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Old 08-20-2008, 05:42 PM
madmaxx madmaxx is offline
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Default Help, it will not start! Roush 427sr with MSD

I hope someone can help. I have a roush 427sr/tw. It will not fire, plenty of fuel. Initial investigation found the MSD distributor cap button eroded away, on the MSD distributor. The cap was replaced with the rotor paddle bent up to ensure contact. All spark plug wires under 1200 ohms. The car has the ford duraspark and factory coil. I replaced both the coil and the duraspark module. No start. Both the new and old coil had the same primary resistance of 1 ohm and secondary resistance of 10K ohms. I am pretty sure it is not the coil.

I checked voltage at the coil connection, with it disconnected I get 11 volts with it conected to the coil I get nothing even when cranking the engine. I checked the resistance in the distributor magnetic pickup and it was 900 ohms in the middle of the allowed 400 to 1300 ohm range. Since I am getting voltage at the coil connection when not connected to the coil I would assume I should get a spark to jump out of the coil wire.

Is there any other checks to verify the magnetic pickup is working besides resistance? I assume since I am getting voltage at the coil connection bracket the ignition module is working.

Any ideas? Car was running perfect drove it all day, went for one last ride and it would not start in the garage.

I appreciate any help!!!
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