Spark plugs, gap them please
10-10-2011, 03:12 PM
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Spark plugs, gap them please
Just a reminder to gap your spark plugs before you install them.. I purchased a set of NGK Platinum laser plugs about 5 months ago. The guy at advance auto told me they were a pre-gapped set and i shouldnt worry about it. So a few days ago i get 4 CEL's and my S is running like crap, drop in power, engine feels like its hopping on the road in first at low rpms, smelled like burning plastic. Got an obd reader and checked it out, had multiple misfires, cylinder 1, 3, 4, and the multiple misfire code p1399. Like anybody else im freaking out thinking the coil packs are about to blow, pulled all the plugs and noticed 3 of them were burned to a crisp. I was really concerned because the plugs are rated for 70,000 miles. All in All i picked up a set of NGK Laser Iridium for $36 bucks and gapped them myself, .044. So please do check your plugs before installation.
10-10-2011, 05:12 PM
#2
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I'd be interested to know what the post-crispy gap was. 
Just a word of advance to those reading...you should never put ANYTHING other than Iridium plugs in the S. jm2c.
Just a word of advance to those reading...you should never put ANYTHING other than Iridium plugs in the S. jm2c.
10-11-2011, 03:42 AM
#4
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if there is a -11 at the end of an NGK part number that means they should be pre gapped to 0.044.
if you get the same plug with out the -11, the gap will be between 0.030 and 0.035 usually.
if you get the same plug with out the -11, the gap will be between 0.030 and 0.035 usually.
10-11-2011, 07:48 AM
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10-11-2011, 09:09 AM
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idk dude...I've seen several users on the board having misfires until they upgraded to iridium (as demonstrated by the OP). I'm just saying...if you're going to put plugs in it, imho, they should be irdium.
side note: Torque them to 18 lbs, the old specs are no joy (@ 13lbs).
side note: Torque them to 18 lbs, the old specs are no joy (@ 13lbs).
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10-11-2011, 10:04 AM
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Op was talking about the gap, not the material. The biggest difference is going to be in how long the tips takes to erode and price. As long as the gap, heat range, and resistor type is the same, you should be good. I've heard people say that honda told them not to use iridium and people say that the tips break on the iridums but that's still what I use.
idk dude...I've seen several users on the board having misfires until they upgraded to iridium (as demonstrated by the OP). I'm just saying...if you're going to put plugs in it, imho, they should be irdium.
side note: Torque them to 18 lbs, the old specs are no joy (@ 13lbs).
side note: Torque them to 18 lbs, the old specs are no joy (@ 13lbs).
10-11-2011, 10:17 AM
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I'm just wondering if you got non resistor plugs. When I have my 3000gt they sold me some "oem" plugs and I had some similar issues as you. Turns out I had the wrong type resistor and ended up paying 600 to have them changed again! That car was a PITA to work on though.