1989 Chevy Beretta Rough idle

1989 CHEVROLET BERETTA
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DABAIRDS
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  • 2 POSTS
Engine Performance problem
1989 Chevy Beretta 6 cyl Automatic

I replaced the alternator and battery in an 89 Beretta. Now it idles badly, in park, but the engine races when I put it in gear. It has great accelleration and shifts okay.
Apr 19, 2009 at 4:36 AM
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LEGITIMATE007
  • ✓Experienced Mechanic
  • 5,121 POSTS
retrace your steps, you may have accidentally unplugged a vacuum hose or cracked one even. or you may need a simple throttle body cleaning, the throttle plate may be sticking. check those items and get back to me with your findings
Apr 19, 2009 at 4:52 AM
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2WHITECHEVYS
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I have a 90 Beretta GT. I'm sure you have this fixed by now but in case anyone else is reading i've been told that when the battery is disconnected the Idle Air Control valve has to be relearned.
May 31, 2009 at 7:55 AM
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