156 V6 missfire??!!

Hi Guys n girls!

I need a liitle advice for my darling 156. It has developed a missfire. When cold it runs like a dream when it gets to 60ish degrees it starts coughing and spluttering? Maf chaned 11 months ago. No leaks on air intake, exhasut all sound, plugs approx 40K old (have checked the easy ones and look ok!) When stood it starts to miss and stinks of catylist any ideas? like I say great when cold, really getting me down not to have her running properly!!

Coil pack or sparkplug...at a guess, try and see if there is someone local to you with alfadiag...

another vote for ignition, most likely a coilpack.

I am going for spark plugs...

Shouldn't this be a poll


Chris

Just printed off how to do rear plugs so will try that!!

In Lincoln not sure where to go for diog any ideas. Garage I normally use def not got one!

Cheers.

Just one more note which may effect things when i took out the front plus there was water in the plug channels, probably from when i had some body work done a while back and i noticed they had valeted inside the engine bay most likely with a power washer / steam cleaner. could this Kna**er up the coil pack??

Might not knacker the coil pack but may not get a good spark dur to the water grounding the coil pack...

Changed the rear plugs and did throttle reset. All seems ok now touch wood!! Doesn't seem to have the kick she had before but running a smooth as a nut. Big thanks guys!!!