[TR] Rough idle tr4

[Randall]

> I am having problems with my 62 TR4 idling. 

That would be SU H6 carbs, right ?  My guess would be mixture jets not
centered, or possibly the pistons rubbing on the domes.  They must move
absolutely freely or it will screw up the mixture.  And the jet centering is
most critical at idle, when the needles almost fill the jet opening.

Remove the plungers and check that the pistons move absolutely freely when
you lift them, then land with a distinct click.

Randall