Originally Posted by grunge_ryder
... The SDS freezes the ISC plunger at step 58 so the valve won't move to adjust the idle speed as the mechanic tweaks the two throttle body air screws.
So, if a throttle body sync is performed without using the SDS tool to freeze the ISCV plunger, and so long as the rpm remains basically constant, what would be the problem?
No matter the position the ISCV plunger, it bleeds air equally
to both cylinders, no?