I recently made some changes to my 97 f350 dually. Added a mindblower chip, went to 4" straight exhaust with no guts, and added a super large air filter with forced cool air. Got a nice response from stock which was a little weak when pulling a 10K loaded trailer. Didn't have any smoke till I added the chip and now get just a little black on accelleration. Truck runs fine but last week added some diesel kleen to the fuel, got about 10 miles down the road and now it blows heavy white grey smoke all of the time. buzz test good, electrical tests good. no codes. contribution test weak...where should I look for causes? truck still runs fine but looks like a steam engine when running...Help! Could it be the additive or something much worse?

 

Check the coolant. Sounds like blown head gasket or cracked head and your burning antifreeze.

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Thanks! Coolant remains full. Wouldn't a compression test via the glow plugs show if any issues with the heads or gasket? There is no water in the oil or wouldn't I see that with a desel? I do also note a tapping sound coming out of the exhaust but can't hear that under the hood. How hard is it to change the head gaskets on these beasts?

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Anyone else had an issue like this?

 

If your not loosing coolant. That might not be it. Possible that there is water in fuel. Or could be the additive. Run the pics out of it until the tank gets low. Refuel and see of fresh fuel helps.

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If you were burning coolant, it would have a sweet smell to it similar to the taste of antifreeze. White smoke while you're rolling down the road sounds more like a stuck injector. The tapping sound could either be the stuck injector or just the sound of too much liquid diesel in the combustion chamber. I'm kind of guessing on that one.

 

Well,

I think I have identified the issue...now it is throwing codes for a bad IDM...looks like several injectors are out of sync. I wonder if bad connections could do this or do these things just eventually go bad without a lot of warning? Is there a way to check them without replacing them? Seems strange that the ywould go from no codes to multiple ones in a single drive...truck still runs great but what a smoker...I can fog the whole neighborhood in just 5 minutes....and almost watch the fuel level drop as it runs. I am parking it until I can swap this IDM out with another. I have heard that some of the IDM MODs are good to upgrade them as well....thoughts?

 

How much should I expect to pay for an IDM for my '97 7.3? Anything special I should watch out for with installing? Looks pretty easy...