Baseline for CIS Idle air bypass adjustment screw?

[Bear911]

Starting with a 3.0 Bosch K-Jetronic (early non-O2, no thermo switch) CIS that has been apart and not run yet, does anyone have the definitive baseline setting for the idle air bypass screw on the throttle body (aka idle speed screw.)

I'm looking for the amount of turns the screw would have been set by the factory originally i.e. before starting the motor and setting the value properly.

(Searching has proven fruitless because invariably the thread contributors confuse the idle and mixture adjustment screws and before long it turns into a seven page troubleshooting thread with no end The answer has to be on the BBS somewhere, but I'd be damned if I could find it!)

[stlrj]

You will not find a baseline simply because there is none. The bypass is nothing more than an idle speed trim adjustment and every engine is different. I would back it off one turn and go fire her up. Once the engine is warm, you will know if more is needed.

[Bear911]

Thanks. Ok so full in and then one turn out?

I find it hard to believe that Bosch never had any recommendation.

[E Sully]

Just about every mixture screw I have on my cars and motorcycles has a baseline of around 1 1/2 turns.

[stlrj]

Originally Posted by E Sully

Just about every mixture screw I have on my cars and motorcycles has a baseline of around 1 1/2 turns.

But none for idle air bypass which is different from mixture.