carb popping 6 this time, everybody loves carb threads Options

[dem]

Drove the 914 to turkey time yesterday, about 50 miles of backroads. Seemed to be runnin' about normal with the usual symphony of only-occasional random backfires and pops. It was, of course, ridiculously fun.

Car sat til I left around 10 PM, and by then it was around 40 degrees outside. Lots of popping and stuttering at part throttle. Full throttle and it was the usual fun excitement.

The ride home on the freeway was unpleasant because the 2.7L doesn't need much throttle to keep my little car moving. Could this just be temperature related? Idle jets sized for Los Angeles (where I bought it.)?

Otherwise I assume I'm looking at checking for gunk in the idle jets, I assume.

This is my first carbed porsche, so I guess it is time to really "grok" them. Is there an obvious "start here carb newbie" direction? Book and/or web site? Googling turns up tons and tons of random stuff.

Thanks.

[sww914]

The inside of the engine doesn't care how many turns out the idle screws are, it cares if the mixture is right. There will be differences between cylinders. 2 1/2 turns is a good starting point but once you've started it you need to adjust the mixture. Turn each screw in 1/8 turn at a time until it begins to fall on it's face, screw it out again until it purrs, plus 1/8 turn. You're a beginner, that 1/8 turn extra may save you a ton of money, pistons aren't cheap.
Any cylinder that doesn't respond to the mixture screw has a problem, usually a clogged idle jet, sometimes O rings as you've learned. All those O rings have to be in good shape. It's not uncommon to foul idle jets several times in a row because there's probably more than one little piece of junk floating around in there.