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.
71,025

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 489 nationwide Bonneville listings starting at $3,699.

ZIP:

Pontiac Bonneville Experts

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

Related Models For Sale

Used Pontiac Grand Prix
29 Great Deals out of 2,640 listings starting at $1,449
Used Chevrolet Impala
535 Great Deals out of 35,069 listings starting at $800
Used Chevrolet Monte Carlo
4 Great Deals out of 1,289 listings starting at $1,488
Used Pontiac Firebird
6 Great Deals out of 769 listings starting at $2,500
Used Chevrolet Camaro
413 Great Deals out of 30,554 listings starting at $1,450
Used Buick Park Avenue
3 Great Deals out of 397 listings starting at $1,295
Used Buick LeSabre
17 Great Deals out of 1,777 listings starting at $1,000
Used Pontiac Grand Am
1,087 listings starting at $994
Used Buick Regal
165 Great Deals out of 8,774 listings starting at $4,495
Used Honda Accord
966 Great Deals out of 59,154 listings starting at $1,099
Used Ford Mustang
537 Great Deals out of 35,432 listings starting at $1,200
Used Chevrolet Corvette
164 Great Deals out of 19,666 listings starting at $3,000

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.