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Old 11-13-2007, 05:33 PM   #6
GP99GT
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as billy said, GP's dont have a true dual system so the same exhaust is coming out both tailpipes. if the #5 injector is either dumping fuel in all the time or not dumping any fuel at all, thatll cause a rough idle...id suspect dumping extra fuel though, that would throw off your O2 sensor and make it run even worse
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