil packs, head gasket, cleaned the injectors n all !

it feels like it's sufforcating to mainly go up a hill !
Thursday, January 19th, 2012 AT 7:50 PM

4 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Have exhaust back pressure checked may have restricted CAT
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Thursday, January 19th, 2012 AT 7:57 PM
Tiny
HNC
  • MEMBER
  • 2 POSTS
Last year I had a bit of the same issue and the guy at the muffler shop recomended I change the catalytic converters which I did n then found out it was the fuel pump

but I remember also that he put on universal catalytic converters that only have one housing on each side instead of the 2 like the original

could that be the problem?
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Thursday, January 19th, 2012 AT 8:33 PM
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
The test will tell also maybe good to check fuel pressure. Non OEM Cat tend to fail is check engine light coming on?
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Thursday, January 19th, 2012 AT 8:56 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Does it start on spray in the intake?
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Thursday, January 19th, 2012 AT 9:02 PM

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