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Engine revs far past 5k under heavy load and.

Tiny
BRETTCARTER
  • MEMBER
  • 2003 SATURN L300
Engine revs far past 5k under heavy load and will not shift until slight letoff on gas pedal no codes new maf sensor, new transmission, had fuel tested and is good no misfires good fuel pressure and volume what have I missed?
Wednesday, November 7th, 2012 AT 10:19 PM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I would do a back pressure test sounds like a plugged cat let me know what you find.
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Wednesday, November 7th, 2012 AT 10:28 PM
Tiny
BRETTCARTER
  • MEMBER
  • 2 POSTS
Both cats have less than 1 psi back pressure 5k rpm
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Wednesday, November 7th, 2012 AT 10:56 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So the test was done at both exhaust manifolds attached to the heads?
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Monday, November 12th, 2012 AT 4:38 PM

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