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1988 Buick Regal stall

Tiny
TY VAUGHN
  • MEMBER
  • 1988 BUICK REGAL
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 89,000 MILES
Idles irratically stalls at stoplight surges while crusing between 1400-1700rpm runs good otherwise new egr fuel pump fuel filter fuel pressure good new O2 sensor plugs wires. Help
Wednesday, August 19th, 2009 AT 12:36 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and test the TPS and MAP sensors

Could also be the following:

Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
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Thursday, August 20th, 2009 AT 2:53 AM

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