Tops out at 3,500 RPM's and top speed of thirty mph

Tiny
1CRAZYTAZMAN
  • MEMBER
  • 2006 CHEVROLET UPLANDER
  • 3.5L
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 86,000 MILES
My vehicle had a clogged catalytic converter, change that plus both o2 sensors. Still have the issue no matter the gear it is in (park, drive and neutral) will not go past 3,500 rpm's. Has good full pressure. Any ideas would be helpful.
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Wednesday, April 10th, 2019 AT 8:10 PM

3 Replies

Tiny
SCGRANTURISMO
  • EXPERT
Hello,

This sounds like your vehicle is in "limp mode". When ever something goes wrong with a system that has the potential to do major damage to your vehicle's power train components or produce excessive emissions than your vehicle will go into limp mode so you can't do any damage, but get your vehicle to a repair facility to have it fixed. I have included a link for down below to go to:

https://www.2carpros.com/articles/reduced-power-limp-mode

Please go through the guide and get back to us with what you are able to find out please.

Thanks,
Alex
2CarPros
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Wednesday, April 10th, 2019 AT 8:20 PM
Tiny
1CRAZYTAZMAN
  • MEMBER
After replacing the catalytic converter and O2 sensors since having disconnecting negative battery erasing the check engine codes. I no longer have any codes. It was running great went to store four miles away came out went to go back home when it went into limp mode. The only code at time was clogged catalytic converter. So is why I replaced. Also while was there replaced both O2 sensors. Cleaned the throttle bore. There is no knocking, no funny odors or noises no stalling. Very smooth idle even smooth when rev up engine except the fact that it limits at 3,500 rpm's. I do not have a lot of money to be changing unnecessary parts. But would love to get it running again.
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Thursday, April 11th, 2019 AT 8:21 AM
Tiny
SCGRANTURISMO
  • EXPERT
Hello,

I have included everything I could find on "limp mode" for your vehicle in the diagrams down below. Please go through this material and get back to us with what you are able to find out please.

Thanks,
Alex
2CarPros
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Saturday, April 13th, 2019 AT 12:42 AM

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