Question about 1986 Buick Regal
I have a 87 grand national(all original). runs good cold but when it warms up it more less shuts down when i start makin boost. is my fuel pump gettin weak? how much fuel pressure should it make?
First make sure you have no restrictions in exaust[converter] after you are sure of this check fuel pressure,this is critical to make sure you do not hurt pistons.
Posted on Jan 23, 2009
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Apr 12, 2013 | 1995 Buick Century
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve but always run a OBD2 fault code as well as the cleaning procedure. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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