275v2 defueling...??? - Ford Powerstroke Diesel Forum
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post #1 of 8 Old 12-09-2010, 08:35 PM Thread Starter
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Question 275v2 defueling...???

i normally run the 310 tune as my dd...the first production one. every now and the ill switch to the 275v2 because its smoother than the 310. i switched over to it today and its defueling at half throttle and full throttle. the first time it happened it was at half throttle and i was on an onramp to a freeway. i was in 3rd and it just fell flat on its face. the 2nd time it happened i was at a stoplight and hammered down and right when the tires stop spinning it did it again. any idea why its doing this or how to correct it? thanks
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post #2 of 8 Old 12-10-2010, 01:44 PM
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Transmission is sensing slip and sending a signal to the ECM to make the truck defuel....or something along those lines.

Jeff Dodd
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post #3 of 8 Old 12-10-2010, 02:54 PM
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this happened me to as well about 2 days ago...what do we do about it Jeff? I was on the 275 tune

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post #4 of 8 Old 12-10-2010, 07:33 PM
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Transmission relearn...

Jeff Dodd
spartan_jeff12@yahoo.com

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Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #5 of 8 Old 12-10-2010, 07:56 PM
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Ok, I have a question about the relearn. say I have the tune loaded for a week and finally decided to do a relearn. is that ok? or does the relearn need to be done as soon as the tune is loaded?

2003 Dodge Ram 3500 SRW QCSB: Stock
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post #6 of 8 Old 12-10-2010, 08:01 PM
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Not sure why you would wait a week, but yea you can do it anytime. You could do a relearn after having the tune loaded up a month. It's actually good to do a relearn every once in awhile. Keeps your shifts from getting off. With our TCM, I recommend doing one right after you load a tune. Once you've done that, the next time you do one doesn't have to be as extensive. Just a few hard pulls from 0-60 should be fine. Anytime you load a tune though, you should do some sort of relearn.

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post #7 of 8 Old 12-10-2010, 08:18 PM
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some sort of relearn as in a few runs at quarter throttle and half throttle? or? Everytime I load a new tune I do the relearn process correctly.

2 runs at quarter throttle
2 runs at half throttle
2 runs at 3/4 throttle
40 to 70 @ WOT
0-75 @ WOT 2 times.

are you saying I dont need to do this everytime? because I really hate running my truck that hard. I change tunes alot

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post #8 of 8 Old 12-11-2010, 08:18 PM
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Quote:
Originally Posted by Black Beauty View Post
some sort of relearn as in a few runs at quarter throttle and half throttle? or? Everytime I load a new tune I do the relearn process correctly.

2 runs at quarter throttle
2 runs at half throttle
2 runs at 3/4 throttle
40 to 70 @ WOT
0-75 @ WOT 2 times.

are you saying I dont need to do this everytime? because I really hate running my truck that hard. I change tunes alot
Why are you switching tunes so much?

Anytime you load up a high line pressure tune with the TCM, you should do a relearn. Eliminate the 1/4 throttle runs and eliminate the 40 to 70 at WOT run. You definitely need some 1/2, 3/4 and WOT runs though.

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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