why doesn't my car not want to shift from 1 st to 2nd until it reaches 30 mph, and from 2 nd to 3 rd gear until 55 mph.

10

Asked by Aug 19, 2015 at 02:35 PM about the 1997 Pontiac Bonneville 4 Dr SE Sedan

Question type: Maintenance & Repair

The car shifted fine until I replaced the upper and lower manifold gaskets. the car accelerates great, but doesn't want to shift until the rpms are above 3000 rpm. The tps checked bad so I replaced it and the idle air solenoid. the map sensor checked out good. I would appreciate any suggestions.

3 Answers

20

Probably have a vacuum leak.

1 of 1 people found this helpful.
10

I have check the routing and replaced all the damaged hoses I could find, but it hasn't changed anything. I appreciate the input.

1 of 1 people found this helpful.
72,515

Check any and all wiring that you had to unplug and move aside to do the job. Make sure everything is plugged back in correctly and that all the connections are clean and tight. Some of these things have not been disturbed since the car was made, 18 years ago. Also inspect all the ground straps and connections. Again, make sure they're clean and tight. Is the check engine or service engine soon light on? If so, have the computer scanned. Most auto parts stores will do it for free. Post the codes and then we can help further. Check the MAP sensor for proper seating and a good electrical connection as well as the TPS (Throttle Position Sensor). The computer uses information from these 2 sensors to determine shift points on the transmission, among other things, based on engine load. HTH. -Jim

1 of 1 people found this helpful.

Your Answer

Bonneville

Looking for a Used Bonneville in your area?

CarGurus has 473 nationwide Bonneville listings starting at $2,995.

ZIP:

Pontiac Bonneville Experts

  • #1
    ticklemedaly
    Reputation
    390
  • #2
    Js08016
    Reputation
    370
  • #3
    dandyoun
    Reputation
    360
View All

Related Models For Sale

Used Pontiac Grand Prix
13 Great Deals out of 2,643 listings starting at $950
Used Chevrolet Impala
577 Great Deals out of 34,503 listings starting at $1,100
Used Pontiac Firebird
7 Great Deals out of 762 listings starting at $3,800
Used Pontiac Grand Am
1,054 listings starting at $1,500
Used Chevrolet Camaro
444 Great Deals out of 31,892 listings starting at $1,450
Used Chevrolet Monte Carlo
13 Great Deals out of 1,241 listings starting at $999
Used Buick LeSabre
5 Great Deals out of 1,670 listings starting at $899
Used Buick Regal
160 Great Deals out of 7,454 listings starting at $3,995
Used Chevrolet Malibu
1,130 Great Deals out of 62,899 listings starting at $880
Used Ford Mustang
599 Great Deals out of 39,962 listings starting at $1,895
Used Buick Park Avenue
372 listings starting at $1,495

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.