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2000 , 1997, & 1992 Devilles
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Discussion Starter · #1 ·



Hello, recently purcased 2000 deville northstar engine. I am getting code PO300 engine misfires. I have checked and replaced the plugs, have no vacuum leaks. Checked the EGR valve. No clogs in the catalic converter, no leaks. I suspect that it may be related the the ignition module or the coil, but I am not sure. Need advice or expertise please.

Thanks
 
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