Scanner problems
Jason Weir
jweir at worldnet.att.net
Wed Jul 1 11:19:37 GMT 1998
T Hergen wrote:
> My '92 4.3L vin W (as opposed to vin Z, the one without the balance
> shaft)
> has two knock sensors wired in parallel. There are different flavors
> of
> the 4.3L vin W that require different calibrations. One service note
> states explicity (quoting from bulletin no. 23-61-11, referring to the
>
> flavors of vin W 4.3L motors) "Without the correct calibration
> MEM-CAL,
> the engine will detonate." Of the two vin W 4.3L motors I know about,
> one
> has needle bearing (early motors) and the other has sleeve bearings.
> The
> needle bearings are more noisy resulting in the need for different
> knock
> calibrations, I think.
>
> The knock sensor locations for the vin W for more recent motors have
> changed as compared to my '92 motor. This will probably affect the
> knock
> sensitivity (and required "calibration").
>
> This info doesn't fix your problem, but it may help you figure out
> what
> to look at.
>
> Tom
I have a 91 system and the scanner doesnt like W for an engine code in
91 so hopefully that elliminates that possability but I'll check it out
anyways... thanks Jason
--
Jason Weir - 88 YJ - 258 / Howell TBI 145K and counting
Fayetteville, North Carolina
JTW Web pages at http://home.att.net/~jweir
mailto:jweir at worldnet.att.net
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