Originally Posted by
Kiwibruce
2 of mine have a waxy substance in the jets, mechanic has no idea what it is
Well, that' is a bit odd - he does not know what it is?
What CAN it be but residue from fuel that was not of the quality you wanted it to be?
ALL that goes thru the injector is gasoline, or what ever is in the gas tank.
I'd be taking a close look at the other injectors.