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I've had problems for about 4 months with my 2004 Impala 3.4L, after replacing parts after parts and got it finally running the best it ever has, then the engine light came on with a code closed EGR valve, I had already replaced this a few months back so I'm a little &^%*.

The strange thing is, is that it ran fine, actually great, even with the engine light on and the same code. So I removed it and carb cleaned, also carb cleaned the housing it mounts to and there was some carbon build-up. Still, the code came up again, so replaced it and put a brand new one in, I made sure the valve moved easily, no hang-ups, blah blah blah. Tried to start it and it ran like crap for a few seconds and then died, same code EGR closed position.

Does anyone know if I need to do something before I remove it or something before I install it, put on am, push am button twice, click my fricken heels?? The Haynes book doesn't mention anything?
 

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