i have a 94 explorer and my truck has alittle sputter to it and when im driving when i use more gas before i press down for the passing gear the truck shutters (vibrates). my spark plugs are cream colored i will clean them tomorrow gonna change them out for double plats but if this doesnt fixes it what else can it be? i have no check engine light but i did do a code reader and it came up as a mass air flow senser but that wasnt the problem and i even left the battery disconnected over night.

 

Plug wires are a possibility.

 

had those replaced with motorcrafts

 

i think i may have found the problem i have a 94 explorer and i found out that the motor from an obd2 how could the shop that the dealer sent it to not notice it? its been a yr since the motor was put it.