Sure does sound like the HB, or crank pulley.
Won't hurt you to drive it for 2 days, but a bad harmonic balancer sure will break the crankshaft (destroying the engine) eventually... Probably won't take 2 days though.
In other words -- I would NOT run the engine till you are sure the problem...
SEE if it's spinnin' --- Don't try to feel it with a finger, or anything else.
Using a screwdriver will ruin the turbo, using a finger will ruin your hand.
To be honest, the surgeon did a great job on my finger, but the tip is still numb after a year. So I guess my hand isn't *ruined*.
Here's what I found at http://flashoffroad.com/Diesel/GM99Diesel/6_5LV8TurboDieselFeatures.htm
"Adaptive cylinder balance * Adaptive cylinder balance is included on the 6.5L turbo diesel. This process measures the horsepower of each cylinder at idle and directs fuel to each cylinder...
I use DeOxIt first to clean the contacts up and then ProGold to keep 'em clean (ProGold has been renamed - Caig's site has the new name).
Ham type radios use UHF connectors and they always gall a bit after being attached for a while. Just a piece of a drop of the ProGold and they still come...
Any gauge (or any other device for that matter) tied into the vehicle's sensor system will have to be a very high impedance device. Otherwise you'll cause the ECM to see false information probably causing all kinds of bizarre probs.
I don't know of any aftermarket gauges that give you the input...
This is from USA Today...
"Fuel-economy numbers posted on new vehicles are generated by 30-year-old EPA tests in which vehicles are run without air conditioning, never exceed 60 mph, never accelerate hard enough to hit 60 mph from a standstill in less than 18 seconds and always go far enough to...
Your meter may show the ground being good even when they aren't up to the task. If you see a high resistance (> 1/2 Ohm or so) the connection IS bad. But, unfortunately, the opposite isn't always true.
Every ground connection should be cleaned and tightened annually (which is overkill, btw, but...
But in this case you, not the PCM, will know how much boost you're running because of the gauge you've installed.
You do have a boost gauge - Right? (Not seeing one in your sig) Otherwise you're taking a real chance of blowing the motor with these mods! (Well...At least the head gaskets).
Feldercarb gasket??? Not on a diesel... Well maybe a hybrid diesel?
Google is your friend - Try "zener diode". A simple device - Just 2 wires. Getting fairly expensive though - some go for as much as 32 cents! Used to be a dime, or less, each!!
[$.32 is from Mouser Electronics - May be...
Does it surge in reverse at idle, or only after the truck starts moving?
Could be the fuel moving to the front of the tank while in motion causing something in the tank (loose baffle?) to block the flow briefly... Going fwd would cause the whatever to move toward the rear of the tank, so then...
The stock bolts (and those from the stealer) are knurled on the shoulder. I believe this is to keep the starter from wandering about. I doubt if your bolt distributer is going to have them... They weren't very much from the Chevy place down the road.
A woman with a Turbo Buick once told me that "Turbo" is a French word that means "You better be sleeping with a good mechanic."
Looked her over and said --- Hey - I'm a good mechanic ;-)
Had a under hood light stay on a while back. Couldn't figure why my batts kept going down -- Till one night when I accidently found the culprit...
Go out to the truck well after dark and have a look around - Ya never know what you might see.
Thanks! Just printed the values for tomorrow.
My ECT is not only disconnected, but the plug has been cut off :wtf:
The bucket truck has remote start and stop from the bucket. I wonder if the remote start is the reason ECT being disconnected :confused5:
The lift pump also runs all the time...
Always looking for MoreData!!!!
DP got me going - Hoping DTR keeps me up to speed.
I'll keep refering to DP for now, but hoping to make this my new diesel info home.
Oh yeah - Thanks for putting this site on the web... A lot of us really need the help - Well, at least one of us :smile5: