ENGINE REVS FAR PAST 5K UNDER HEAVY LOAD AND ...

  • Tiny
  • brettcarter
  • 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 Answers

  • Tiny
  • saturntech9
  • Expert
  • 28,243 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

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
  • Expert
  • 28,243 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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