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1996 Pontiac Bonneville throttle sticks

Tiny
KEN4832
  • MEMBER
  • 1996 PONTIAC BONNEVILLE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 109,000 MILES
My throttle sticks as soon as the car warms up. I used WD40 on the linkage, carb cleaner all around inside and out. It frees up and runs fine for awhile, then freezes up again at high rpms (3000). It becomes very tight to manipulate by hand at all possitions. Driving me nuts! Can't drive it.
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Monday, April 26th, 2010 AT 12:59 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
If you disconnect the throttle cable, is the cable sticking or the throttle plate?
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Monday, April 26th, 2010 AT 11:19 PM
Tiny
KEN4832
  • MEMBER
  • 2 POSTS
Cables are free. Plate is free now. I disconnected the TPS, (actually took it off), cleaned it out and now it may not be installed properly. Is there a trick? Code os PO122
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Tuesday, April 27th, 2010 AT 1:29 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,758 POSTS
No trick. THe PO122 indicates Throttle Position Sensor/Switch A Circuit Low Input. Either the TPS is bad, or there is an electrical problem to it. Check to make sure the connections are clean and corrosion free.

Let me know what you find.
Joe
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Tuesday, April 27th, 2010 AT 1:32 PM

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