Shifting at high RPMs?

1997 PONTIAC GRAND PRIX
250,000 MILES • 3.8L • V6 • 2WD • AUTOMATIC
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BRADY HUTTON
  • MEMBER
  • 1 POST
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?
Jan 27, 2023 at 1:59 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,456 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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Jan 29, 2023 at 3:35 AM
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