How did the Weber fair through the winter? Also wondering have you experienced any negative side effects from the "hill climb mod" you did? I've heard that you can experience stalling and hiccups going downhill after the mod.
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Well I took the 4runner out of service in November. It did get pretty darned cold (single digits) during that time and I had no issues with the cold start at all. It was I fact as good or better than the stock carb at those temps. I did not get to try the Weber in the super sub-zero we had all winter though. As far as the hill climb mod; I ran it at all angles up, down, sideways with no issues of any kind. Not sure why it would produce a hiccup since it doesn't effect the bowl and nothing can spill into the carb but maybe I am missing something. I think as long as you vent the bowl to a charcoal canister instead of the carb you would be fine. If you dump the new vent back into the carb then it would certainly flood down hill.
I am going to be using this carb on my 1980 pickup and should have it going soon. I'll try to find a stupid steep down hill and see if I can make it burp.