Sorry...another carby question

[Bro]

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

[beauregaardhooligan]

The accelerator pump only squirts on the primary circuit.

P.S. Welcome to the board!

[Bro]

Thanks Ed , so the other jet fires when ?

[85Sub4WD]

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).

[Bro]

cool, thanks 85sub4WD, now I understand .

[wintersubaru]

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.

[85Sub4WD]

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