Buick Regal Repair Help

Read through some of the Buick Regal questions and answers.


1994 Buick regal
Engine Size : 3.6
Question: When coming off the highway with foot on the brake at low Rpm's the engine stalls. No hissing sounds from brake booster. This will happen while costing to a stop and applying the brakes too. The RPM's seem to want to adjust but will fluctuate then car stalls.

Problem with my 1997 Buick Regal GS.
3.8L V6.
Warning lights = low traction ( sometimes).
My low traction light comes on every time I move from a stopped position. If I start off in reverse the low traction light comes on and its hard to move. I can feel the wheels trying to correct themselves (grabbing). When I am in drive the same thing. As soon as I start to accelerate the low traction comes on and I feel the grabbing.

ABS Problem with my 1996 Buick Regal 3100-SFI -V6.
ABS light on,clicking noise from front breaks some times when braking. Rubber seal inside cap of master cylinder,pops out of position,as if being pulled into master cylinder.

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How Things Work

Electronic Throttle Control System Operation

The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:

• Accelerator pedal position sensing

• Throttle positioning to meet driver and engine demands

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Common Engine Codes

Throttle Position Sensor Code P0121, P0122 and P0123

The throttle position (TP) sensor is used by the powertrain control module (PCM) to determine the throttle plate angle for various engine management systems. The TP sensor is a potentiometer type sensor with three circuits: a 5-volt reference, a low reference, and a signal. The PCM provides the TP sensor with a 5-volt reference circuit and a low reference circuit.

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