I took them from a frrestar and put it in my winstar

i would look for an external leak first. there are many places that fuel can leak. have a shop check it for you. you should never put used plugs in your vehicle. for 1.99 a plug, it is well worth replacing with new. Roy

Codes don't tell you plug or wire. They probably say cylinder misfire. Could be base engine issue, valve train issue, fuel injector issue, coil issue, plug issue, wire issue Lots of possible causes - needs a good diagnosis before throwing more parts and effort at it.