DP tuner changing settings and trucks reaction - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 20 (permalink) Old 11-06-2007, 02:08 PM Thread Starter
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DP tuner changing settings and trucks reaction

When I get back from driving my truck anywhere, I turn it to the stock program and let it run for a bit to cool the turbo. When I turn it from economy to stock, the rpm drops and they drop to around 400-500 then back to standard idle. It almost sounds like the truck is going to die.

What could be causing this? I have Auto E. so I can scan the truck as needed. What should I look for?

02 F250 PSD 7.3L
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DP tuner 6 position
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post #2 of 20 (permalink) Old 11-06-2007, 02:13 PM
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Re: DP tuner changing settings and trucks reaction

Sudden change in ICP, Timing, PW, etc...the programs are very different and it takes a second for the PCM and engine to "jive" again.

Dennis Schroeder - Co-Owner of Strictly Diesel

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post #3 of 20 (permalink) Old 11-06-2007, 02:30 PM
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Re: DP tuner changing settings and trucks reaction

Yeah mine does it too! Subtle but its there

Darrin Struble
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post #4 of 20 (permalink) Old 11-06-2007, 02:54 PM
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Re: DP tuner changing settings and trucks reaction

Agreed. I have the same thing. I don't even bother setting it to stock. I just cool it down by going slow when I am coming to a stop and coast. By the time I shutdown, I am at 300 deg or so

01 Excursion 7.3L Powerstroke. Gauges with AIH Delete, AIS, CCV Mod, 4' MBRP, BTS Trans, 6.0L Trans Cooler and Intercooler, DP-Tuner F5 chip, ITP In Tank Mod and Boost Annihilator, Diesel Innovation's Regulated Fuel kit, BTS Big Oil system, GTP38R Turbo with 1.15 A/R housing and BPD Stage II AC injectors. Bilstein Shocks with U front and A Rear.
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post #5 of 20 (permalink) Old 11-06-2007, 03:05 PM
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Re: DP tuner changing settings and trucks reaction

Agreed. I wouldnt sweat it at all.





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post #6 of 20 (permalink) Old 11-06-2007, 03:10 PM
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Re: DP tuner changing settings and trucks reaction

Mine does the same thing. Also, idle will jump when you switch from stock to a higher setting. My truck also idles quieter in stock setting. Is this the same for everyone else?

Dave

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post #7 of 20 (permalink) Old 11-06-2007, 05:50 PM
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Re: DP tuner changing settings and trucks reaction

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Originally Posted by wooner View Post
Mine does the same thing. Also, idle will jump when you switch from stock to a higher setting. My truck also idles quieter in stock setting. Is this the same for everyone else?
It should Idle and run all louder than stock. Why this is was debated for like all last year. Resolution.... No one has a clue why

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post #8 of 20 (permalink) Old 11-06-2007, 06:18 PM
 
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Re: DP tuner changing settings and trucks reaction

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Originally Posted by wooner View Post
Mine does the same thing. Also, idle will jump when you switch from stock to a higher setting. My truck also idles quieter in stock setting. Is this the same for everyone else?

Ditto and will even die tuning down to stock unless I give it a little pedal. Then idles fine after that. I notice icp fluctuates wieh it does this, fuel pressure stays at 65 or 67 where it is set.

I mentioned it to Jody and he said pretty much the same thing Dennis did. Just takes a moment for everything to get in sync again.
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post #9 of 20 (permalink) Old 11-06-2007, 08:15 PM
 
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Re: DP tuner changing settings and trucks reaction

There really isn't much of a mystry to why the truck idles louder in a performance tune. ICP and timing are both increased in most, if not all, chips and tuners. Either or both of which will increase noise at idle. You can watch the timing with a scanner or AE. The idle dip is nothing more than was already stated, you made a big change quickly, espcially if you went from the hot program to stock and the ECM needs a bit to catch up.
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post #10 of 20 (permalink) Old 11-07-2007, 12:37 AM
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Re: DP tuner changing settings and trucks reaction

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Originally Posted by 69W900A View Post
There really isn't much of a mystry to why the truck idles louder in a performance tune. ICP and timing are both increased in most, if not all, chips and tuners. Either or both of which will increase noise at idle. You can watch the timing with a scanner or AE. The idle dip is nothing more than was already stated, you made a big change quickly, espcially if you went from the hot program to stock and the ECM needs a bit to catch up.
yes the reason it idles louder is known, but why it is louder, sometimes significantly louder, while driving was discussed in numerous threads on TDS earlier this year and no one had a real answer for the so called "injector clatter"

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