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DP tuner trouble
Thread Starter
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Senior User
Joined: Nov 2007
Posts: 160
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DP tuner trouble
I installed my F5 switch and chip today and it runs awesome in all the tunes (80econo, 120, and 140 aggressive). However, I noticed that when I switch to the stock program at idle, the RPM's drop really low and it almost sounds like the engine is going to die then the RPM's jump back up higher than normal then back to normal RPM range. What could be causing this? Also, on the 140 aggressive setting, I get no smoke at all. I know I won't get that much because I dont have injectors and everything but i get literally no smoke. Does anyone know why? Thanks for the help guys, and the DP tuner definitely lived up to its reputation in performance.
Elder User
Joined: Sep 2007
Posts: 624
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From: Kalamazoo, MI
I wouldn't really call that a problem..
the tuner works by over-riding the factory settings as far as idle speed, idle fuel delivery, timing, etc..
the first time I fired mine off after installing mine, there was a marked difference in how it sounded when it fired...
so when you flip it back to stock program, it's going to take the computer a second to figure out whats going on (the stumble)
and it's then going to respond like it was originally programmed (the flare)
the tuner works by over-riding the factory settings as far as idle speed, idle fuel delivery, timing, etc..
the first time I fired mine off after installing mine, there was a marked difference in how it sounded when it fired...
so when you flip it back to stock program, it's going to take the computer a second to figure out whats going on (the stumble)
and it's then going to respond like it was originally programmed (the flare)
Posting Guru
Joined: Sep 2007
Posts: 1,715
Likes: 2
From: Seneca, SC
As far as I know my truck does not have injectors in it, yet when in the 140 aggressive tune, it blows out a huge black cloud with even the slightest touch of the gas.
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Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
are u running bio? otherwise, something is a miss cuz it doesn't take much at all for me to leave a rain cloud on someone behind me.
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Lead Driver
Joined: Jun 2007
Posts: 7,760
Likes: 27
From: Hampton, Maryland.
As for the 140 tune not smoking, it should most definitely smoke. It should smoke in 80E 120 and 140, a little darker as you go higher in number but all of them will smoke very well if your trucks HPOP is healthy.
Thread Starter
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Senior User
Joined: Nov 2007
Posts: 160
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I'm running regular diesel, not bio. Do you think if the contacts arent clean enough that it could be causing the no smoke issue? The power feels extremely strong to me but just no smoke. Its not that big of a deal but its kinda cool to be able to smoke someone on demand.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
Don't think its the chip or the install, Mine will turn on street lights as well. Hows your fuel filter? Pressure? Remember, you have to have the fuel to dump it, black smoke is unburned fuel, and yes, even at $5.00 a gallon, I still blow some out once in a while.