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Re: M runs poor at high rpms
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Posted by Janicholson on November 22, 2005 at 11:52:57 from (199.17.6.175):
In Reply to: Re: M runs poor at high rpms posted by THANKS FOR THE REPLIES on November 22, 2005 at 06:32:50:
If it checks out in the "getting fuel" arena as others indicate try this. With a point gap of .020, any slop in the Distributor cam shaft bearings can cause this rough running symptom. Wiggle the shaft that the roror slips onto. If it moves up and down, or sideways enough to detect the movement, it needs to be measured for real. The shaft should have no more than .0015" of movement up/down in/out. If bad,I would have the distributor rebushed, and run an electronic ignition. As the speed increases the centrifugal advance probably moves the shaft and things are getting outside operational acceptability. There is no way the timing can be even close with much cam angle variation. Some cylinders will be ok, but others will be way off (as much as 20-30 degrees. That is a great way to hole pistons. Good luck on the repair. JimN
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