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Reply to "High altitude move - stumbling"

Those jets you show are the mains. You might want to go down on the mains from 115 to a 110 or a 105.

The ones that make the most difference are the idles: i.e. under 3000 rpm, where you drive a LOT. Those jets are in picture #4 under the fuel hose under the slotted brass screw.(I'm going to guess you have .50 or .55 idle jets) They may or may not be the size that's on them.

You may also have to reduce the amount of accel squirt as well.

All due to the thinner air, but 3500 feet isn't that high. I didn't re-jet for my trip to North Carolina and we got up as high as 6000 feet. Nobody else did either.

It is possible your car is jetted too rich as is for the lower altitude, and the 3500 feet just pushed it into pig-rich and undrivable.

Or most probably, a plugged idle jet...I'd clean them FIRST and see how it goes. If it still runs like crap, look into smaller jets.

Last edited by DannyP
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