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Ford:
Your EEC code is typically found on the main (large) harness connector of your Electronic Engine Control (EEC) Module. The code will typically be a 3 or 4 digit alpha-numeric code, shown in a larger size, bold font. Older vehicles will have a 3 digit code, such as A9L, while newer vehicles will be 4 digit, like GTG3. Check out the examples at Ford Fuel Injection.com. In many 2000 and newer vehicles, you may also find the EEC code on a small white sticker found in one of the door jambs.
Your EEC location differs depending on the vehicle. For 2004 and earlier Mustangs, the EEC is found behind the passenger side kick panel, under the dash. For 2005 and newer, the EEC is located in the engine compartment on the passenger side front. For other vehicles, consult the list at Ford Fuel Injection.com GM: For early OBDI GM vehicles, your EEC part number and calibration code are typically both needed. Part numbers are typically found on the main (large) harness connector of your Electronic Control Unit (ECU), and will be a 7 or 8 digit number, such as 1227730. The calibration code will typically be a 4 letter code, found near the part number, such as AUJP.
For OBDII (1996 and newer) GM, your stock calibration may need to be read from your ECU by us, or by you and emailed to us if you already have a flash tuner. As a minimum, we need your EEC part number, and VIN. Chrysler: For Mopar vehicles, your stock calibration will need to be read from your ECU by us, or by you and emailed to us if you already have a flash tuner. Calibrations are typically 8 numbers followed by 2 letters, such as 05030377ag.
If you have any questions concerning your EEC Code, please contact us.