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Saturn LW300 will not accelerate, dies

Tiny
JETWRNCH
  • MEMBER
  • 2002 SATURN
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 130 MILES
No imediate DTCs. Eventualy throws Trans Control Module requested MIL after several start/run cycles. Pending DTC: VSS A circuit low voltage. Engine will not accelerate and eventually dies if the throttle is depressed and held. Rough idle. Rolling engine with throttle depressed, but does not roll at idle. MAF checks good with scanner. No vacuum leaks found. Fuel pressure is good and steady. Engine starts imediatley. CPS replaced 6 months ago. Thanks!
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Friday, April 29th, 2011 AT 7:44 AM

3 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
I need the exact code numbers not the code descriptions?Have you had the exhaust back pressure tested yet?
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Friday, April 29th, 2011 AT 8:22 AM
Tiny
JETWRNCH
  • MEMBER
  • 2 POSTS
The catalytic converter is clogged. Vacuum read 5-7hg at idle. I disconnected the exhaust at the manifold and the engine ran fine. Thanks for the timely and accurate reply!
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Saturday, April 30th, 2011 AT 8:19 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Your welcome that's what were here for let me know if you have anymore questions.
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Saturday, April 30th, 2011 AT 5:43 PM

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