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1989 Chevy Beretta Rough idle

Tiny
DABAIRDS
  • MEMBER
  • 1989 CHEVROLET BERETTA
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.
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Sunday, April 19th, 2009 AT 11:36 AM

2 Replies

Tiny
LEGITIMATE007
  • 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
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Sunday, April 19th, 2009 AT 11:52 AM
Tiny
2WHITECHEVYS
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  • 2 POSTS
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.
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Sunday, May 31st, 2009 AT 2:55 PM

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