1997 Pontiac Grand Prix Will not shift out of first gear.

Tiny
JOSADLER35
  • MEMBER
  • 1997 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 180,000 MILES
My transmission was working fine. Until I had stalling problems at stoplights and parking. I put in a new idol position sensor, though its probably an idol control valve problem. Then tryed starting it several times, once without the airfilter box and hose assembled, and several times till I discover a vaccum line from throttle body to transmisson was not hooked back up correctly. Then I test drove it and now it wont shift out of first, it will reverse.
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Friday, January 16th, 2009 AT 5:51 PM

5 Replies

Tiny
IMPALASS
  • EXPERT
Hello -

To better assist you is your model a GT, GTP, or SE. Also please tell me the size of your engine in liter and the 8th digit of your VIN.
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Friday, January 16th, 2009 AT 6:14 PM
Tiny
JOSADLER35
  • MEMBER
So sorry, I didnt know you replyed to my question, I was not on the right page. But anyway its a base Grand Prix, no SE or GT, its a 3.8L 6cyl. The 8th digit on vin is K.
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Friday, January 16th, 2009 AT 7:17 PM
Tiny
IMPALASS
  • EXPERT
Hello -

If it was shifting okay before, then I would inspect the lines that you hooked up for being plugged or damaged in some way. Are you sure they are in the correct position?

Next, when you installed the IAC, did you make sure it wasn't extended too far before installation? I have attached that below. Then you need to make sure you reset it so the PCM can reset.

INSTALL OR CONNECT

NOTE : Before installing a new idle air control valve, measure the distance that the valve is extended. The measurement should be made from the idle air control valve motor housing to end of the idle air control valve cone. The distance should be no greater than 28 mm (1-1/8 in.). If the idle air control valve cone is extended too far, adjustment is required, otherwise, damage may occur when the idle air control valve is installed. Adjust the idle air control valve by manually compressing the pintle to achieve the correct length.
1. Install the new idle air control O-Ring.
2. Install the idle air control valve in the intake manifold.
3. Install the idle air control valve (2) attaching screws.
" Tighten the idle air control valve attaching screws to 3 Nm (27 lb. In.).
4. Install the electrical connector to the idle air control valve.
5. The PCM will reset the idle air control valve whenever the ignition switch is turned ON, then OFF. Turn the ignition switch ON, then OFF.
6. Start the engine and allow the engine to reach operating temperature.

For no shift the info states a possible control valve problem, stuck or binding 1-2 shift valve. But again, if it was working okay before the IAC change, that is where I would start and make sure all is hooked up okay, vacuums and connectors. Reset the PCM.

Next, I would do what I could to go to Auto Zone (AZ) or O'Reilly's (OR) and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery and alternator.

With the codes we may be able to narrow it down more.
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Saturday, January 17th, 2009 AT 11:40 AM
Tiny
JOSADLER35
  • MEMBER
Thank you for your help. Got car running shifting problem was due to bad vacuum line connection seal from shift modulator to throttle body. Stalling was due to bad throttle body sensor not connecting to throttle butterfly, and bad idol postion sensor.
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Monday, January 19th, 2009 AT 9:39 PM
Tiny
IMPALASS
  • EXPERT
Hello -

Great to see you got it running..........

By the way, you may have some recalls on your vehicle. The dealer may fix these for free. Please contact the dealer service department, give them the VIN number of your car and have them check on these to see if they apply to you.


http://www.2carpros.com/forum/automotive_pictures/248015_Recall_1.jpg

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Tuesday, January 20th, 2009 AT 7:19 PM

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