Hitachi carb, when opening the throttle from under the hood, when should the second jet start working ? I rev it up, but only squirting out the main jet. Excuse my lack of knowledge....newbie here

The accelerator pump only squirts on the primary circuit.

P.S. Welcome to the board!

Thanks Ed , so the other jet fires when ?

Thanks Ed , so the other jet fires when ?

Only under load - so you the car would have to be moving - vacuum actually opens the second barrel (it increases with load).

cool, thanks 85sub4WD, now I understand .

Only under load - so you the car would have to be moving - vacuum actually opens the second barrel (it increases with load).

my hitachi on my 86 5 speed wagon opens with out load i can stand out side the car and rev it and about a little more then half throttle.

my hitachi on my 86 5 speed wagon opens with out load i can stand out side the car and rev it and about a little more then half throttle.

I think they vary with adjustment of the mechanism - there are several different versions of carbs for the EA82 - I think each model year is slightly different and then beyond that there is a difference in 2WD vs. 4WD and auto vs manual tranny plus you are int'l, so it probably has a different carb alltogether- my secondary never opened at idle - if you look at the back of the carb on the side opposite the throttle cable, you can see the vacuum actuator for the secondary throttle