I had a AEM credentialed shop install and tune my EMS. Everything was going great, car started up first time with correct base file, after a few tweeks the tuner was driving around the parking lot, then it went on the dyno. About half way through tuning the car died. It would not start up and while cranking almost tried to start the engine backwards (you could hear the flywheel bang off of the starter). After a while it was determined that the crank signal was jacked up, it had a lot of noise. The crank signal was re-wired and the shop told me that the AEM might of fried that part of the wiring. Got the car running again, but every 30-40 seconds the engine stumbled hard and the connection to the laptop would disconnect and quickly reconnect. The shop was not able to explain why, aside from saying the AEM EMS was bad. When the stock PCM was hooked back up the car did not stumble at all. Has anyone encountered this problem? I've researched and most issues appear to be with the coil driver (happened to two people I actually know as well), but I have yet to see this issue logged anywhere.
It's a V1 unit, AEM UEGO wired in, second pump controlled by the A/C relay pin since I took the A/C out, and wired with the AEM boost solenoid. The shop did extend the harness from the AEM to the stock PCM so it could be mounted in a different location (pretty much where some of the CAI's run), but the shop said that wasn't the issue.
Any suggestions on what to check? The shop informed me that AEM has zero support for this unit now, so not even sure where I would have it checked out at. The unit was brand new in box when I handed it to them.
Thank you for your time.
It's a V1 unit, AEM UEGO wired in, second pump controlled by the A/C relay pin since I took the A/C out, and wired with the AEM boost solenoid. The shop did extend the harness from the AEM to the stock PCM so it could be mounted in a different location (pretty much where some of the CAI's run), but the shop said that wasn't the issue.
Any suggestions on what to check? The shop informed me that AEM has zero support for this unit now, so not even sure where I would have it checked out at. The unit was brand new in box when I handed it to them.
Thank you for your time.