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misfire???

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misfire
4K views 12 replies 4 participants last post by  Marty1979 
#1 ·
got a renault megane coupe 1.4 16valve and has a misfire changed plugs and a couple of coils took it to renault they said its the cat of all things, anybody got ideas feedback would be appreciated.

_woo
 
#6 ·
Ok then, what I would do is check for any leaks on the intake side of things, check vacuum pipes for leaks also as that would cause misfire and poor idle. If you can't find any visible problems with the hoses and pipes then I would look at the fuel pressure regulator or fuel pump as there might not be sufficient fuel pressure entering the engine. Also your injectors might be cacked up or faulty. So many things but if you start with the easiest then you might catch it before you have to spend any more money. Hope this helps:d
 
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