V6 Experts, 'Random Multiple Mis-fire'

[adamlstr]

The old man has a Avantime on his fleet to float about in occasionally.

It has a re-occuring issue where by once it's hot / up to temp, it starts misfiring and cutting out. It then won't run or start properly until it's cooled to virtually 'left overnight' kind of temperatures.

Now, this lump is the one found in the Espace too, and perhaps maybe the Clio V6? It's had the plugs and every coil pack changed, ruling them out.

The only fault code is for 'Random Multiple Misfire'.

Has anyone any ideas / had any experience on these?

Ta

 

[Fred@BTM]

could be a lambda (they have 4) but are you 100% sure it has the correct plugs and decent (ie non cheapo) coil packs that are all matching?

 

[adamlstr]

It's been through two set of coil packs from ECP Fred, but they were Valeo items, all changed at the same time. (To my mind, same as OE?)

The plugs used were NGK Iridiums I think.

Can a broken Lambda produce that code then? I know RMM is very generic, but wouldn't O2 give a bank and location code?

Thanks for the reply.

 

[Fred@BTM]

its a renault, they make it up as they so choose!

 

[adamlstr]

Lol.

Although you make a point, could be O2/Cat related. What's the Air Mass / Flow Meter like on them? French like everything else?

 

[veet-S]

sounds a lot like coil packs still aren't fixed, they're known for it right?

 

[adamlstr]

sounds a lot like coil packs still aren't fixed, they're known for it right?

Very much the common fault, but all 6 have been changed twice!

 

[Fred@BTM]

Lol.

Although you make a point, could be O2/Cat related. What's the Air Mass / Flow Meter like on them? French like everything else?

not sure on the avit time but the V6 clio doesn't have a maf

 

[adamlstr]

Hmmm, the plot thickens.