Hi Paul

I can't remember what the old plugs were - I have them at home - but I put in new Bosch plugs and the wires are Bremi. Coil is Bremi transistorised model as specified by the autoparts store.

My new "best friend" mechanic had a look at them and thought they were good. He had two possible culprits:

1. Rubber valve seals have hardened and oil is getting at the plugs causing them to short circuit and wear in a short time - he is trying to source a rubber conditioner and sealant that is added to the oil.

2. A possible short between the coil and the plug cap despite the changed items - I am changing the ignition coil tonight anyway.

If the problem gets no worse I will be happy as at the moment it is just an intermittent half second hesitation when taking off.

If it is the valve seals, then that's a different matter - will try the sealer, I think Gunk make one.

To be continued...

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John

1983 Mercedes-Benz 280E 115k miles
1986 BMW R1100 GS 40k miles