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Shifting at high RPMs?

Tiny
BRADY HUTTON
  • MEMBER
  • 1997 PONTIAC GRAND PRIX
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 250,000 MILES
I just changed the mass air flow sensor on my car listed above, I took it for a test drive and now it doesn't want to shift until around 4,000 RPMs. Once I reach 3rd gear, I can't even get into drive no matter what speed I hit. Took it on the interstate and still couldn't run in overdrive. Thoughts? Maybe idle air sensor?
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Friday, January 27th, 2023 AT 9:59 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 48,363 POSTS
So, either the MAF sensor is defective, or you have a leak between the sensor and the throttle body so check the seal that goes on the sensor. The reading of the MAF sensor will affect the shift points. Check out the images (below). Please let us know what happens.
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Sunday, January 29th, 2023 AT 11:35 AM

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