My 2006 Ford Freestar seems like trannies slippin. Up hill is the worst. Fuel injection or tranny? Engine lite is on.
Manual? Could be worn clutch, Automatic? Start by checking fluid level, and as for the CEL the best way is to get your OBD codes scanned, eliminate a lot of guessing. Many large parts houses will scan it for you free.
Sorry for the delay and thanks for the input.