Another new DP owner

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Jun 29, 2007 | 06:05 PM

Rushmore X

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Joined: Mar 2006

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From: Rapid City SD

Another new DP owner

Just installed DP Tuner yesterday. Instructions very straight-forward and easy to follow, and I'm one that if it can go wrong, it will. Seems like about 2 MPG better, will know for sure once I fill up. My speedometer was off about 5 mph before the DP Tuner, now is only off by 3.
Do have a question though... When running errands today, the beast died twice when I let off the gas. Ran without a hitch yesterday. I was running the 40 tow tune without any load, and only me in the vehicle. Put it in neutral and attempted, restart... wouldn't. pulled over, shut it off, and restarted, ran fine, then did the same thing about 2 miles later. switched it back to stock, and drove the rest of the way home. Did the tuner make the CPS more senstive to dying, never had this problem before?

thanks

Jun 29, 2007 | 06:23 PM

powerstroked162

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Joined: Apr 2004

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From: Ellensburg, Washington

I think you have a faulty CPS bud.

Cowboy Steve

Jun 29, 2007 | 10:23 PM

aklim

Lead Driver

Joined: Jan 2006

Posts: 7,308

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From: Hartford, WI

Quote:

Originally Posted by Trent Fliginger

Did the tuner make the CPS more senstive to dying, never had this problem before?

thanks

Not likely. I'd go with the CPS

Jun 29, 2007 | 10:37 PM

ryaneverk2

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Joined: Mar 2004

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If it's a pretty sudden shutoff, like you turned the key, it's likely the CPS. If it's a sort of stuttering issue as it falls to idle and then dies, it could be a tuning problem... but unlikely with the basic tunes for stock injectors and oil.

I'm betting CPS, as well.

Jun 30, 2007 | 07:56 AM

IDPisan

Elder User

Joined: Sep 2006

Posts: 627

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From: Middleton, Idaho

Make sure your F5 swicth is plugged in properly and is tight, if it is a little loose it will also shut off your motor.

Jun 30, 2007 | 08:01 AM

m.i.nutz

Freshman User

Joined: Dec 2003

Posts: 38

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My F5 switch has fallen off (due to falty installation) and it kept running, but it went into stock mode.

Jun 30, 2007 | 09:31 AM

MAKO314

Cargo Master

Joined: Apr 2006

Posts: 2,153

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From: Concord NC

make sure the chip itself is in good and tight if its loose the engine will stumble or stall

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Jun 30, 2007 | 10:32 AM

Izzy351

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Joined: Feb 2007

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From: Dallas-Ft. Worth

Mine popped off the cable once (it went to stock), and I was trying to figure out what was going wrong with my truck! It finally dawned on me to see if I bumped the switch to stock or something, but it was off. Soon as I plugged it back in, it was back to normal. I haven't had any shutting off or poor running issues with the DP. Did you clean the connector per instructions (just a little copper showing around the pads)? And is the module taped in place? I had to trim the plastic PCM bracket to allow everything to fit correctly though. I then used duct tape to hold everything in place. And make sure the little grounding tab under one of the screws in the plastic bracket is in place -- the case of the PCM needs to be grounded.

Joe