Understanding cyl Balance fuel flow rate - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 3 (permalink) Old 08-23-2010, 10:30 PM Thread Starter
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Understanding cyl Balance fuel flow rate

I need a little help here. I got a 2001 With a nasty knocking sound that comes and goes. Sounds like a pre-det knock but im not sure so i was doing some reading here and there during work today and figured id do a balance test.

So here are the results

------avg -----high
cyl1 __-4.51__ -4.11
cyl2 __-0.09__ 0.19
cyl3 __-2.49__ -2.06
cyl4 __-3.49__ -3.95
cyl5 __3.05___ 3.47
cyl6 __0.04___ 0.55
cyl7 __0.91___ 1.38
cyl8__ 7.10 __ 7.34


Is this telling number 1 and 8 are the problems? from what i could read +/- 4 is ok

I also did a cyl drop test and no change in tone of knock

Last edited by Sledpuller500; 08-23-2010 at 10:33 PM.
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post #2 of 3 (permalink) Old 08-24-2010, 12:38 AM
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post #3 of 3 (permalink) Old 08-24-2010, 12:38 AM
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I would say she is due for all 8 as 1,3,4,5, and 8 are out there. The spec is +/- 4 in park and +/- 6 in gear, but these are the figures that GM came out with to cut down on warranty work. I've found much more than +/- 2.5 to cause smoking and other issues.

1995 GMC 2500 SUBURBAN, DURAMAX/ALLISON, 3.42 gears, 261 T-case, Trans has a mild build with ALOT of help from MIKE L. which included ALTO's for C1-C4, PI ML converter, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, EFILIVE, KENNEDY single pump, pump rub kit

http://www.thetruckstop.us/forum/showthread.php?t=10142
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