1998 Pontiac Firebird 1998 Firebird rough idle?

1998 PONTIAC FIREBIRD
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DIMI0155
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  • 1 POST
Engine Performance problem
1998 Pontiac Firebird 6 cyl Two Wheel Drive 61,000 miles

Usually, when I'm at a stoplight my 98 firebird's battery gauge flickers back and forth (from all the way into the yellow/orange to normal) making it have a rough idle. If I rev it up alittle, the tac will stay at 2rpm and gradually go down back to normal idle, which isn't right-way too high.
Any suggestions?

Thanks!
Sep 16, 2009 at 2:29 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Have the alternator tested. Chances are the voltage regulator is bad. Most parts stores will do it for free.
Sep 24, 2009 at 4:28 AM
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