Quote:
Originally Posted by thors_1
I'm switching out my 4.6L to a 5.4L. both are 2 valve engines. If I install a.... cobra 4.6L dohv I need a different ECM. if you can give a link to where you can get your ECM redone/custom tuned from a single to a double it would save a lot of people some cash.I've never heard of anyone doing it, but then I'm not a mechanic and know nothing about the newer electrical on a car.
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you dont need a new ECU... you just need for a good tuner to tune it.... a buddy of mine has a 4v with a C4 in a 98gt still using the stock ECU