Slight misfire

[phillv6]

I've got an annoying issue with my Vee :rollseyes:

A couple of weeks ago I had a coil go, easily sorted at the roadside by fitting a new one, the next day another one went (I remember two coils have gone pop previously one after another), sorted again as I carry two spares.

Later on the same journey I could feel a slight misfire again but only at low revs on a small throttle opening, in order to sort the issue I've now changed all six coils and fitted a new set of spark plugs - it did seem OK initially but the problem has reappeared :rollseyes:

In all other respects the car runs fine, on full throttle it picks up fine and revs cleanly right to the red line, it's only when feathering the throttle that I can feel the misfire.

The engine management light did come on when the coils failed but remains unlit with the slight misfire.

Has anyone had a similar experience to this or any idea as to what could be the issue ?

Thanks,

Phill

 

[Budgie895]

I think that you'll find that most of the advice will be dont drive it then! Just detail it!

Sorry! I just couldn't help myself :evil:

 

[dal.a]

Bringing this up from the dead as I have the same issue.
No codes, no engine light.

Coils and plugs are 1k old and it doesn’t feel like when one of those have gone.

Any ideas?

 

[p4cks]

It's always the coil pack

 

[dal.a]

I’m going to go trough the motions this morning checking each one.

The issue I’ll have is that it idles perfectly

 

[dal.a]

So one of the easy ones made no difference when unplugged, I put a new OEM pack in and now it actually changed when unplugged as do the other 2 easy ones.

But it drives and misfires worse than before now [smilie=icon_cry.gif]

 

[p4cks]

Maybe the plugs themselves?

 

[DaveL485]

Have you gapped the plugs?

 

[dal.a]

I changed all 6 plugs and the rear 3 coils and it’s running perfectly now.

The plugs were very dirty, I’m presuming from over fuelling.

 

[dal.a]

A quick update on this.

After a few long runs it’s not come back, hopefully that’s the end of it. I won’t hold my breath though.