fuel on top of center piston

white smoke maybe coolant in cylinder, black smoke fuel mix to rich,could use a few more details to help

Grey smoke is unburned fuel from incomplete combustion.

Most noticeable during cold starts Black smoke comes from

two different scenarios: 1) too much fuel for a given amount

of combustion air. 2) Not enough combustion air to support

a given amount of fuel.

I suggest you first check to make sure your air filter is clean

and unrestricted (that is probably okay since we are only dealing

with one cylinder). Do a compression or leak down test on all

cylinders – remove all injectors when performing this test.

You say all the injectors tested good, what does the test report

reveal?

This site is getting squirrely again.

Time for a tune-up Hal.

What did you learn from this experience?

p.m. it is a good thing keeps your hair in place vs. jerking it out