Is Zero Boost at Idle Normal?
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Look into FICM tuning from powerhungryperformance.com. It helps immensly with throttle response AND fuel mileage and is WAY safe for even a stock motor.
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
I've got zero at idle.
The turbo lag is something you have to get used to. Most importantly, don't push too much throttle. If you do, the PCM ignores the throttle position input, and uses its own slow-assed acceleration algorithym, to prevent smoke and excessive emissions. The trick is to give it all the throttle it can use, but no more, until the boost spins up.
The folks with manual transmissions have a steeper learning curve on that.
The turbo lag is something you have to get used to. Most importantly, don't push too much throttle. If you do, the PCM ignores the throttle position input, and uses its own slow-assed acceleration algorithym, to prevent smoke and excessive emissions. The trick is to give it all the throttle it can use, but no more, until the boost spins up.
The folks with manual transmissions have a steeper learning curve on that.
) or put some tunes in it. Either way it does take a little finesse to make a quick start and it's gonna pull harder as the Rev's come up.
Logistics Pro
Joined: Mar 2007
Posts: 4,604
Likes: 4
From: Claremore, OK
Interesting. I had a 2wd 7.3 (a 2000 F350 extended cab) before (which is why I traded it in). I would assume 3.43:1 or something close (I never checked). I'm betting the 6.0 has 3.73:1 or possibly 4.10:1 since it's 4wd and has a gooseneck hitch (which looks very factory, but may be aftermarket).
You need the pressure, not volume in the exhaust to build boost with the turbo.
I'm hitting easy street
Joined: Nov 2009
Posts: 6,395
Likes: 27
From: Central Oregon
Are you reading VGT's on your Scangauge per chance?
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Jay David
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