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Joined: Aug 31, 2015 21:22:38 GMT -5
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Post by campbmic on Aug 31, 2015 21:48:06 GMT -5
So my friend has a 2011 Biella Peace 150cc scooter looks like a gy6 engine. She dropped it a couple of days ago on the left side and since then it hasn't been able to start. It's turning over and everything but there is no spark (took the sparkplug out and tried to ground it on the case). I'm trying to impress her by fixing it but have gotten stuck! Somebody help me out!
When I disconnect the power and ground wire that lead from the CDI to the coil the power wire tests good (60vAC). Then when I connect the coil back up and test the same wire it tests bad a really small number like 0.1vAC. Then I tested the coil and it has 0.8ohms (good) and even bought a new coil and still nothing.
I followed this troubleshooting guide and here are my results:http://www.buggydepot.com/tech-center/gy6-150cc-ignition-troubleshooting-guide-no-spark/
1. Bypass switches (GOOD): Tried it, still nothing
2. Stator (GOOD): Checked the two power wires going from the stator to the CDI and both are good. Black/Red (CDI Power) = 80vAC Blue/Yellow (Trigger Wire) = 1.5vAC
3. CDI(BAD?): Next I checked the two wires going from the CDI to the coil THIS IS WHERE IT GETS WEIRD
There are two wires that go from the CDI to the coil Black/Red (power) and Green (ground). When I disconnect the power and ground wires from the coil and test them with the multimeter the power wire reads 60vAC and goes down as we continue to turn over the engine. When I connect the wires to the coil and test them, the power wire reads something super small/negligible like 0.1vAC
4. Ignition Coil (GOOD): 0.8 ohms
What the funk is going on here?!
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Post by lain on Aug 31, 2015 22:21:59 GMT -5
CDI... Capacitor Discharge Ignition... Capacitors hold charge until dischraged or they slowly leak power after the power source is gone. That's what's going on. You are not testing it right. You would need a fancy expensive multimeter with capacitor function, any other test is pointless. Some people say to check the CDI by doing an OHMZ test, but that only helps you figure out if power can get from one connector to another pretty much, and if you cannot charge the capacitors with the meter then it would not read accurately anyways...
Most likely it sounds like a bad coil or spark plug or maybe just a loose spark plug boot or wire.
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Post by ricardoguitars on Aug 31, 2015 23:15:23 GMT -5
I second on the loose spark plug boot, that's a very common issue; a bad CDI connector is also common.
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Post by lain on Sept 1, 2015 8:11:49 GMT -5
I second on the loose spark plug boot, that's a very common issue; a bad CDI connector is also common. He said he has power on the wire going from the cdi to the coil. The only things left after the CDI sends power is the coil/wire/boot and plug. Gotta be one of those.
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Post by steve on Sept 1, 2015 8:24:22 GMT -5
Did you check the ground wire from the battery to the valve cover? That could have been knocked off. If not, it's got to be the boot. Get one of the metal boots. You know it's grounding with those.
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