Rough running Roush 427R

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#1 (permalink)

08-10-2012, 06:52 AM

Goopie 18

CC Member

Join Date: Jul 2005

Location: Punta Gorda, Fl

Cobra Make, Engine: SPF 2473, Roush 427R

Posts: 203

Not Ranked

Rough running Roush 427R

I have a Roush 427 R, Holley 770CFM carb, MSD ignition. Car starts right up but idles rough and seems to miss a speed. Very erratic at low and High RPMs. I have replaced the MSD box, new plugs, new rotor/cap, new coil, new fuel filter/mechanical fuel pump. Twin filters in Holley are spotless. Fresh fuel. Timing OK. Ignition wire continuity good. Magnetic pickup in coil reads proper OHMS. I'm stumped.

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