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Rough running Roush 427R Rough running Roush 427R
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Kirkham Motorsports

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Old 08-11-2012, 08:49 AM
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Did you replace all those items because it was running rough or did it start running rough after you replaced the items you mentioned?

Did you check base and total timing with vacuum removed from dizzy? (if applicable)

Is the coil you replaced the proper primary resistance for your ignition? 1.5Kohm or .700Kohm?
Last edited by TButtrick; 08-11-2012 at 08:53 AM..
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Old 08-11-2012, 09:31 AM
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Valuable responses. I started replacing parts after rough running. Didn't know if problem was fuel or spark related. My holley was built in 2005 (this was a recalled carb due to flaking of alloy walls inside carb. I'm going to open up the carb and inspect/clean it.
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Old 08-11-2012, 03:02 PM
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Default Always Blast the Air Bleeds First...
Have you blasted out the air bleeds? I've written about that on here at least a dozen times. It takes less than five minutes and, if that's the problem, it will be a night and day experience. See: Holley Carb Woes - DCDoug Pay Attention (Long Post) and This is new: stumbling/missing at idle/cruise speed for starters....
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