|
With the high tickover and white plug, it certainly sounds as if the vertical cylinder is running weak. I wonder if you've got an air leak on the intake side for that cylinder.
I read back through your posts and, at the beginning, you said you removed a Scottoiler. They're operated from the intake vacuum, aren't they? If so, was the vacuum feed properly blanked off? If not, it could be drawing air through there causing it to run weak.
If it's not the Scottoiler, I'd still check all the intake plumbing for splits or leaks. With the engine running, you could try spraying small amounts of Easystart or carb cleaner on to the plumbing. If the engine speed changes, (as the fluid is drawn in through the hole), then that's where the leak is. (Be sparing with the spray as the fluid is, of course, highly combustible.)
|