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#1
06-20-2008, 03:16 AM
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Misfire Cylinder # 3
 2000 gtp error codes po203 (injector circuit open cylinder 3) and po303 (cylinder 3 misfire) i think i need to replace injector # 3 and was wondering if anyone has gone thru this procedure? looking at the chilton manual it seems possible to do on my own i am just a bit confused on if i need to remove the whole fuel rail assembly or can i just pull out injector # 3 by itself without taking off the fuel rail. if anyone has any info on this it would be greatly appreciated. //
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#2
06-20-2008, 05:58 AM
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Re: Misfire Cylinder # 3
Welcome to AF
Replacing that injector will require removing the fuel rail. Before you blame the injector though, double check the wiring to it, as a wire could be broken and/or cut. A noid light would let you know you're getting signal to the injector, which would let you know if it's an injector or the harness.
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#3
06-23-2008, 10:02 PM
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Re: Misfire Cylinder # 3
It seems to me that these pontiac's have a thing for misfire #3 cylinder! I would check the wiring!
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