DP 120hp question

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Apr 19, 2007 | 11:22 PM

dpc

Thread Starter

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Joined: May 2005

Posts: 45

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From: Granite Falls, WA

DP 120hp question

Ok, I have a DP with 60/80eco/120 settings . My truck runs great on the 60 and 80 but on the 120 it seems I get surging at full throttle. Not from a stop but if I floor it staring off at about 20mph it starts huffing smoke. i do get smoke in the 80 and 120 settings. Looks about the same amount too me but only the surging on the 120. Any opinions or ideas. This is my first PSD and my first turbo engine. Its a whole new way of thinking

Apr 20, 2007 | 12:03 AM

travis dasher

Senior User

Joined: Sep 2006

Posts: 357

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From: Kailua Hawaii

What type of intake and exhaust mods have you done? I am thinking too much fuel and not enough air but not knowing your other mods it is hard to tell.

Apr 20, 2007 | 08:02 AM

jrciii56

Elder User

Joined: Mar 2006

Posts: 751

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From: Greeneville,TN

Is it surging between shifts? If it is it may be the turbo the turbo. A common fix would be a new compressor housing or a WW.

Apr 20, 2007 | 08:52 AM

Izzy351

Post Fiend

Joined: Feb 2007

Posts: 14,541

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From: Dallas-Ft. Worth

Quote:

Originally Posted by travis dasher

What type of intake and exhaust mods have you done? I am thinking too much fuel and not enough air but not knowing your other mods it is hard to tell.

From his Sig Block:
2002 F250 XLT - 4" LIFT, 35" TOYO MT's, 4" TURBO BACK, 6637 MOD, AUTOMETER PILLAR GAUGES, DP-TUNER W/60-80-120 with Overbooste Elim.

He should have plenty of air...

Joe

Apr 20, 2007 | 10:23 AM

JGRNAUT_7.3L

Mountain Pass

Joined: Aug 2006

Posts: 203

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From: Port St Lucie, FL

Gonna say it could be your engine defueling because of overboost but saw you have the eliminator so that blows that theory unless its not working right.

Apr 20, 2007 | 11:10 AM

dpc

Thread Starter

Freshman User

Joined: May 2005

Posts: 45

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From: Granite Falls, WA

Everything I read says that besides turbo mods I have it good to go for this setting. I dont use it very much. usually I stay in the 80econo for best overall. It just seems like it falls on its face on the 120. I do have the overboost elim but I do get the engine light sometimes when i get on it hard but not at the same time as the surging.