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

Always lean and in open loop??

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Old Mar 21, 2003 | 04:05 PM
  #21  
sturtzy85L98's Avatar
sturtzy85L98
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From: Boone Iowa
Default Re: NEED HELP!!!!!!!!!!!!1 (1_piece_at_a_time)

Revving the motor, I can get the o2 reading to go to 460mv and then it drops right back down to 456mv. Always the same with no jumping?????????

I grounded the ecm side of the sensor and with the car off, key on, it reads 443mv grounded and not grounded. Now I am gonna start chasing wires.

Thanks guys

Sturtzy
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Old Mar 21, 2003 | 04:27 PM
  #22  
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sturtzy85L98
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Default Re: NEED HELP!!!!!!!!!!!!1 (sturtzy85L98)

I followed the procedure in my shop manual, grounding the ECM side and going to field service mode. When I start the car I still get 456mv with the o2 sensor unhooked and grounded.

Apparantly the ECM is getting no info from the sensor.

Sturtzy
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Old Mar 21, 2003 | 07:27 PM
  #23  
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Default Re: NEED HELP!!!!!!!!!!!!1 (sturtzy85L98)

Problem solved. Found 3 wires that needed grounded and now the car runs great.

Thanks for the advice everyone. Saved me alot of cash.

Sturtzy
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Old Mar 22, 2003 | 03:50 PM
  #24  
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Default Re: NEED HELP!!!!!!!!!!!!1 (sturtzy85L98)

What were the three wires you found ungrounded?? I'm encountering the same problem!
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