with the weather being cold now, will the cold air cause carburetors to run leaner? do people regularly adjust their mix a little bit richer for winter?

_________________
God took you away, then brought you back to me.

Your '75 has a thermostatic air cleaner that regulates the temperature of the air reaching the carburetor, whether the weather is cold or warm. The correct adjustment is the correct adjustment—an overly-rich adjustment is not appropriate or helpful, nor is an overly-lean one.

Of course, if that thermostatic air cleaner isn't working right (or the choke, or the heat riser, or the carburetor itself) then cold weather will tend to aggravate the problems!

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

i assume that also applies to the use of a 195 degree thermostat for winter. ie, on a properly functioning system the only benefit to the 195 thermostat is for the heat inside the car warming the passengers.

i know my carburetor is crap. i know the air cleaner needs to be replaced. i know the heat riser moves freely but i need to check if the springs are still functioning as they heat up. choke works well.

i am having hesitation only when the weather is cold. until i get a new carb on there would a 195 thermostat help that or cause more problems?

_________________
God took you away, then brought you back to me.

You can do that if you like. It'll net you a little better fuel economy. Heater performance is just fine with a 180° stat.
Would neither help nor hurt that particular symptom.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

Also if your heater is not supplying enough heat flush it back and forth with the garden hose a few times , they get clogged somtimes and do not let enough heat through.


Set the carb via the Factory service manual settings for the choke unloader / choke pulloff etc.

I usually set my fast Idle screw a bit faster so I dont have any stalling in the cold weather with the auto trans.

Set it and forget it.

I also disconnect the heating element for the choke spring.

The heater makes the choke kickoff faster, I never have used it. Sometimes it will kickoff the choke before the engine is ready for that, and it stalls.

They were used on 73-up Models.

Greg

_________________
http://www.youtube.com/hyperpack

i checked the heat riser last night when the engine was at full running temp and it though it moves freely the heat riser was in the full clockwise position. ie, rotated towards the driver, just as it is when cold.
this means my springs are no longer responsive to heat, correct?
is there anything i can do to remedy this?

also, i am replacing the flex hose that goes from the manifold to the air cleaner. the function of this is to provide warm air during cold startup, correct?

_________________
God took you away, then brought you back to me.