Hi,

Soooooo, are you saying it’s fixed by leaving the air filter out and all else hooked up?

Your post is a little confusing with out the word “LAST” before night for my time-line-ticking.

I think you are saying, that because it starts “sometimes,” that you think it’s not all within the scope of “not getting air flow.”
When it doesn’t start, have you tried a long spurt of starting fluid?

You can use a vacuum port or go a little more daring and put the vapor in front of the snorkel tube just for the air cleaner housing. Its opening is probably in between the grill and fender/radiator supports.
I do that while the engine is idling. A burst of propane vapor gives a test the reaction to my oxygen sensor and meter.
It has digital led lights, like a drag strips “Christmas tree” and is very quick to prove its not being lazy.

A question is … Do you think it floods or not getting fuel, sometimes?
It that or a spark tester or a timing light for a display.

Intermittent problems are so much fun but it’s not exactly the kind of fun that an amusement parks sells intermittently. (:-)

Phil