weasel_boy Posted May 4, 2015 Share Posted May 4, 2015 Just decided to take my otherwise great running 02 to my dealer for an oil change, and since it has 65,000 miles on it decided to spring for a new air filter and spark plugs. Took it for a long ride yesterday and it is way down on power, and the gas mileage has dropped from the mid 40's to a little over 30. Hopefully this is as simple as the wrong plugs or not gapped right. Will be taking it back to them tomorrow, any other ideas as to why it's all of a sudden running poorly? Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted May 4, 2015 Member Contributer Share Posted May 4, 2015 Wrong plugs or bad new plugs. Link to comment Share on other sites More sharing options...
KanadianKen Posted May 4, 2015 Share Posted May 4, 2015 plug wire not attached firmly? Link to comment Share on other sites More sharing options...
spud786 Posted May 4, 2015 Share Posted May 4, 2015 If they touched a gap on an irid, its permanently damaged. the ground electrode is platinum coated, its trashed if you put a tool on it. Id say most mc mechanics would know better Link to comment Share on other sites More sharing options...
Member Contributer Duc2V4 Posted May 4, 2015 Member Contributer Share Posted May 4, 2015 Could be a vaccum line got disconnected and not reconnected... Link to comment Share on other sites More sharing options...
Member Contributer Rush2112 Posted May 5, 2015 Member Contributer Share Posted May 5, 2015 plug wire not attached firmly? ... or they pulled the crimp connector off with the old plug. Could be a vacuum line got disconnected and not reconnected... +1... another possibility Link to comment Share on other sites More sharing options...
Member Contributer MadScientist Posted May 5, 2015 Member Contributer Share Posted May 5, 2015 If they touched a gap on an irid, its permanently damaged. the ground electrode is platinum coated, its trashed if you put a tool on it. Id say most mc mechanics would know better No, please don't spread misinformation. Directly from a tech request to NGK The coating is not the issue when checking the gap but rather the iridium being such a hard material it is brittle and snap off if gapped improperly. When gapping you do not want to apply any pressure or prying force to the fine wire center electrode or insulator or it can be broken and is not warranted. You want to adjust the plug only from the ground electrode. Sliding a tool across the iridium electrode will not damage it though as long as excess pressure is not applied. I am also including a photo of the proper way to gap the plugs. Thanks. Best regards, Brandon Peeler Technical Support Representative I have encountered and successfully gapped many iridium spark plugs, you must just be careful not to break or weaken the electrode. That's not saying that some fool tech didn't snap an electrode off and install it anyway... Link to comment Share on other sites More sharing options...
spud786 Posted May 5, 2015 Share Posted May 5, 2015 The iridium is on the center electrode of the vfr irds, the ground electrode is coated in platinum. They are pregapped, if they need to be gapped replace, doesn't matter whether you believe you can regap successfully. That platinum coating is like butter, and easily damaged. If you want to play the gap game, fine. But Ive ran the irids as high as 56,000 miles on the vfr, with out touching the gap, to where the platinum coating was gone and so was most of the ground electrode, bike still ran flawless. there 's little point in even touching the gap unless its obviously bent or something, and you'll likely just f it up.. Ive done about 4 sets of irids in my vfr , I do carefully check the gap, and even that can damage the coating. Link to comment Share on other sites More sharing options...
weasel_boy Posted May 11, 2015 Author Share Posted May 11, 2015 Original poster here. Coil wire was loose, bike now runs like brand new. Much to my relief Link to comment Share on other sites More sharing options...
Member Contributer Switchblade Posted May 11, 2015 Member Contributer Share Posted May 11, 2015 Link to comment Share on other sites More sharing options...
spud786 Posted May 11, 2015 Share Posted May 11, 2015 Did they break something, how is a coil wire loose, as I recall its a snapin fit, no way to come loose unless tab is broke, None the less they fk'd it up and they had 4 chances with 4 different direct fire coils, to do so. Seems they were only successful at causing one to fail. Original poster here. Coil wire was loose, bike now runs like brand new. Much to my relief Link to comment Share on other sites More sharing options...
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