The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post

geezer#99 · 12-14-2023, 12:26 AM

Modulators are adjustable. Poke a small flat bladed screwdriver in the end of the nipple and contact the pin inside. Turn the screw out 2 turns, hook the hose up and test drive.
If it gets better try another turn.

12-14-2023, 12:26 AM	#7
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,521	Re: ing at high RPM Modulators are adjustable. Poke a small flat bladed screwdriver in the end of the nipple and contact the pin inside. Turn the screw out 2 turns, hook the hose up and test drive. If it gets better try another turn.