OK, I thought I missed something.

Please allow me to clarify, #4 plug did not carbon up, the reason I replaced it and thought it solved the problem was due to a very slight porcelain hairline crack on the plug (NGK TR 55) which I assume may have happened when I installed the plug. I thought the problem went away on my return trip from Florida couple months back but the problem is still there and to the same extent.

I tried to edit the last thread to include, "the engine runs fine until I put it under load as in driving up a hill or max acceleration", but couldn't find the edit button.

I'm still going to suggest pulling the valve cover. Had a car here a while back with a bad misfire on #6. It would idle find, drive fun, but as soon as you started getting on it there was a miss. We swapped plugs, wires, coils, ICM, injectors, did a compression test. Nothing corrected the problem and all tests came back normal. We removed the valve cover and found a broken spring on the exhaust valve.

Thanks Dan and Bill, if the problem persists then I'll have to look into it further. At the moment the Bonne is driven to work by Cathy, and Mick drives it in the evening to go see submarine races.

Sorry I never returned to this thread in sometime. By replacing the plug wire it seems to have gotten better. Since posting I developed a severe miss on #3 plug. This is know by way of the aeroforce scan guage. I replace #3 plug wire and it seems much better. I guess the 2 year old beldon wires are due to be changed. I should pick up a set of new wires next time I visit the ol US. of A. I think I may go with another brand next time around.

A set of new OEM wires will work just as good as any other brand.

Beldens while being "lifetime" (with the original receipt, box, salespersons name etc etc) don't seem to last as long as I'd like.

I've had good results from Autolite Professional and AC Delco'*.

Belden warranty isn't helpfull to me in Canada therefore A/C Delco would be a good replacement. I'll have to keep an eye on for a sale....maybe States side.

Thanks Dan and Bill.

If you'd like I can get a price from Ed. You remember the subframe bushings guy.