Spark plug install...misfire!
10-25-2005, 07:32 PM
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Spark plug install...misfire! After installing the NGK TR55's, I get misfires when at idle, and when flooring it, there is major backfire popping noises....like fireworks...I immediately got off the gas. I've checked all the plugs and wires, they are all hooked up and snapped in twice.
I did leave two stockers on cyclinder's 6 and 8, because I had trouble getting them out. I will switch them soon, but that shouldn't be the problem, right?
Please help, thanks!
I did leave two stockers on cyclinder's 6 and 8, because I had trouble getting them out. I will switch them soon, but that shouldn't be the problem, right?
Please help, thanks!
10-25-2005, 07:41 PM
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Originally Posted by DarkHawkLS1
After installing the NGK TR55's, I get misfires when at idle, and when flooring it, there is major backfire popping noises....like fireworks...I immediately got off the gas. I've checked all the plugs and wires, they are all hooked up and snapped in twice.
I did leave two stockers on cyclinder's 6 and 8, because I had trouble getting them out. I will switch them soon, but that shouldn't be the problem, right?
Please help, thanks!
I did leave two stockers on cyclinder's 6 and 8, because I had trouble getting them out. I will switch them soon, but that shouldn't be the problem, right?
Please help, thanks!
10-25-2005, 07:45 PM
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Originally Posted by BrandonDrecksage
no way to know unless you take em out. I assume is didn't do this before? how do the wires look? are they gapped properly?
10-25-2005, 07:45 PM
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i would think that if everything was fine before the install, one of the plugs isnt firing then going on burning off the unburnt gas causing a pop....definately a bad plug or loose connection.
10-25-2005, 07:57 PM
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Originally Posted by DarkHawkLS1
No, it didnt do this before...the wires look good. I didnt know the plugs need to be gapped?
If there was any crud in the plug recesses in the head you may have got some crud in the plug gap while wallering around in there trying to hit the hole.(though usually not a problem)
You may have accidentally closed the gap on a plug while installing.(I've done it before on hard to reach plugs)
But worst of all, you didn't finish! you have two plugs left, LOL.
Seriously, though, I have a high mileage engine with no major oil leaks, but dirt and crud will find its way onto the heads. I try to rinse mine down at somepoint B/F plug install.
Worst case, r&r the plugs, inspect each one.
