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post #1 of 15 Old 08-07-2012, 09:21 AM Thread Starter
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WOT lag at first

Can anyone tell me what would cause a 6.0 to bog down when you first stomp down on the fuel pedal. My 05 6.0 hesitates before taking off when I floor it at a dead stop and when crusing down the road. After a second or two it takes off like a rocket .
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post #2 of 15 Old 08-07-2012, 09:25 AM
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That's the standard lag of the stock turbo, it tends to spool better when you roll into the throttle vise dropping it to the floor. Has to do with the control of the vanes, from what I've gathered.
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post #3 of 15 Old 08-07-2012, 09:26 AM
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Are you just smashing the go pedal or rolling into it?


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post #4 of 15 Old 08-07-2012, 09:28 AM
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Quote:
Originally Posted by colo_dually View Post
That's the standard lag of the stock turbo, it tends to spool better when you roll into the throttle vise dropping it to the floor. Has to do with the control of the vanes, from what I've gathered.
Exactly......engine has to generate exhaust flow to spool to the turbo first

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post #5 of 15 Old 08-07-2012, 09:47 AM
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Welcome to the world of turbos
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post #6 of 15 Old 08-07-2012, 10:04 AM
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Originally Posted by towboat View Post
Can anyone tell me what would cause a 6.0 to bog down when you first stomp down on the fuel pedal. My 05 6.0 hesitates before taking off when I floor it at a dead stop and when crusing down the road. After a second or two it takes off like a rocket .
Normally the 6.0L is a little laggy due to the VGT portion just not reacting as fast as we would all like.

It might be that the vanes, unison ring or the VGT solenoid just arent working properly.

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post #7 of 15 Old 08-07-2012, 10:05 AM
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Quote:
Originally Posted by towboat View Post
Can anyone tell me what would cause a 6.0 to bog down when you first stomp down on the fuel pedal. My 05 6.0 hesitates before taking off when I floor it at a dead stop and when crusing down the road. After a second or two it takes off like a rocket .
Your truck is broken. you should sell it to me for half of what you paid for it and buy a civic.

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post #8 of 15 Old 08-07-2012, 10:37 AM
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Yep...get used to it dude. These 6.0s need RPMs and boost to get anything done. Even with a powermax, if I put it to the floor from a stop, it takes what seems like forever for it to light up and go. And that whole time it's billowing so much black smoke you'd think it's a Cummins. I wish it had more low end grunt, but you just get used to it and adjust your driving habits accordingly. Heck I can't even chirp the tires when I put it in reverse and nail it real quick. Lots of smoke and whistling, but by the time the power hits, waaayyy to much speed for going in reverse...

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post #9 of 15 Old 08-07-2012, 01:07 PM
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If this is a cause of concern, that you want to do something about it, I recommend looking into FICM tuning.

A +40HP (PHPs - Altas40, or IDPs Moderate) or +80HP file (PHPs - Atlas80, or IDPs Exterme), would provide an improvement in low end fueling and torque, and get the stock turbo spun up sooner.
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post #10 of 15 Old 08-07-2012, 03:48 PM
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Mine responds the same. It takes a min to get upand go. Seems to be a whole new animal when you steadily roll on the throttle though..

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