Custom/Hybrid Spark and fuel=No start

[N3vrSat1sfied]

So I took ground cable off the ski, checked resistance it showed 1ohm, put it back in and lost spark all together. At the time I didn't put two and two together. So I continued troubleshooting found the ebox to have a little bit of water in it. So I checked resistance on stator and coil, both good! So ill let it dry out and try a brand new ground cable and see what happens.

 

[N3vrSat1sfied]

I'd try pulling the carbs, clean/ check them, check the pulse line, try new fuel. Make sure you check the battery cables at the ebox too. I had that happen this year, I tried everything turned out to be a weak connection (semi broken cable). I hope you can find the gremlin, sorry to hear about the set back.

It's not carbs or it would atleast try to start with primer or fuel directy in cylinder.

Might be the moisture in the ebox though

 

[623pwr]

You may have water in them, wouldn't hurt to check at this point, in my opinion. Usually it will fire up though, unless your fuel pump isn't working due to water intrusion or other reasons. Just take your time and pull up the mikuni tuning manual for a reference.

 

[N3vrSat1sfied]

You may have water in them, wouldn't hurt to check at this point, in my opinion. Usually it will fire up though, unless your fuel pump isn't working due to water intrusion or other reasons. Just take your time and pull up the mikuni tuning manual for a reference.

I hear what your saying but since now I lost spark I'm 99% the problem has been electrical the whole time. Plus I am running dual 44's both with their own pickups.

 

[623pwr]

That's probably the prob then. I feel your pain, try to go through every connection one more time. Maybe check the coil/ cdi if you have a spare

 

[air blair]

Fuse line went bad on me a few times. Bad unseen connections


Sent from my SPH-D710 using Tapatalk

 

[N3vrSat1sfied]

Good point jeff, Wouldn't the fuse line cut power to relay, or is it flowing in the other direction? I don't remember off the top of my head.

 

[Freakrider]

As I recall it won't crank when the fuse is blown or removed.

 

[CRJ]

have you swapped batteries yet? the cdi wont spark properly under a certain voltage, but the motor will crank. have you checked the exhaust system? most engines wont run if something is loose and letting air out/in. check the reeds, but putting a paper towel over the carb while cranking. (hold onto it with a buddy or a rubber band) you should only see it being sucked down. if its not, blown reeds are for sure. did you check the seals? ive seen crank seals come out and the ski wont start.

keep posted!

 

[N3vrSat1sfied]

Yes crj I checked reeds and seals, but my problem is electrical.

freakrider I believe u are correct a blown fuse won't allow it to crank.

 

[N3vrSat1sfied]

At this point: with the water in the ebox it is very possible something was grounding out in there. So I will double check all wires. Like I said Coil and Stator both are withen specs for resistance. Ill leave the box open until I get the ski back running.

I am going to replace that ground cable for sure, It probably has a soft spot and is no good.

Once I get the new ground, Ill try to fire it up, if not then Ill swap out a cdi.

 

[RivMan]

Are your plugs getting wet? This much messing around dumping fuel into the cylinders, you're probably going to have an issue with excess fuel. I'd get those spark plugs cherry red, and toss them back in before you mess with trying to get it started again. Might be all it needs.

-Rob

 

[N3vrSat1sfied]

Are your plugs getting wet? This much messing around dumping fuel into the cylinders, you're probably going to have an issue with excess fuel. I'd get those spark plugs cherry red, and toss them back in before you mess with trying to get it started again. Might be all it needs.

-Rob

ya they are getting wet, I left them out over night with a rag over the cylinder. Ill throw a new set in when I get the ground cable. Also I have fuel shut off valves, So when I am just checking for spark I dont have the fuel on.

 

[JT_Freeride]

I had the exact same thing happen to me not to long ago. I tried everything in the book. I had spark I had fuel and I had comp. turns out the spark in the front cylinder would break up after about 10-15 seconds of cranking my guess is that under compression it couldn't spark. This was with a new set of plugs. How I found out the problem was when I was cranking the boot would make a clicking noise and not properly ground out the plug. So I pulled the boot cut the wire back a little and same thing. So for the hell of it I tried another brand new plug and boom it was fixed. Not sure if I had 2 bad plugs or some corrosion was in the plug boot. Sometimes it's the simplest things.

 

[N3vrSat1sfied]

I had the exact same thing happen to me not to long ago. I tried everything in the book. I had spark I had fuel and I had comp. turns out the spark in the front cylinder would break up after about 10-15 seconds of cranking my guess is that under compression it couldn't spark. This was with a new set of plugs. How I found out the problem was when I was cranking the boot would make a clicking noise and not properly ground out the plug. So I pulled the boot cut the wire back a little and same thing. So for the hell of it I tried another brand new plug and boom it was fixed. Not sure if I had 2 bad plugs or some corrosion was in the plug boot. Sometimes it's the simplest things.

Thanks, I have another coil I can swap out for troubleshooting, Just waiting for the new ground before doing anything (hopefully tonight). But hopefully the problem is either the bad ground and/or water in the ebox.

 

[woodsrider845]

If you grounded it with an external cable and it didn't fire, why would a new cable make it work? I got you, if you tried by yourself and aren't 100% sure about connections, but??? Look into a spark tester. It allows you to test spark with plugs in, with compression, under load. If you don't want to buy one, you can make one. Keep us informed. Hope you get braaaap with the new cable.

 

[N3vrSat1sfied]

I got you, if you tried by yourself and aren't 100% sure about connections

Exactly, make shift temp ground, is not trustworthy. And since I took the old cable off and put it back on and lost spark all together, plus I have got good and bad readings off of it, So I am sure there is a soft spot that is allowing intermittent grounding. Hopefully thats all it is :fingersx:

I got a new cable, so Ill be in the garage tonight after work. Ill post my findings then.

 

[N3vrSat1sfied]

Figured it out: ground didnt fix it so I started swapping components. I put a stock cdi in and I had spark, threaded the plugs in and with the first hit of the button she fired up.

Official diagnosis (pending test ride): MSD enhancer failed

 

[Scraggly]

Figured it out: ground didnt fix it so I started swapping components. I put a stock cdi in and I had spark, threaded the plugs in and with the first hit of the button she fired up.

Official diagnosis (pending test ride): MSD enhancer failed

The msd might not have failed weak stator output will make then seem like they did and will run in a stock Cdi. Usually when one really fails you get nothing. And didn't you day it would spark just not run under compression?

 

[N3vrSat1sfied]

It's super old, and stator passed all resistance checks and yes the other day I had spark but not under compression and since yesterday no spark.