CLEANING the throttle makes a huge difference too. I wrote about this in a thread a while ago where I cleaned mine good and proper, including the idle and vacuum passageways, the end of the ICS "plunger" and the idle control screw (sent that with some other bits through my ultrasonic). Replaced the screw with a new O-ring and a dab of blue threadlocker on the screw so it stays in adjustment when set. Did this off the truck, so you wanna make sure you have a new throttle body gasket. Used almost an entire can of B12 Chemtool but I got a LOT of carbon and sludge buildup out of mine. When I reinstalled it I was able to turn the screw in WAY farther than it had been previously to get the idle back down to 700 RPM.Other things to check is adjusting the throttle
position sensor and making sure you have good fuel pressure. I’m chasing the same thing as well as a slow start when the motor is cold.
I would honestly do this before messing with the fuel pressure regulator. Even if one DOES end up needing a regulator, the throttle body is already cleaned and some preventative maintenance is done.
@blainehale tell me more about this vapor hone cabinet.....
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