Great! Now send your bad EEC to the ECU Exchange:
Ford Mustang 5.0 A9L A9P C3W A3M X3Z ECUEngine Computer Repair ServicePlease fill out the R&R form here once you've placed your order.A Trusted Product with LIFETIME WARRANTY QUICK TURN AROUND TIMEDomestic and International Shipping available! Our Team is Available Monday - Friday 9am to 5pm...
www.theecuexchange.com
Your gut feeling about the chip is 100%. If it's off-the-shelf, it's garbage. If it's tunable, you have no idea what's on it. It might make the engine rev to the tune of the National Anthem, for all we know.