Slow Turbo Spool

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Aug 17, 2007 | 04:44 PM

jambroson

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Joined: Jul 2003

Posts: 117

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From: Phoenix, AZ

Slow Turbo Spool

I need some help from you guys. Here is my situation:

I have a 2005 Ford 6.0

I installed a rebuilt Turbo on my vehicle. The rebuilt Turbo is a real dog off the line. Right at the top of first gear it finally spools up and the truck starts moving. I am running an SCT so I went back to the stock setting. Same problem. I did the KAM reset and VGT Relearn and had the same problem. I guess I felt like wasting $250 because I went out and purchased a Turbo Actuator and did the Kam Reset and VGT Relearn again. Same problem. I get plenty of Turbo Boost once kicks in it just takes a while. I am not getting any codes.

Any advice from the professionals?

Also, I have access to a Snap On Diagnostic Tool with the CAN adapter. Does anyone know what readings I should be getting form the turbo?

Thanks in advance for your help.

Josh
2005 Ford F250 Crew Cab, Banks 4" Exhaust, SCT Tuner From Spartan, Quadzilla Commander
1968 Ford 3/4 Ton with a 428 .60 over

Aug 17, 2007 | 05:06 PM

LvTitan

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From: Las Vega$

what transmission are you running ? when you floor it, how long in seconds from the time you mash the pedal till you are around 20psi ?
do you have a boost gauge ?

Aug 17, 2007 | 05:22 PM

jambroson

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Senior User

Joined: Jul 2003

Posts: 117

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From: Phoenix, AZ

I have the TorqShift Automatic. It takes about 4 seconds. I have the Quadzilla Commander and I am getting good Boost. I think up to 34 PSI.

Last edited by jambroson; Aug 17, 2007 at 05:29 PM. Reason: Forgot boost guage

Aug 17, 2007 | 08:53 PM

BGMSPD

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Joined: Jan 2007

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From: Sarasota, FL

i'm sure one of the resident experts will chime in here but 34psi....that thing should't hit over 30 psi.

Aug 17, 2007 | 10:07 PM

LvTitan

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From: Las Vega$

34 not bad, i could usually run around 32 psi with my stock turbo when i had the edge module on it.
but 4 seconds.. sounds like maybe your vgt nozzles stuck open, which would explain both the long lag, and the high boost.

Aug 18, 2007 | 11:41 AM

Danno126

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Joined: Feb 2006

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Check to make sure the Y pipe on the back of the engine is sealed up and isn't cracked.. If it's cracked you should see soot on the engine or firewall..

Aug 18, 2007 | 12:49 PM

jambroson

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Senior User

Joined: Jul 2003

Posts: 117

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From: Phoenix, AZ

Y pipe is good. Something is up with this Turbo. It was doing the same thing before and I am wondering if the rebuild was not correct or if something else is going on.