2003 Saturn L300 Engine Revs Far Past 5k Under Heavy Load Will Shift Until

2003 SATURN L300
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BRETTCARTER
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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?
Nov 7, 2012 at 10:19 PM
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SATURNTECH9
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I would do a back pressure test sounds like a plugged cat let me know what you find.
Nov 7, 2012 at 10:28 PM
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BRETTCARTER
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both cats have less than 1 psi back pressure 5k rpm
Nov 7, 2012 at 10:56 PM
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SATURNTECH9
  • ✓ASE Certified Mechanic
  • 30,869 POSTS
  • ASE Certified Mechanic
So the test was done at both exhaust manifolds attached to the heads?
Nov 12, 2012 at 4:38 PM
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