Diagnosing GM efi..

[peter paul fenske]

Howday

Well that is high, huge vacum leak, injector not firing,
low fuel pressure, clogged fuel filter, mismatched cal.

For the blm to creep up that o2 must be working
>>scanner, the BLM was up to 158, 

The default MAF not working is a crude N-alpha
Based on constants using TPS and RPM

Naturally if BLM is outa wack the constants
aren't gonna work well, My vette 88 cal
runs nice with MAF disconnected albeit a bit rich.
>
>>I have also read that the TPI's actually run
>>quite well with the MAF unplugged (TPI engine
>>swapping, by JTR).  Now, not only does this
>>seem to not really apply to me, but how could
>>this even work well? 

>Beleive that applies to the 165's 86-89 ecms.

Actually the default N alpha only sets when
MAF is bad. Software mode is still operational.
Not quite backup mode.

GL:peter

>Called limp home mode..
>>
>>Christopher Bruno
>> Car is currently wearing cone shaped 'bra' and facing
>> corner for running so poorly...
>
>Cars hate Modonna clothing
>Cheers
>Bruce
>
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