Diagnosing GM efi..

Bruce Plecan nacelp at bright.net
Thu Jun 18 01:56:40 GMT 1998


-----Original Message-----
Subject: Re: Diagnosing GM efi..


>For the blm to creep up that o2 must be working
>>>scanner, the BLM was up to 158, 
>
One exception to this is silicone poisioning.  What can
"happen" is that the O2 sensor will develope a limited
voltage, ie .8 then .7 then .6 then .5 .4.3 as it dies, so
it looks lean, when the O2 dies.  This can take weeks
and look like a vac leak getting worse.  Hada a turbo
Buick v-6 drive me around the bend while it did this..
Owner used silicone on a intercooler hose, when he
flushed the cooler out.  
Cheers
Bruce




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