Here is one for you as I am unsure about the luck I may have.
My V6 ran on 5 cylinders at idle and was lumpy but very good driving and through the revs and didn't miss, except the other day when a mile from home on the outbound journey it just ran like a proper bag of spanners and was missing completely.
Turned straight round and parked up ready to do a full plug and coilpack change as I had just bought new ones.
Last night I removed the plenum etc and got nos. 1 and 3 plug out and swapped and then no. 2 as the coilpack screws were very tight. The plug was very loose though (finger loose) and when I pulled it out. ****, there was no electrode bar on the bottom of it.
Now I know why it was running on 5 and retreated with horrible expensive thoughts as where was that electrode bar.
Been to see a friend and an endoscope is on its way but he was bemoaning his son and his untidiness in the garage whilst changing engines on a Fiat. This spurred me to tidy my gararge area ready for the hunting of the electrode bar.
I had even tried the vacuum with ever decreasing pipes to suck anything out of the piston chamber to no joy. Then I gave up and put the vacuum back and picked the Plenum up to put in the boot out of harms way, when!
The plenum rattled and after a little shake out popped a straight piece of metal with a copper core and was the same size, shape and markings and break out point as on the spark plug extracted. There is even a circular (valve) straightening mark on it. Plus on the throttle butterfly a mark like a screw driver running up it on the outside.
So folks, how the hell does the electrode bar come out of the inlet valves and possibly out of the throttle body and back in?
I am at a complete loss, can anyone shed any light on how this has happened and am I one of the luckiest sods around at the moment. (That is hoping the valve seat is ok after been used as an anvil but they are hardened aren't they!!)
I hope someone does have an explanation please.