Duramax Diesels Forum Truck of the Week
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Old 12-29-2010, 03:17 PM
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s3gulit s3gulit is offline
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Default Idle is loud as hell and noticeable shake...wtf?

So after christmas eve, i drove home from my lady's parents, was snowing pretty bad and the state boys weren't out, so the 95miles were done in 4hi at about 50, couple time the truck didn't downshift after getting back on the gas from coasting and would try to pull from about 800-900rpm.

Past couple days now, idle has been much lower than normal and truck shakes quite a bit more in idle park, or in gear stopped with the brakes on. Any clues as to what might be going on?

Truck has 90K, fluids changed regularly (oil 10K, fuel every 4 mo, trans 1-2x yearly, etc). Only has the EGR block plate/4" straight, and PPE standard on 4.
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Old 12-29-2010, 03:52 PM
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Whats it idling at IIRC 680s normal warm? Does it run the same way if you put it back to stock?
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Old 12-29-2010, 04:27 PM
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air leak in fuel?
water in fuel?
when was the last time you changed your ff? have you ever changed your wif sensor? are you getting any codes?
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Old 12-29-2010, 06:04 PM
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s3gulit s3gulit is offline
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Join Date: Dec 2008
Location: Illinois
Truck: 03 ECSB
Engine: LB7/ZF6
Transmission: Manual
Posts: 197
Default

WIF sensor is there but the wires, somehow got stripped. Been like that for atleast a year and never had a problem. FF was changed in october, straight #1 with no signs of waxing/gelling.

Haven't put the stock info back on, tuner has been on again since late october when the truck got done pulling the wagons and support trailer for the farm (put it back to stock so the hired hands dont screw anything up).

Will look at heated idle tomorrow and get back to you guys
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