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#11

06-17-2009, 03:55 PM

SWANNERZ

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Quote:

Originally Posted by mikeinwi

did you read the link swartlkk posted? at the bottom of the post says if it is the balance shaft it can be corrected by installing a timing chain tensioner.

Whoops! K got it, but there isn't any "rattle" going on. Just a quick hesitation/stall like nuisance going on around the higher rpm's listed.

#12

06-17-2009, 06:40 PM

swartlkk

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The rattle may not be enough that you can hear it, but enough that it makes the knock sensor think detonation is occurring.

#13

06-17-2009, 09:01 PM

SWANNERZ

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Quote:

Originally Posted by swartlkk

If it is always from around 1800-2200RPM consistently, it is possible that this is resulting from torsional vibration in the balance shaft that is triggering the knock sensor, retarding timing and hindering performance.

This is documented in TSB 03-06-01-024.

I'm assuming if you bring your blazer in for this TSB 03-06-01-024, and they find it to be a needed repair, we will be paying for parts & labor right?

swartlkk, thank goodness for you and your plethora of knowledge!

#14

06-18-2009, 11:51 AM

swartlkk

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TSB's are released to help technicians diagnose common problems more easily. They are not recalls so any shop rates and materials costs will be applied to the repair.

You can do this repair yourself if you are mechanically inclined. It is not too terribly involved, but removing the timing cover can be a bit of a pain (oil pan needs to be loosened and dropped in the front).

#15

06-18-2009, 03:12 PM

SWANNERZ

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Quote:

Originally Posted by SWANNERZ

I was looking at some of the other TSB'S and #02086 looked like it could be the solution as well. Intermittent Neutral at takeoff, or steady speed.

#16

06-18-2009, 06:36 PM

swartlkk

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I cannot find the text for that TSB...

#17

06-18-2009, 09:05 PM

SWANNERZ

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Quote:

Originally Posted by swartlkk

I cannot find the text for that TSB...

TSB Number:02086 NHTSA Number:10007782 TSB Date:January 1, 2004 Date Added to File:July 12, 2004
Failing Component:
Power Train
Summary:
4l60e, 4l65e intermittent neutral from a stop or steady speed.

This is all I could find without having a Alldata account. It sounds interesting though.