on caravan 97 3.0l
do it's true the champion spark plug are the best for this vehicule?some body tell me it,s the only spark plug good for this vehicule.

 

IMO I think most plug manufacturers are about the same the only real difference it what the core is made of platinium will last longer, but regular copper ones do last a reasonable amount of time I would stay away from multiple electrode one's though as I have heard that many engines don't like them and tend to cause misfiring. To best discribe plug makers is that they are kinda of like gas some people like shell gas some like BP and some don't really care I personally have usedboth champion and bosch I find thatthey work the same, they both make spark the only thing to consider is how often you want to change them as in caravan they are not fun so you might want to choose platinium as they will last longer and you won't have to change them as often however they do cost more, but most plug makers today make both just make sure they are the right type for youvan and gap them properly

 

ok because when i change my spark plug,the older one was champion,so i put ngk v-power.but now i have missfire.ok before change the plug the idle was little bit stumble,i was thingking the problem will be ok but no.

 

make sure all the plug wires are on good might be a loose plug wire