2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Rough idle

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Old May 19, 2011 | 11:01 PM
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Texas_Turbo7's Avatar
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From: Garland, Tx
Rough idle

So today I took off the UIM to replace the Pulsation damper, and after putting everything back together my Fc it idles like crap. I found one vacuum leak and it idles better. Any other leaks that causes a rough idle? BTW it's around 500 rpms
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Old May 19, 2011 | 11:33 PM
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From: Gulf Breeze, FL
It's obviously because of something you removed and left unconnected, how are we supposed to know what's wrong?

Take the UIM back off and double check all of the lines.

Did you use a NEW intake gasket?
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Old May 19, 2011 | 11:47 PM
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Texas_Turbo7's Avatar
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Yes, i used a new oem gasket. It drives smooth, but idles like crap.

In the morning I'll double check every thing and take off the UIM again.
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Old May 19, 2011 | 11:51 PM
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From: phoenix, az
Originally Posted by Texas_Turbo7
Yes, i used a new oem gasket. It drives smooth, but idles like crap.

In the morning I'll double check every thing and take off the UIM again.
then replace the gasket, dont reuse it.
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Old May 19, 2011 | 11:54 PM
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If it was coming from the UIM ,you would be able to feel the air being sucked in?
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Old May 21, 2011 | 02:00 AM
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Fixed it. I didn't know you weren't suppose to use copper gasket sealer...
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