C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1991 L-98 miss (again)

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Old Mar 12, 2004 | 04:52 PM
  #1  
sdaztecs's Avatar
sdaztecs
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From: Chandler AZ
Default 1991 L-98 miss (again)

Does anyone know of any components that won't throw a code? I have a bad miss. The car runs great when it's cold, then when the computer goes into closed loop it misses. No codes are thrown. I've posted on this site many times and the help has been great. I'm at a loss, any ideas would be appreciated. Thanks
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Old Mar 12, 2004 | 05:56 PM
  #2  
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Pete K
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Default Re: 1991 L-98 miss (sdaztecs)

I did not see this post before but did you check the injectors. I had a similar problem and the injector swap fixed this. Ohm test first. Quick and easy.
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Old Mar 12, 2004 | 05:56 PM
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JAKE
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From: Kempner Texas
Default Re: 1991 L-98 miss (sdaztecs)

I know fo two.

The 02 won't throw a code and a broken/disconnected MAF wire won't either.

Jake
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Old Mar 12, 2004 | 07:25 PM
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Sam Lam
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From: St. Charles, MO Route 66 Corvette Club
Default Re: 1991 L-98 miss (sdaztecs)

Disconnect each injector and check the resistance between the two posts in the top of the injector. You should see something in the 16 to 17 ohms range.....if the injector is good (not shorted in the coil). If you see readings in the 11 to 14 range, the injector is shorted. A shorted injector will cause your problems and your stock injectors do not have a reputation for reliability!
Another item to check is for a static or lazy O2 sensor. You will need a scan tool or an wiring adaptor (available from MAD for about $12).


[Modified by Sam Lam, 6:28 PM 3/12/2004]
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