Is this normal with the 275 - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

 
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post #1 of 9 Old 06-22-2009, 08:32 PM Thread Starter
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Is this normal with the 275

When im cruising between 45-55 mph I can feel the truck surging a bit. RPM's dont move and niether does the speed, it just feels like it's speeding up for a brief second then cuts off. I believe its the torque converter trying to lock. If i get into it a bit the TC locks up and it doesn't do it any more. It's kind of a pain since it's 50 mph almost every were around here and i can't run 60 all the time.
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post #2 of 9 Old 06-22-2009, 08:39 PM
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Monitor your rail pressure and see what it does at that point. If it jumps up and down then you will know its surging. Sometimes if your converter is close to locking up and you dont continue in the throttle it will kind of jump a little, but I think thats pretty normal under cruising conditions. But like I said, monitor the fuel rail pressure, that should tell you

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post #3 of 9 Old 06-22-2009, 08:43 PM Thread Starter
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The rail pressure seems to be pretty steady but so does the tc slip.. I dunno? I've only been running the tune for a couple days maybe it just needs some time!
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post #4 of 9 Old 06-22-2009, 08:48 PM
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Originally Posted by Alaskadiesel View Post
The rail pressure seems to be pretty steady but so does the tc slip.. I dunno? I've only been running the tune for a couple days maybe it just needs some time!
If the rail pressure is fine and the tq slip rpm is fine, then I would guess its the right before lock-up feeling at a cruising speed. I wouldnt worry about it to much unless it gets worse. As long as its not doing it before lock-up at WOT or a faster speed then it should be fine

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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 9 Old 06-22-2009, 08:52 PM Thread Starter
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Thats what i was thinking, just wanted to see if anyone else was experiencing the same thing.. I do love the tune though!! Just feel bad for my mud grapplers, looks like i'll be ordering some 38's sooner than i thought!!!
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post #6 of 9 Old 06-22-2009, 09:00 PM
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Thats what i was thinking, just wanted to see if anyone else was experiencing the same thing.. I do love the tune though!! Just feel bad for my mud grapplers, looks like i'll be ordering some 38's sooner than i thought!!!
Haha, I hear ya there man. My Toyo Open Country MT's are almost gone after about 22,000. The "310" beta tune is even worse on them

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post #7 of 9 Old 06-22-2009, 09:06 PM Thread Starter
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I can't even imagine! I need to get my hands on it before these tires are toast, so i dont burn up the new ones right away!


2008 f-250 CC SHORT BOX
8" FABTECH FOUR LINK
37X13.50R18 NITTO MUD GRAPPLERS
S&B CAI
FLO-PRO 4" STRAIGHT PIPED
275 SPARTANIZED!!!
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post #8 of 9 Old 06-23-2009, 05:12 AM
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Originally Posted by 08stroker250 View Post
Haha, I hear ya there man. My Toyo Open Country MT's are almost gone after about 22,000. The "310" beta tune is even worse on them
Man 22,000 sounds great, I may try and get me some of those. My stockers that came with the truck aren't gonna make it to 15k at this point. And 7k was without my Spartan setup.

Will they hold 50+psi to keep the dang light off for the pressure sensors?

2013 Platinum
2013 Explorer sport
2011 CTS V
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post #9 of 9 Old 06-23-2009, 01:35 PM
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Mine are a 80 max psi tire and I keep 65 in both with no issues. I have about 18,000 miles on mine with the Spartan

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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