why does 1007 Grand Prix shift hard?

Asked by Mar 29, 2014 at 06:06 PM about the 1997 Pontiac Grand Prix 4 Dr SE Sedan

Question type: Maintenance & Repair

just replaced air mass sensor and throttle positioning sensor, now the vehicle will not shift out of 1st untill approx. 30 mph and rpms at around3500, second shift comes at aproximately 55 mph.

2 Answers

95,075

Did you reset the ECM?

1 of 1 people found this helpful.
11,405

Manifold air pressure (MAP) sensor? Any codes?

1 of 1 people found this helpful.

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