Hesitation from a dead stop - Ford Powerstroke Diesel Forum
6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 32 Old 07-17-2010, 03:11 PM Thread Starter
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Hesitation from a dead stop

I just got my spartan 250 tune.s&b intake and full exhaust(dpf delete) done friday. Other than my trans shifting weird it seems to have alot of hesitation when you first take off. under normal driving, the initial acceleration could be better. Once its going its fine, just coming off the line it struggles. Is there somthing I can do for this. The truck has done this since I bought it (27k miles). This was one of the reasons I got the tuner. Truck has 3" lift w/37x13.50 tires on stock wheels.
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post #2 of 32 Old 07-18-2010, 10:47 AM
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Check your EBP sensor for soot, this is a common issue and will cause some crazy stuff to happen as far as lag and higher than normal boost conditions.

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post #3 of 32 Old 07-19-2010, 11:30 AM
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Are you getting any codes or a noticeable amount of soot from a stop at light throttle?

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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post #4 of 32 Old 07-19-2010, 02:24 PM Thread Starter
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Quote:
Originally Posted by 08stroker250 View Post
Are you getting any codes or a noticeable amount of soot from a stop at light throttle?
No codes, and not to much smoke. I was told today to check into getting traction bars. The slight hesitation could be the axle rolling back. I have 37" tires and thats what it feels like is happening, I was also it will make the trans feel smoother when shifting. What do you think
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post #5 of 32 Old 07-19-2010, 02:41 PM
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Traction bars prevent axle wrap and soften up the shifts. I couldn't imagine that axle wrap would cause this though. I also can't imagine that there would be axle wrap taking off normal. I could be wrong though. It's hard to diagnose the cause of this without being in the truck myself. Hesitation can be caused by a lot of things.

If you are only noticing it when you put it to the floor, it's turbo lag from the bigger tires and axle wrap. If it's doing it at light or part throttle, it's something else.

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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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post #6 of 32 Old 07-19-2010, 03:28 PM Thread Starter
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I did pay closer attention to the amount of smoke coming out of the tail pipe when I just drove it. It was enough to notice it coming from the tail pipe, nothing extreme just a small puff of black smoke at the initial take off at normal throttle.. What sucks is I have nothing to compare it to. I have only put 700 miles on the truck since I got it and maybe 200 of them are with the new tuner. It had 27k on it when I got it. And its my first ford. But it just doesent seem right. What are some things I can look for
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post #7 of 32 Old 07-19-2010, 03:57 PM
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mine smokes when i leave from dead stops to i notice it everytime and i have the dpf still and im on the 150 tune, i put a mbrp dpf back on and it smokes more than stock for sure im almost worried i could of maybe done somthing to the dpf when i was getting the pos stock exhaust off. is it possible to crack a dpf or sumthing by trying to get the stock exhaust off??

Cory Duffie
2012 F-350 CC 6.7L
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post #8 of 32 Old 07-19-2010, 06:04 PM
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Quote:
Originally Posted by firefighter4 View Post
I did pay closer attention to the amount of smoke coming out of the tail pipe when I just drove it. It was enough to notice it coming from the tail pipe, nothing extreme just a small puff of black smoke at the initial take off at normal throttle.. What sucks is I have nothing to compare it to. I have only put 700 miles on the truck since I got it and maybe 200 of them are with the new tuner. It had 27k on it when I got it. And its my first ford. But it just doesent seem right. What are some things I can look for
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mine smokes when i leave from dead stops to i notice it everytime and i have the dpf still and im on the 150 tune, i put a mbrp dpf back on and it smokes more than stock for sure im almost worried i could of maybe done somthing to the dpf when i was getting the pos stock exhaust off. is it possible to crack a dpf or sumthing by trying to get the stock exhaust off??
Your situation is totally different from this. You have a blown through DPF.

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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post #9 of 32 Old 07-19-2010, 06:48 PM
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I have the F350 dually and recently installed a Spartan. I was running the 275 tune today and have slippage when I hold the brake to ramp up turbos and put it to the floor. Man its fast but I wonder if I need the traction bars? The 250 tune only slipped once, but the 275 is doing it a lot more could the wheels be jumping when losing traction and cause this to happen? What is the best way to fix other than a Sun Coast Tranny?
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post #10 of 32 Old 07-19-2010, 06:55 PM
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you need bars for one,guarantee you are getting axle wrap.you could either rebuild the xmsn or buy a new one.your choice

Patrick
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08 6.4L ECSB
S&B intake,H&S Black Maxx,5" Pipe,Trac. Bars
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Originally Posted by Diesel Tech Mag
All you need is a little knowledge,the right tools, and a buddy's truck to practice on.
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