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starts but won't run

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Old November 25th, 2010, 7:03 AM
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Location: vernon british columbia canada
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Default starts but won't run

I just converted my 1998 3500 dually crew 4wd from diesel to 7.4. When we tried to start it it will fire but then quits. I take it this could be the computer shutting it down for some reason?? The security light flashes sometime when you turn the key on and other times no. I still don't have O2 sensors on the exhaust hooked up, can that have an effect like this?

many thanks
Rick
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