If you know for a fact you have no vac leaks, the next step would be to check the idle air control valve. It should be mounted in the throttle body. It could be stuck open.
The computer controls idle speed by regulating air flow into the throttle body.
The throttle plate could also be stuck open. An eighth of an inch would do it. Make sure the throttle and cruise control cables are not pulling on the throttle plate.
Vac leaks could include the PCV valve and the EGR valve.
SOURCE: 1995 Buick Lesabre custom stalling and idle
did you clean the idle speed control air bypass valve?, u do this by spraying carb spray into the intake while the engine is held at hi idle so it won't stall, use up about half the can, then shut down and disconnect battery for 5 minutes to reset system idle learn, drive the car for a few days and let me know if the problem is fixed.
SOURCE: Buick Regal dying
You have a problem in the fuel pump relay circuit for sure then. I'm betting the relay, but it could be that dropping resistor.
SOURCE: 1996 buick regal 3.8L. Rear brakes loud thumping
Check for leaks in the brake lines and calipers or brake cylinders. If leaking have it repaired right away its not safe. Change the brake fluid, take the old fluid out add new fluid or have it professionally done.
SOURCE: 2003 Buick Regal Service Engine Soon light.
The error that I'm showing for error code P1133 is
P1133 Heated Oxygen Sensor (HO2S) insufficient switching bank 1 sensor 1(Rear Bank). I would suggest having both of your Oxygen Sensors replaced if you haven't already had that done. Hope this helps. Thanks for an honest rating and for using FixYa.
347 views
Usually answered in minutes!
×