I have just bought a 1994 Ford Explorer with a 4.0 engine. When it starts it will idle very bad until it warms. I replaced the MASS sensor and same thing still happens.I can unplug the MASS sensor and it will idle very bad but it will stop running when I plug the MASS sensor back in.
Problem number 2: It will not shift properly. I use it in the OD selection and it takes it almost forever to change into the higher gear. Dirty filter?
