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Thread: 1999 Mustang GT Computer swap.

  1. #1
    Potential Tuner
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    Question 1999 Mustang GT Computer swap.

    I'm looking for a little expert advice on this one, since i don't want to waste 100 dollars for credits that might not work. i have recently bought a 1999 Mustang GT that had a bad computer in it (reasons unknown). I bought a used computer out of another 1999 model. I installed it into my car and was able to pull a stock file off it, but when I clicked the "read" button to read the computer i had to manually put then VIN into it. After the read was done a message popped up and said that there was no VIN assigned to it, and that it would generate a VIN so that i could license it. That being said, if i buy credits and license it with the generated VIN would it work? i don't want to spend the 100 dollars just to have to take the computer out and have to pay to have it re-flashed by a dealership and then pay again for more credits for it. Thanks in advance for the help!!

  2. #2
    Advanced Tuner
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    Usually you have the computer flashed with as built data which will allow input of vin and current mileage by ford, i have a j2534 box from drewtech that allows me to purchase the calibration/as built data from ford and flash the pcm/bcm/tcm ect, that cost me$50 each time or pay for a subscription. i have this issue before i called SCT and gave them vin number they added to a template and sent me a new file to upload. As i am still learning HP's way of doing business it will cost you 2 credits to license the pcm with generated or original vin, unless i am mistaken.

  3. #3
    Advanced Tuner veeefour's Avatar
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    Quote Originally Posted by jaxman123211 View Post
    I'm looking for a little expert advice on this one, since i don't want to waste 100 dollars for credits that might not work. i have recently bought a 1999 Mustang GT that had a bad computer in it (reasons unknown). I bought a used computer out of another 1999 model. I installed it into my car and was able to pull a stock file off it, but when I clicked the "read" button to read the computer i had to manually put then VIN into it. After the read was done a message popped up and said that there was no VIN assigned to it, and that it would generate a VIN so that i could license it. That being said, if i buy credits and license it with the generated VIN would it work? i don't want to spend the 100 dollars just to have to take the computer out and have to pay to have it re-flashed by a dealership and then pay again for more credits for it. Thanks in advance for the help!!
    I had one car with replaced ECU - done by someone else. I did a read and it went through. When I tried to write it popped a window asking for VIN
    but there was nothing I could change. Clicked OK and it flashed. It had a correct VIN in tune afterwards - no clue where HPT got that VIN from, probably from BCM.