Nighty Posted November 27, 2003 Report Share Posted November 27, 2003 I recently had some ignition problems, while trying to solve the problem, I switched the spark plug caps. But my shee just fired up again and drove like nothing changed. I tried to figure this out but i am stuck. What im thinking: In the normal positions the left sparkcap will fire when the cilinder is almost up. at that point the right cilinder is almost down so the right sparkcap is ofcourse NOT firing. Now i turn the spark caps around so left becomes right and right becomes left. Simply meaning the left cilinder is completly up and should receive a spark but that spark now goes to the right cilinder which is completely down! simply said... it cant start,run or ride. But it does! Any explanations? Just curious. Quote Link to comment Share on other sites More sharing options...
. Posted November 27, 2003 Report Share Posted November 27, 2003 I dont know if this is right or not, but I believe it fires twice. Once when its up, and once when its down. Pull both caps off and put plugs in them and hold them to a ground and kick it over, see if they both fire at the same time. I believe they do but not sure. Quote Link to comment Share on other sites More sharing options...
holeshotkid Posted November 27, 2003 Report Share Posted November 27, 2003 Actually, both plugs fire at the same time and every 180 degrees. There is no right or left plug wire. Hope this helps. Quote Link to comment Share on other sites More sharing options...
boonman Posted November 27, 2003 Report Share Posted November 27, 2003 Indeed. Both [lugs fire 180 degrees apart. Meaning you get a plug firing on one cylinder when it is around TDC, and the other cylinder is at BDC. And vice versa. It is simpler that way from an electronics standpoint... Quote Link to comment Share on other sites More sharing options...
Nighty Posted November 27, 2003 Author Report Share Posted November 27, 2003 Thanks guys, I'm gonna try holeshotkid's idea. firing at the same time hmm now thats a possibility. Quote Link to comment Share on other sites More sharing options...
boonman Posted November 27, 2003 Report Share Posted November 27, 2003 There is no trying idea about it. That's just the way it is.... Quote Link to comment Share on other sites More sharing options...
Screamin_Banshee Posted November 28, 2003 Report Share Posted November 28, 2003 There is no trying idea about it. That's just the way it is.... YUP YUP..thats the way it is... What exactly is your shee doin? Maybe we can help figure out the problem Quote Link to comment Share on other sites More sharing options...
Nighty Posted November 28, 2003 Author Report Share Posted November 28, 2003 The banshee is fine again. but holeshotkid said. Actually, both plugs fire at the same time and every 180 degrees. There is no right or left plug wire. Hope this helps. And thats what i am going to try out. I'm just wondering WHY the spark plug caps can be switched. In boonmans theory: switching the caps would make the banshee misfire and thus it wont start. Quote Link to comment Share on other sites More sharing options...
holeshotkid Posted November 28, 2003 Report Share Posted November 28, 2003 Just to clear this up for you, Boonman is stating the same thing I did. Each of the cylinders on your shee fires every revolution and 180 degrees from each other. The coil fires both spark plugs at the same time and every 180 degrees also, thus making no difference which plug wire goes to which plug because the wires are tied together inside the coil. Let me try to put it another way and keeping in mind that both plugs fire at the same time and every 180 degrees. Lets also state for argument's sake that the timing is fixed at 10 degrees before top dead center (TOC) meaning that the plug will fire 10 degrees before the piston reaches the top of the stroke. Keep in mind again that your pistons are 180 degrees off from each other, meaning that when the left piston is at TOC, the right piston is at bottom dead center (BOC) or at the bottom of the stroke. OK, having all that in mind, when the engine is running and one of the pistons is on the way up, the plug for that cylinder will fire 10 degrees before TOC. At the same time, the piston in the other cylinder is on the way down and reaches 10 degrees BOC and that corresponding plug just fired too. Fireing a the plug on the downstroke is completely useless but it was done this way, like Boonman was stating, simply because it was the easy way to get the job done. I hope this cleared it up for you. There is no theory to it, it is the way it is. Quote Link to comment Share on other sites More sharing options...
boonman Posted November 28, 2003 Report Share Posted November 28, 2003 I was trying to give a small explanation of why the plugs fired at the same time, and that it didn't matter. But your explanation kicks ass over mine!!!!!!!! Quote Link to comment Share on other sites More sharing options...
holeshotkid Posted November 28, 2003 Report Share Posted November 28, 2003 Thanks, I could tell the short version wasn't quite going to cut it this time. You had a great breif explanation but one would have had to know how it kind of worked in the first place. I have two teenage boys that love to help me in the shop so I rarely get to explain how something works using the short version.... Quote Link to comment Share on other sites More sharing options...
BansheeBrian Posted November 28, 2003 Report Share Posted November 28, 2003 Hey Holeshot kid! That was brilliant! I will read it over before i leave this post.Ol'boony didnt stand a chance on this one!j/k. I didnt know that at all. One is firing on the way up and the other is firing on the way down but at the same 10 degrees. always wondered. Quote Link to comment Share on other sites More sharing options...
Nighty Posted November 29, 2003 Author Report Share Posted November 29, 2003 Indeed Holeshotkid a briljant explanation! Sorry for the little misunderstanding Boonman. Well now we got this sorted i say: BEERTIME! And again: thanks for clearing this up. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.