Bosch aux air regulator
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Bosch aux air regulator
Also, if I'm using a MSD ignition, do I need to install the ignition control jumper on the mainboard for this MS-II feature?
Thanks in advance for your help!!
Gary Tew
Phx, AZ
1967 Datsun 1600 Roadster
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msoultan
- Helpful Squirter
- Posts: 58
- Joined: Sun Jun 27, 2004 11:04 am
- Location: Long Beach, CA - USA

If so, leave the fast idle relay in place! Then, there is a small jumper location on the relay board with 3 holes. You want to connect the middle hole to the one that says "V". This will apply 12v to regulator instead of grounding it (grounding would do nothing).
Then, in Megatune, go to output port settings, select FIdle, enable it, variable should be coolant, select ">", set your threshold temp for when you'd like the regulator to close (drop RPMs), set hysterisis to 10 (so the relay doesn't go on and off while it's hovering around the threshold temp), and set the power-on value and triggered value to 1.
Disable any other idle control!
The reason you have to do this is because the bosch regulator drops idle when current is applied, not the other way around.