1994 Pontiac Sunbird Engine surges

Tiny
SLUGMONKEY
  • MEMBER
  • 1994 PONTIAC SUNBIRD
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 100,000 MILES
Car starts and runs good cold til it is warmed up and drop it in drive and the Engine starts to surge like it wants to die I had the fuel pump replaced but still the same thing. I am thinking maybe a Oxygen Sensor or Map Sensor if it has one. Any info would help out alot
Saturday, May 2nd, 2009 AT 5:50 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If a vehicle idles erratically and surges (idle speed is not steady and increases and decreases), the problem may be a buildup of carbon or fuel varnish deposits in the idle speed control valve (also called the idle air control valve or IAC valve). The cure for this condition is to clean the valve with some aerosol throttle cleaner or engine top and see what happens
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Saturday, May 2nd, 2009 AT 6:04 PM

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