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Missfiring 172!!


I have had a problem for a while with my 172 missfiring. A couple of months ago my coil pack went and it was on 3 cylinders.

I changed the coilpack along with NGK plugs. The car seemed to be okay again until i drove a few miles. Once the car heats up it missfires again!!

This has been happening for a month or so and is really doing my head in. I cant understand why it runs perfectly when i just start it and its cold.

Could it possibly be the leads or a duff coil pack again??


  RS CLIO 197
back to basics

find out which cylinder its on first then go from there

could be either plug lead or another faulty pack or even a bad connection
  Pug 205 gti
leads? my coilpack went on my old ph2, then did the same thing as yours. a cheap set of leads from a local factors sorted it out
Might be better taking it in for a diagnostics check? Pin point the exact problem rather than throwing money on random parts as a process of elimination.