Popping noise...goes away when #7 coil is unplugged
12-28-2006, 01:00 PM
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Popping noise...goes away when #7 coil is unplugged Guys,
I have an intermitant popping sound on the driver side bank of cylinders. Zero'd in on the #7 cylinder. When I unplug the #7 coil harness connector...the sound goes away. So I thought the coil was bad(misfiring) , and replaced ...but sound came back. I replaced the plug wire too...still there.... Could this be a gasket leak around the #7 cylinder?....Any other ideas from anyone else?.....
Stroker2112
I have an intermitant popping sound on the driver side bank of cylinders. Zero'd in on the #7 cylinder. When I unplug the #7 coil harness connector...the sound goes away. So I thought the coil was bad(misfiring) , and replaced ...but sound came back. I replaced the plug wire too...still there.... Could this be a gasket leak around the #7 cylinder?....Any other ideas from anyone else?.....
Stroker2112
12-28-2006, 01:53 PM
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if by any chance your running pacesetter headers i would check for a hole in the primary.i had the same deal,a popping or ticking noise narrowed down to 1 cylinder.after weeks of trying to find the cause i found a hole the size of an eraser.probably not your problem,just a thought
12-28-2006, 02:57 PM
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amazing....yes they are pacesetters....I'll check for holes tonight (thanks)...would JB weld work to fill a hole if it exist?..... Also, the gap on my plugs (NGK TR55s) are .060...
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12-28-2006, 03:06 PM
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I'm not sure about the JB weld. A friend of mine used it on his exhaust recently, but he used it behind the cat which is obviously not as hot. I'd be inclined to think it would work at least short-term. JB weld has supposedly been used to repair engine blocks, so I'd expect a lot out of it.
12-28-2006, 05:19 PM
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I had the same problem on my new motor. After about 10 hours of run time the header bolts loosened up just enough to make for a small leak on that cylinder. It only made that pop when the coil pack was pluged in. Use a 5/8 or so heater hose. Stick one end down by the primary mating surface to the head and the other end to your ear. For me, it was plan as day when comparing to other cylinders. 
12-28-2006, 06:07 PM
#10
Originally Posted by Gauge
I'm not sure about the JB weld. A friend of mine used it on his exhaust recently, but he used it behind the cat which is obviously not as hot. I'd be inclined to think it would work at least short-term. JB weld has supposedly been used to repair engine blocks, so I'd expect a lot out of it.
take it off and have it properly welded
12-28-2006, 10:34 PM
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Originally Posted by LugNutLS1
I had the same problem on my new motor. After about 10 hours of run time the header bolts loosened up just enough to make for a small leak on that cylinder. It only made that pop when the coil pack was pluged in. Use a 5/8 or so heater hose. Stick one end down by the primary mating surface to the head and the other end to your ear. For me, it was plan as day when comparing to other cylinders.
Not sure what type of cam your running in your car but .060 gap on the plugs seems a little excessive.
good luck 