LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

o2 sensors at work?

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Old Jan 7, 2004 | 02:10 AM
  #1  
NewbieWar's Avatar
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From: Germany
o2 sensors at work?

well my wires are arcing again i think... well anywho its not firing right again so i wanted to reset the pcm battery to make sure it was doing gas/air mixture right but i had just used the car so it was like 210* i had it on possision took out the pcm battery fuse for a few seconds put it back... turned the ignition and about 3 seconds later the idle was violently changing from 300-1700 rpms
about 15 seconds later it was normal.
i suppose its was just trying to find the right air mixture.
unless anyone else can think of a different reason.
Old Jan 7, 2004 | 02:57 AM
  #2  
InjectedSS's Avatar
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Re: o2 sensors at work?

Originally posted by NewbieWar
well my wires are arcing again i think... well anywho its not firing right again so i wanted to reset the pcm battery to make sure it was doing gas/air mixture right but i had just used the car so it was like 210* i had it on possision took out the pcm battery fuse for a few seconds put it back... turned the ignition and about 3 seconds later the idle was violently changing from 300-1700 rpms
about 15 seconds later it was normal.
i suppose its was just trying to find the right air mixture.
unless anyone else can think of a different reason.
As long as the car runs fine now your fine... Basically when resetting the ECM you loose all the data that it LEARNS over time so now it has to relearn everything so the car can idle correctly etc.
Old Jan 7, 2004 | 04:36 AM
  #3  
MentalCaseOne's Avatar
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From: Hawaii
the idle was violently changing from 300-1700 rpms
Yeeeeeeaaaahawwww!!!


Mine hasnt done that yet. But the Chiltons book describe a process to do when you disconect the batt to allow the PCM to re-learn the Idle air position...


Marvin
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