Best DIY way to check spark plug wires fast! No tools needed #misfire #sparkplug #diymechanic

And what we're gonna do… okay I got great spark but I'm gonna I'm gonna go the other side of the bike… because this is a real test I mean this is a real customer's bike And what I'm gonna Hey friend. Smash that subscribe button It really helps us out. Also we have hundreds of videos and playlists on here for you And then we started adding We even start adding captions so you can pick your language Enjoy the video. Hey friends Shane from How2Wrench.com. And I'm getting to another step… in my progress of working on this VFR Yes I turned the lights off on purpose It'll make sense in a second here. But when I get this far along…I am always hitting these stop points to check things that like if they're wrong I wanna fix them now. Right So I've done compression leaked down All that's good. Checking for leaks things like that. And before I put the carburetors on and fill up this whole cavity and before I put the radiator and make it really hard to get to these plugs, check out what I'm gonna do I'm gonna turn one more light off I'm gonna make it dark And what we are gonna do is we are gonna check for spark on all four cylinders. Before I turn this light off what the reason I do it in the dark, learn this years ago by accident…and working in a shop that didn't have a lot of light and we were doing a spark check and we could see the spark plug wires lighting up like fireworks. It was crazy. We're like dang what a neat diagnostic tool. So I'm gonna do that right now I'm hoping everything's gonna be fine but I'm gonna go ahead and kill this light K? And what we're gonna do is we're going to not only check spark like I said but we are gonna be looking there's let's see Where's my coil? Coils right here K… And what we're gonna do… okay I got great spark but I'm gonna I'm gonna go the other side of the bike… because this is a real test I mean this is a real customer's bike And what I'm gonna the bike… because this is a real test I mean this is a real customer's bike And what I'm gonna do is the ignition coil runs along the back side here… Ready … Can you see my spark… There's my spark. … yeah I'm following the coil wire back and I am not seeing any problems. Let me turn the lights back on and summarize here… Pretty cool idea huh? yeah… One second… Wow The things that we do to…buy a little bit of insurance That's what we're doing here. You know you could call this your state farm plan your farmers your favorite insurances…and you know do these intermittent checks. So if you want kind of a summary real quick if you haven't been watching the other videos, I'm always doing compression like before and after Right You know before Okay There's a problem Let's fix it Let's do it after. Make sure the problem went away. Leakdown Make sure there's no issues or anything going around after work that you've done. Do a cylinder leak down test. And coolant pressure test. I've got it out waiting right here. Once I put the radiator back on I'm gonna do a cooling system pressure test Before all this body work goes on before everything's buttoned up, these are great times to take advantage of this So like in the case of these ignition coils you could see they're buried back down in here If I got the gas tank and everything on here and then found out oh something's not right or something's not wrong well oh maybe go to spark problem. I'm doing a ton of reverse work. So I'm doing that spark check like I said right now on all of them. You could see in the front here Once I put that radiator on there that is a knuckle busting matter of fact in the manual they have you loosen the mounts and tip it forward to get a little access in there but man there's a knuckle buster to try and do that later on. The other thing that I'm doing there's something important here. And if people have skipped this part of the video they're missing out you're not because you're here. The other thing that I'm doing that is super super crucial… is I have all the spark plugs in Okay? I have all four plugs in This is a dummy plug or it's one of the old plugs So why is that important? Well what I'm doing is I'm checking all these ignition coils ability to fire under that that compression load if you will of the of the motor. Right If you have it with no plugs in it and it'll whirl to the moon really nice and easy, that means that the rotor that's spinning around there is gonna be it's gonna spin faster When things spin faster, they have more power Right They have you build a bigger electrical field so you're gonna have bigger brighter sparks So by me doing this under compression, what that does is it slows it down a little bit and and loads the system if you will. So like it would work you know in the real world Right Obviously I wanna check And see if I have a really good blue spark there under compression. Now if I wanna take that step further if you haven't seen our other videos I'd have to start digging up my diagnostic tools but we have testers where we can actually check the secondary output with everything attached so that we're also having that compression go against the spark plug. Let me explain that a little bit more while we're in this video. When you fire …a cylinder, that compression's coming up. That piston's coming up and what happens is that electrical has to jump that gap Okay So it's gotta jump from the center of that spark plug because that's where we're feeding it from the ECM. And it has to find its ground It has to be stronger than a jump across to this ground strap that's to the plug body and grounds to the motor That's what completes a path But if you never really thought about it you have like, seventy thousand pounds of combustion pressure pushing up against that. That ignition systems really gotta work hard to overcome… that cylinder pressure to jump across there So there's a lot of science there There's a lot of engineering that goes into all this. But my friends that is another little bit of insurance that you can buy yourself before you button it up so that you don't end up having to find things out the hard way. Coupler things talk about a little bit of safety here. This bike has a fuel pump and if you'll notice I have the fuel pump disconnected. So I have no fuel sources anywhere around. That's gonna get me any trouble and and cause problems right So the moment I get this done, intakes are gonna get covered back up so I can kinda keep working on things and not taking risk of things falling in there. There's a lot to be in a technician. If you're doing this yourself and you're thinking man the heck with this I'm gonna pay somebody. Now you know why you gotta pay them what you gotta pay them. There's a lot to know to do it right and there's a lot of things not to know to get into trouble. My friends I'm gonna get back at it I hope you appreciated this little bit deeper dive for you on…a really rad test I bet you haven't seen before because I haven't seen it I don't see anybody making this one I think it's really cool And I'll never forget that it was not my idea. It was a student's idea way back in the day. Ross was his name I don't know if it's Ross's idea as much as we all like discovered it together Right But I know it was Ross's motorcycles a little VT I think six hundred or VT seven fifty or the other And we were just like whoa whoa whoa whoa what look at that Look at that And we ceased you know just the spark plug wires shooting like fireworks. And…it got pretty scary for the student and maybe some other students in that class because they were thinking man if I was riding down the motorcycle and I had a crappy fuel line or I had a tiny little carb leak or I had a you know fuel injector anything, and it's dripping down on wires motorcycles are very compact right? Imagine the fire that would come from that. So if you're ever wondering how some of these motorcycles, you know you see them at rallies and different stuff where they're catching on fire that's one of the ways it can happen would be a bad plug wire. So way cool Right Alright Make sure like share subscribe smash those share buttons. Get this message out to the world If you haven't done so head over to our new YouTube channel Tools 2 Wrench. As always I'm gonna get back at it make it a great day and keep wrenching… Hey friends we are super excited to announce that the How 2 Wrench channel been approved for memberships. What's that mean for you? What would it look like if you could get member only content? Many of you been asking over the last year as we put out surveys and and tried to get some feedback that you missed the old deep dive long videos and the real explained content. feedback that you missed the old deep dive long videos and the real explained content. Those are very hard to produce and they're very costly. They take an immense amount of time especially to make it creative and interactive for you to get that deep understanding. We have a lot of schools institutions do it yourselfers. 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