Well not yet checked for a misfire, I will check this tonight. From what I have read one way to check which one is faulty is to simply use one new
to change out each of the existing ons, one by one. When you notice a difference you have found the failed
. They work in pairs 1&4 and 2&3. So you only replace 2 - the failed one and it's partner. In answer to your question about why I would replace all four, I guess I just figured that they sound like they go pretty regularly on the Renaults and so while I was at it... I found some pretty cheap ones online:
That might be a bit too cheap though and maybe I would be better going for something like this:
As you say though, if I don't find a misfire it could be something else. That scares me. I guess I am going to have to take it to a garage. This car has cost me almost half its value in repairs in just one year!!! Not very happy with it.