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Author Topic: SES light; throws code 43... '87 Silverado w/350  (Read 16050 times)

Offline VileZambonie

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #15 on: March 06, 2010, 06:40:43 pm »
Are you sure you were checking the timing off of the #1 cylinder wire?
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Offline RMC_SS_LDO

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #16 on: March 06, 2010, 07:07:00 pm »
Quote from: VileZambonie on March 06, 2010, 06:40:43 pm
Are you sure you were checking the timing off of the #1 cylinder wire?

Yup... 1st cylinder (fwd most) on the left bank... :-\
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Offline VileZambonie

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #17 on: March 06, 2010, 07:45:15 pm »
You are using an advance timing light? With the EST in bypass 0° is spec. The outer hub on the balancer can spin and throw off the timing mark so you may want to verify your tdc mark. The ESC wire is a single wire connector and is near the booster but it should be tan with a black tracer.
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Offline RMC_SS_LDO

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #18 on: March 07, 2010, 07:43:10 am »
Quote from: VileZambonie on March 06, 2010, 07:45:15 pm
You are using an advance timing light? With the EST in bypass 0° is spec. The outer hub on the balancer can spin and throw off the timing mark so you may want to verify your tdc mark. The ESC wire is a single wire connector and is near the booster but it should be tan with a black tracer.

This sucks...

I am now unsure if I have the right wire for the by-pass line (the one I have is brown with white stripe) and I have no clue how to verify the TDC position.  The wire I disconnected was a single wire by the booster and the only single wire I could find.  Any suggestions on back-tracking the wire?

Anyway...
I'm at the point now where I will swap the ESC today try to set the timing by light again.  If it is still running like crap at 0, I may just set it "by ear" and call it a day.

I appreciate the info!


/r
Allen
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Offline RMC_SS_LDO

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #19 on: March 07, 2010, 07:56:26 am »
Oops...

Minor update- I think I finally found the correct bypass wire.  It was taped to the harness coming out of the bulkhead and has a rubber boot on one end to help seal it.

No clue what I disconnected before (tan w/white wire) unless it was something for the cruise maybe.  I seem to recall reading somewhere that disconnecting the bypass wire will cause a code 42 which I don't think I had yesterday.

Will pick up the ESC module, set the timing correctly (as far as I can tell) and report back.

Thanks again for the patience; I know it is frustrating for folks trying to help when I'm screwing it up!!

Allen
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Offline RMC_SS_LDO

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #20 on: March 07, 2010, 02:11:41 pm »
Swapped the ESC and corrected the timing (was all hosed up- way past TDC in bypass).

Old girl is running VERY well now!  Hesitation issues are gone and no codes thrown in normal driving or under hard acceleration.


Thanks 'Vile- you were extremely helpful!


/r

Allen
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Offline VileZambonie

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Re: SES light; throws code 43... '87 Silverado w/350
« Reply #21 on: March 07, 2010, 02:56:56 pm »
Glad to help!
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10
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