1998 Grand Am Idle Dies or Surges

GMC
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ANDY01
  • MEMBER
  • 2 POSTS
my 98 grand am runs just fine when I am pressing the gas, but when I stop and idle with my foot on the brake or it in park it will sometimes die, or surge. I replaced the spark plugs and air filter to no avail....

Any Tips?????????
Mar 10, 2006 at 5:34 AM
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MVANNESSJR
  • ✓Experienced Mechanic
  • 223 POSTS
Check for a faulty mass air flow sensor/idle air control. Double check the idle tensioner is responding properly.
Mar 10, 2006 at 4:56 PM
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DEERAYROSE
  • MEMBER
  • 25 POSTS
Vacuum leaks or plugs?
Might want to check O2 sensors to get a feel for the fuel/air ratio. If they are functioning well, they can be a good starting point to finding a problem.
Mar 25, 2006 at 5:22 PM
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Suggested Repair

Check the mass airflow sensor and idle air control valve, and confirm the idle tensioner responds properly. Also inspect for vacuum leaks and use the oxygen sensors to evaluate the fuel-air mixture.

Conversation Summary

The owner of a 1998 Grand Am says it runs normally when accelerating but sometimes dies or surges at idle in park or with the brake applied. Spark plugs and the air filter were already replaced. Replies recommend checking the mass airflow sensor, idle air control, idle tensioner response, vacuum leaks, and oxygen sensors.

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