EVO-ALL loses key data info when power is disconnected

Question

It is on a 2008 Ford Mustang.  Manufacture date is 06/2007.  Tried installing with 2008 diagram, but nothing works over CAN (even wire colors are different on OBD2 plug on pin 3 and 11), so I went with the 2007 diagram.  I have tried programming with 1 key, and 2 keys.  Either way if power is lost, the next time you engage the remote start, the immobilizer light flashes and vehicle doesn't start.  If you reprogram it again it works until power is disconnected again.  I have installed over 500 of these units the past 2 years and I have never ever seen anything like this.  Is it actually losing the key data, or is something else going on?

Answer 1

Once an evo is programmed it holds its programming for years and years.

The only time I have seen them do this is when something was wired up wrong or a car was boosted incorrectly.

That being said anything is possible and perhaps this unit has something up, have you tried a master reset, re flash and re rpgroam with the same result?

If yes I would suggest to try another module and see if the symptom replicates itself, if it does then there is certainly something up in the car itself. For it to happen on one module ya that is possible, but if it does the exact same thing with 2 modules then something is definitely up in the car.

Comments

It turns out the immobilizer bypass was not enabling early enough.  Is there any way to make it turn on sooner?

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Try putting the disarm wire with the GWR wires.

This will make it turn on sooner.