New head, new tune, now no boost

[Rawze]

ALSo .. the ISX does not loose head gaskets without it dropping a liner. - AND... if it drops a liner ... it always does damage to the bottom side of the head (an example: http://rawze.com/forums/showthread.php?t...48#pid7648 ). This means if you loose a head gasket, you have to counter-bore it, plus RAISE THE LINERS to fix it AND replace the head with a new one. -- EVERY SINGLE TIME ... Anything less and your doing nothing buit pissing up-wind.

What you describe not only sounds like bad de-mandate programming and butchering...but also your problems with it are not likely nearly over yet if someone did not take the time to fix it the right ways when they had the head off it. -- This is clearly a recipe for repeating disaster and clearly people who have no business working on ISX engines.

How much you want to bet that if I owned it, I could build that engine to last a million miles, it fully de-mandated, it have the original VGT turbo on it, it programmed for 600HP too. <- I am just a driver, not a mechanic...It is because I follow all proper procedures and recommendations for the engine, and do not deviate from them.

Also ... how is the thing being driven?--- What rpm ranges do you use most of the time? -- What loads and type of trucking operations? -- What tranny and rear ratios of the truck? -- For all anyone on here knows,.. you could be abusing the thing badly just by the gearing and the way it is driven too. - More info would be helpful towards your plight, and also help you to better understand your equipment instead of letting it get tortured to death repeatedly.

your story sounds like this scenario...
http://rawze.com/forums/showthread.php?t...5#pid41315

see it all the time around here.
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to your orig question ... Get yourself an inline-6 adapter and an old laptop.. you own a modern engine, get the stuff to properly diagnose and work in it to some meduim extent. -- Get the software to pull the program out of your ecm (it is free and all over the internet) and e-mail a copy of your program it to me for review and inspection of accuracy/stability. -- Until you do this, no one will be able to help you with your turbo or other engine issues. - For all you know, the damn thing might be trying to go into an engine mode that it is not supposed to go into causing the turbo and engine to do things it is not supposed to do. This is the most common problem with these clowns who do horrible programming. This problem alone can make one crack heads, melt pistons, or take out liners (head gaskets) in a hurry. -- Sad part is that they all talk a good game but reality is that more than 90+% of shops/ppl doing delete programming out there are BAD.. REALLY REALLY BAD!!!>>>. - Bad delete programs are notorious for this. Until you can get something that is 100% known to be reliable and stable, your wasting your time trying do do anything else with it.

How much you want to bet that whoever 'tuned it' cannot even tell you the proper engine modes the engine should be operating in after such programming... how much you want to bet they likely do not even know how many operating engine modes there are in an ISX.. most of them are so incredibly clueless that it is not even remotely funny. -- How much you want to bet the idiot tells you something like 'we leave that same as factory' because they are really that stupid!. Ask em what the proper fuel-air-mix is for the ISX... what the proper injection timing should be at a given rpm and torque?-- you are not going to get any kind of actual asnwer aside form a bunch of bulls#it excuses .. BECAUSE THEY HAVE NO CLUE!!!-- THEY COPIED WHAT THEY SHOVED INTO YOUR ENGINE BLINDLY FROM SOME OTHER IDIOT WHO DOES NOT KNOW EITHER! -- this is the nightmare you have gotten yourself into and are now suffering the consequences of.

http://rawze.com/forums/showthread.php?t...0#pid16780

http://rawze.com/forums/showthread.php?t...8#pid15548

http://rawze.com/forums/showthread.php?t...5#pid15155

and on and on it goes if someone wants to know the actual truth.

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NEXT, you should pressurize the whole engine. block plate at the intake of the turbo, and one at the outlet/exhaust of turbo, both sides blocked off. then pressurize the whole enigne up wioth 30-40psi of air pressure and find every single air leak there is in the intake, CAC, boots, pipes, air compressor, and egr circuits that may still be connected, exhaust manifold, etc.etc... whole engine ... and fix anything that leaks even slightly. - Bad programming aside, if there are leaks, they need to be fixed.