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Reduced power

Tiny
WYATT HICKS
  • MEMBER
  • 2008 PONTIAC G6
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 137,000 MILES
When I get into my car and start driving my car will shift very rough and it will jerk the car around. After I start getting down the road when I get to about forty five mph, the car will go to really high revs and will not shift until I let go of the gas, and when it shifts slowing push it to accurate. Those are the main problems but the car is also very sluggish and it takes a long time to get up to speed.
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Wednesday, November 1st, 2017 AT 9:26 PM

2 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Sounds like you could have a plugged catalytic converter.
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Thursday, November 2nd, 2017 AT 12:58 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
If the catalytic converter is partially plugged it lowers the vacuum the engine can pull so the computer think it is going up a steep hill hence the late shifts.

Here is a guide to help you determine and confirm the problem:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please let us know what happens so it will help others.

Cheers, Ken
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Thursday, November 2nd, 2017 AT 6:35 PM

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