My unusual airbox leak

[tazzieman]

Been chasing a little vac leak recently without success, hunting idle problem = rich mixture etc. Leaned it out a tad and it ran beautifully for a few days until it backfired and hissed menacingly as I was about to depart home one rainy evening.

First thought was "Pete Zimmerman was right" when he says in his book "the airbox is gonna get you one day , no matter what!"

My box seemed OK and has the toilet lid and diffuser. Spent an hour in my underground park looking for troubles - found a disconnected thermovalve 2 pin connection (how?wtf?) . tried richening her up but engine wouldn't stay lit. Had to push it out of the park onto a flatbed in the end..

Well they found a finger sized port under the box , in line with the thumb below which had ejected a plug of rather brittle "aftermarket" white plastic putty!



Not sure what this port is but maybe part of the former smog pump plumbing?

Anyway now it's properly sealed and while they were there - all new gaskets , runner sleeves and the like so hopefully on Monday it will be running like a Swiss clock.

Ticking over , but not hissing like an angry snake about to pounce!

[crustychief]

Good save!