Thread: Misfire when getting boost on 99 gtp help!!

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  1. #1 Misfire when getting boost on 99 gtp help!! 
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    My car starts and runs perfect but when I get in the throttle to pass and one or more blocks appear in the boost gauge the engine misses like crazy. I kept my foot into it and got a po300 code. Cylinder 1 random misfires. It missed 760 times. I figure it's either the plug, injector, wires or coil but before I go tearing up the car has anyone else had this problem?
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  2. #2 Re: Misfire when getting boost on 99 gtp help!! 
    GTP Level Member 01gpgt01's Avatar
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    Well you know the cylinder, you can swap coils around and see if the mis follows you can also do that with the injector. If the plugs and wires are old probobly a good idea to replace those.
    2001 GT. A few here and there mods http://www.streetfire.net/video/2001...ynp_208097.htm

    2009 Hummer H3 Solar flare premium
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  3. #3 Re: Misfire when getting boost on 99 gtp help!! 
    The mod from over yonder TheOtherNick's Avatar
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    Replace your plugs and wires
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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