Miss fire

[497adam]

The 172 has developed a miss fire which is worst when warm, under load and at lower revs. Just had inlet off and checked leads but nothing obvious . It's had newish plugs. Leads are magnecor blue. Had a new coil pack about 18 months ago. Any ideas?

 

[497adam]

Engine light does come on when really bad

 

[The Fatty]

pics of this Miss fire? she sounds hot..!

no seriously, it could be coil pack again, or it could be a failing injector. If you have a quick search, you will find a thread where I explain how to diagnose the injectors to jesus.

 

[497adam]

Got spare coil pack so going to try that

 

[iOllieSM]

With the coilpack did you buy genuine renault? Just because on my old car I didn't, and it went through 3 in a year. Learnt my lesson the hard way - always buy genuine!!
Otherwise injector possibly as said before

 

[497adam]

Yeah was a oe one.

 

[497adam]

Just weird only starts when warm