Thread: WM Injection Pump and Idle
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Old 06-06-2012, 12:38 PM
tee51397 tee51397 is offline
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Join Date: Apr 2010
Location: Charleston, SC
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Quote:
Originally Posted by 47dodge View Post
basically the internal idle screw needs to be turned in(clockwise) about a 1/4 turn or so, and the external one backed off a bit.Be sure to back off the external screw before starting the engine. The external screw has more of an effect on how quickly it returns to idle, and the internal screw will set a firmer idle, so a/c will not change the idle speed, or at least not much. Here is a real good document about m/w pump thoery

https://docs.google.com/document/d/1QkAv-HFaLqpK_5wKCln6DODkfw_DkjBHVYZXm0nUtEw/edit?hl=en_US&authkey=CJXuhs0I&pli=1
Perfect info, and supports what I suspected. Thank you! Interestingly, when manually upping the idle to compensate, I can also feel feedback through the throttle at WOT as the governor kicks the rack back. That link completely explained why. I can't wait to tear into things for some reverse-engineering, better understanding and experimenting.
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