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Discussion Starter · #1 ·
Hi guys,

I am in the UK and have a 2011 Mustang GT. I've just installed a late 2014 crate engine (guessing late 14 by the different dipstick) into it as the last one died. However, we cant get the crank sensors to relearn and we've tried everything, revving it higher, taking it for a drive, nothing has worked.

All we can think is that the car has been custom tuned without me knowing (it has exhaust and a huge JLT intake). Because when we stuck the OEM intake in it ran terribly so we think its tuned and did not get told by the previous owner when I bought it. We also think this is why the crank is not relearning, unless someone else knows another reason why it might not be?

I've ordered an SCT X4 to retune the ECU however, when we plug it in, will it take the current ECU parameters as stock? So it will think my tuned ECU is a stock ECU and use those parameters as stock? Obviously if that's the case then I have a problem as I want to get the ECU to stock and relearn the crank and then tune it again to a tune that I put on her.

If the X4 can't get the ECU to a stock state, how can I get it done? I don't really want to buy a new ECU after forking out thousands already.

Thanks in advance.
 

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The SCT X4 cannot return your car to stock, only the dealer can do that. Yes your car was previously tuned.

The good news is the X4 can do the crank relearn for you.
 

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Discussion Starter · #3 ·
The SCT X4 cannot return your car to stock, only the dealer can do that. Yes your car was previously tuned.

The good news is the X4 can do the crank relearn for you.
Thanks for the info. Only thing is I don't think the ford dealers in the UK would have a flash for anything earlier than 2015 as they only sell 2015+ mustangs here. Any way I can get a flash somewhere else over email or something? I've emailed SCT to ask them too.
 

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You're best bet is to locate (perhaps on EBay in the U.S.) an used ECU from a 2011 GT mustang, unless you're local Ford dealer can reflash the one you have now.

Another option is to remove the ECU you currently have, and send it off to a Ford dealer in the states to be reflashed. Perhaps your local Ford dealer can offer this?
 

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Why are you trying to return the car back to stock? Just use the X4 to do the crank relearn and off you go.

But yes your dealers would have a stock file for you.
 

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Discussion Starter · #6 ·
Why are you trying to return the car back to stock? Just use the X4 to do the crank relearn and off you go.

But yes your dealers would have a stock file for you.
Well the car currently has an unknown tune on it and do I have to return the car to stock in order to retune it? Or can I just flash it to a new tune with it already being tuned?

Also the crank relearn isn't working and we thought that maybe this is something to do with the tune and returning to stock might allow it to relearn?

I'm tempted to just flash it to a new tune on the X4 when I get it and see if the crank relearn works then. Because I've heard that it shouldn't matter whether the car is tuned or not with regards to the crank relearn. I just want to get it back from the garage as they are charging me god knows what per hour to fuss around with this stupid crank relearn thing.
 

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Tuning shouldn't matter for crank relearn. I had to replace the engine in my 2013. Took it in, with the turbo and turbo tune, and the dealership did the crank relearn. I didn't have the X4 so had to take it in.
 

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And yes, you can just upload your new tune without setting it back to the stock tune. I've done it many times when data logging and testing tunes for Doug Studdard (former owner of Bama).
 
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