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exhaust popping at WOT

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Old 02-15-2013, 05:32 PM
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Uuum I thought you couldn't gap iridium plugs? They are gapped at whatever nrg' s come with out of the box. Yes the plugs are torqued properly. How would spark plug torque do this? And there are 97,000 miles on MY03
Old 02-15-2013, 05:38 PM
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I would check the gap. With my gsr plugs, sometimes one wouldn't be in spec
Old 02-15-2013, 07:54 PM
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There is always the chance of a plug getting dropped,etc. Iridiums were never oem equipment please explain to me how they would be gapped properly? How would spark plug torque do this? not enough torque will not seal properly creating a lean condition. double check your work and dont assume anything
Old 02-17-2013, 05:45 AM
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Originally Posted by starchland
There is always the chance of a plug getting dropped,etc. Iridiums were never oem equipment please explain to me how they would be gapped properly? How would spark plug torque do this? not enough torque will not seal properly creating a lean condition. double check your work and dont assume anything
Alright thanks everyone!!!! It was infact the spark plug gap. 3 plugs were gapped to .044 but one of them was at .053. I gapped them all to .041 and torqued them to 18 ft. Lbs. Thats all correct, right guys? Car seems to idle smoother and get up and going faster. Thanks guys.

On a side note. Dont buy a torque wrench from harbor freight, i noticed that it was going too tight and still didn't click so i stopped tightening the plug. And put the extension in a c-clamp and pulled on the torque wrench as hard as i could and it never clicked. That was almost a disaster. Just glad i noticed something was up. Thanks again guys
Old 02-17-2013, 06:11 AM
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You better up your spark plug torque to 24ft-lbs, or they are going to back out.

Trust me on this one

Was your torque wrench 1/2 drive? If so, the torque wrench is not the problem.

NO torque wrench should be used in its low range settings.

If the torque range starts at 20 ft pounds, you cannot click it down 2 and use it to put a spark plug to 18 ft pounds.
Old 02-17-2013, 11:48 AM
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Glad it worked out for you. So your plugs were just eye ball torqued before?
Old 02-17-2013, 03:27 PM
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Originally Posted by Billman250
You better up your spark plug torque to 24ft-lbs, or they are going to back out.

Trust me on this one

Was your torque wrench 1/2 drive? If so, the torque wrench is not the problem.

NO torque wrench should be used in its low range settings.

If the torque range starts at 20 ft pounds, you cannot click it down 2 and use it to put a spark plug to 18 ft pounds.
Hmmm it was actually a post by you that made me torque them to 18ft. Lbs. Not sure how old the thread was, but after trying to search for it i found a thread from last year that you stated torque them to 21ft.lbs.? Why 24ft.lbs. Now? Not questioning you, because i know your the go to guy with this stuff, just curious. And the torque wrench was just one from wal mart i bought because it was 2am while i was working on my car. But it adjusts from 15ft.lbs. Up



And no they were not eyeball torqued last time, they were torqued to 18-19ft.lbs. Last time.
Old 02-17-2013, 04:06 PM
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Ive had a plug loosen up on me at 18lb before. I upped to 20lb and have never had the issue again, and its been years. It is an aluminum head which is easy to over trq and strip, so I always get weary upping the trq too much. I'd say anywhere between 20-24 is fine, but I wouldn't go any higher. Shouldn't need to.
Old 02-18-2013, 12:18 AM
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Alright guys upped the torque to 24ft.lbs. Hope it works out. Thanks billman for chiming in.
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