SCT X3 problems?? - Ford Powerstroke Diesel Forum
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post #1 of 15 Old 03-22-2011, 02:35 PM Thread Starter
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SCT X3 problems??

Just wanted to see if I can get some insight to a problem I have with my sct tuner. I just uploaded the street tune form innovative diesel onto my truck. First impression, I love the smooth shifting and I hand timed my 0-60 at about 7.5 sec with a light boosted launch and a little wheel spin so it definitely is a huge improvement over stock. However when the truck shifts from 2nd to 3rd and to 4th it sputters quite noticeably at about 3500 rpm. At first I thought the trans was slipping but when it does finally shift its firm not mushy and of course this is only at wot. So I ran it a few more times and it seems to me that its cutting out. Just wondering if anyone else has run into this same problem, Ive checked for trouble codes and there is none and I just had my fuel filters changed by the dealership. Im wondering if its a problem with the fuel mapping or something. Any advice??

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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post #2 of 15 Old 03-22-2011, 03:20 PM
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Did you let the transmission relearn?

And have you checked fuel pressure?

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post #3 of 15 Old 03-22-2011, 04:16 PM Thread Starter
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I did take it easy for awhile prolly 20 shifts or so, not sure if thats enough. And i havent checked fuel pressure, i dont have the tools to do that. ill have to pay the dealership to check it. But it ran perfect with my superchips tuner and I went straight from that tune to the street tune. I wa thinking possible fuel pressure though so thanks

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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post #4 of 15 Old 03-22-2011, 04:19 PM
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Have you tried a different tune? Or did you just get the street tune? It took my truck quite a while to adapt to the shifting points from moving over from Edge.


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post #5 of 15 Old 03-22-2011, 04:24 PM Thread Starter
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Not yet, im gonna try that tomorrow. I will say that I went to the dealership just a min ago and put a new air filter in it, just cause it needed replaced and when i opened it up again it still seamed to sputter right before it shifted but it was much less pronounced so maybe it does just need a little more time to adjust. I got the xtreme street and tow with jake brake also so ill have to try those tunes out too. what did your truck shift like when you first put the tune on it?

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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post #6 of 15 Old 03-22-2011, 04:25 PM
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sounds like you are hitting the rev limiter...go back into the program and firm up your shifts and drop your peak rpm .
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post #7 of 15 Old 03-22-2011, 04:28 PM Thread Starter
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Micheal, i thought that at first too but i checked the shift points and there set at 3650 and i also told innovative that i do not want to increase the limiter on it. I also watched the tach and it happens right at 3400 to 3650 right before it shifts. and again it shifts firm, not to firm theres no clunck sound or anything. ill check again though just to make sure

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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post #8 of 15 Old 03-22-2011, 04:29 PM Thread Starter
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these transmissions are supposed to be pretty tough right?

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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post #9 of 15 Old 03-22-2011, 04:42 PM
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They are vey tough. The rev limit should be set at 4150 for it to run properly.

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post #10 of 15 Old 03-22-2011, 05:40 PM Thread Starter
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I did not know that, is that what yours is set at sickstroke, i would be scared running that high

2011 f-250, lariat with nav. 20' dale jr. Racing rims with Mickey Thompson 33" tires. Painted to match grill coming soon. Stock exhaust, waiting for warranty to expire.
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