BOB47 Posted May 26, 2007 Report Share Posted May 26, 2007 So my engine is throwing a P0300 code. Says "Random Multiple Cylinder Misfire". Any ideas? Plugs? Wires? Thanks for any input. Quote Link to comment Share on other sites More sharing options...
detjoe Posted May 27, 2007 Report Share Posted May 27, 2007 i would say give them a once over, see if they are rubbing on anything. I dont know what the conditions are for the code to get set, which might help understand how bad the wire need to be before they throw the code. Have you replaced your wire or plugs?? Does it run any different or stumble?? Have you gotten gas at a questionable station?? It is very humid here with all this rain so it might just be your wires?? Quote Link to comment Share on other sites More sharing options...
BOB47 Posted May 27, 2007 Author Report Share Posted May 27, 2007 Check engine has come on a couple times in the last 2 months but it goes back out in a day or so. Truck seems to be running fine. Get gas at the same place for the last year so I don't think that's it. Maybe I'll just put in some new wires and plugs and see what happens. Thanks Joe. Quote Link to comment Share on other sites More sharing options...
Bonj87 Posted May 27, 2007 Report Share Posted May 27, 2007 take off the metal boot covers.. that was my cause Quote Link to comment Share on other sites More sharing options...
BOB47 Posted May 27, 2007 Author Report Share Posted May 27, 2007 take off the metal boot covers.. that was my cause I'll try that. Thanks. Quote Link to comment Share on other sites More sharing options...
zac2005ss Posted May 29, 2007 Report Share Posted May 29, 2007 Im new to the form, don't have to many post up but just started to work on the SS. I got a P0307 code with the my check engine light on. Its going back to the Dealer on Thursday. Does anyone know what could be causing this so the dealer doesnt try to B/S Me. Thank Quote Link to comment Share on other sites More sharing options...
Bonj87 Posted May 29, 2007 Report Share Posted May 29, 2007 my bet is a bad injector on cylinder 7. that code is a specific misfire on that cylinder. hopefully it didnt wreck your cats too. Quote Link to comment Share on other sites More sharing options...
BenKey Posted May 30, 2007 Report Share Posted May 30, 2007 I can't see metal boot covers being the cause unless in some way it is keeping your wires from being seated all the way down on the plug. Take your wires off one at a time and re-seat them. Feel for one click on the plug end and you should hear two clicks on the coil end. I would do that and go from there - unless it has been quite a while since plug/plug wires have been replaced. Quote Link to comment Share on other sites More sharing options...
Bonj87 Posted May 30, 2007 Report Share Posted May 30, 2007 in my case, the metal boots were arcing against the exhaust manifold Quote Link to comment Share on other sites More sharing options...
BenKey Posted May 30, 2007 Report Share Posted May 30, 2007 in my case, the metal boots were arcing against the exhaust manifold I guess they definitely were your problem then....must've been cool at night? Quote Link to comment Share on other sites More sharing options...
BOB47 Posted May 30, 2007 Author Report Share Posted May 30, 2007 my bet is a bad injector on cylinder 7. that code is a specific misfire on that cylinder.hopefully it didnt wreck your cats too. You talking about mine or zac2005ss? I can't see metal boot covers being the cause unless in some way it is keeping your wires from being seated all the way down on the plug. Take your wires off one at a time and re-seat them. Feel for one click on the plug end and you should hear two clicks on the coil end. I would do that and go from there - unless it has been quite a while since plug/plug wires have been replaced. Plugs and wires have never been replaced but I only have 25,000 miles on the truck. Of course most of my driving is city driving so maybe it's time for new ones already. Quote Link to comment Share on other sites More sharing options...
Bonj87 Posted May 30, 2007 Report Share Posted May 30, 2007 I guess they definitely were your problem then....must've been cool at night? i went thru 4 sets of wires, including a new set of MSD wires from Frank. none of them solved my problem. we removed the metal boots, and problem went away if you get a p0307, thats specific to cylinder 7.. probably an injector. Quote Link to comment Share on other sites More sharing options...
zac2005ss Posted May 30, 2007 Report Share Posted May 30, 2007 Thanks Guys for all the info. WIll try and see what happens Quote Link to comment Share on other sites More sharing options...
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