Mazda 2002 MPV cylinder 3 missfire

no...no indication like this at all....this is maddening...no other clues, other than i started misfiring..gave a cylinder 3 misfire code, we replaced all the plugs, and put in a cylinder 3 coil; it was still running ragged, but no check engine light to give us a code; about 50 km later, check engine light comes on, gives a cylinder #6 misfire..put in new coil, runs for 39 km, then w/o driving it for about 3 days, get in to drive, check engine begins flickering, then staying on, then flickering, runs ragged/missfires, then gives a cylinder #3 missfire code again! what do I do..i am afraid to drive the van any more no...no indication like this at all....this is maddening...no other clues, other than i started misfiring..gave a cylinder 3 misfire code, we replaced all the plugs, and put in a cylinder 3 coil; it was still running ragged, but no check engine light to give us a code; about 50 km later, check engine light comes on, gives a cylinder #6 misfire..put in new coil, runs for 39 km, then w/o driving it for about 3 days, get in to drive, check engine begins flickering, then staying on, then flickering, runs ragged/missfires, then gives a cylinder #3 missfire code again! what do I do..i am afraid to drive the van any more

what motor is in . lets do a test on the injectors.. take out any injector and swap it with number injectorand put number 3 where you took the other out. please be careful of the o rings.. start is and check leaks and drive it,and if the light come back on ,and if it is now the cylinder that you put the number 3 in..then you have a bad injector. but if it is still coming up with cylinder 3 then you have a stuck valve.iI am self employed,and I do a lot of head gaskets and motor rebuilds. if you want add me on facebook send you my link, when you are on my page just comment on it and I will add you.maybe easy to go through your problem thank you tedhttps://www.facebook.com/TedsRepairs what motor is in . lets do a test on the injectors.. take out any injector and swap it with number injectorand put number 3 where you took the other out. please be careful of the o rings.. start is and check leaks and drive it,and if the light come back on ,and if it is now the cylinder that you put the number 3 in..then you have a bad injector. but if it is still coming up with cylinder 3 then you have a stuck valve.iI am self employed,and I do a lot of head gaskets and motor rebuilds. if you want add me on facebook send you my link, when you are on my page just comment on it and I will add you.maybe easy to go through your problem thank you ted https://www.facebook.com/TedsRepairs

hi tedd s.....it is a 2002/MPV LS 3.0 litre....i am going over to the mechanic's shop where the #3 coil was put in...can you pls add me to your facebook; i will try to do it from my end but don't know if I am that f/b savvy hi tedd s.....it is a 2002/MPV LS 3.0 litre....i am going over to the mechanic's shop where the #3 coil was put in...can you pls add me to your facebook; i will try to do it from my end but don't know if I am that f/b savvy