I have no spark on my quad. It has been working fine, then it would stop every once in a while and not start, no spark.
Now it won't start at all...again no spark.
I tried a number of things.
Removed the blk/white wire from the cdi to see if it was the kill switch no difference.
I looked over all the conections and they look fine.
I replaced the plug, cable, CDI and coil from my other Giovanni 200...still no spark.
What else can I do?
I untaped and unstrapped most of the wires to get a better look at them...they all seem fine.
Quad turnsover good,just no spark.
What else can it be?
Any help you can give would be appreciated.

 

Do you know if your CDI is DC powered or AC powered? Most are AC powered, but some newer ATV's are starting to be DC powered. When I say "newer" I'm talking about cninese ATVs in general and not Giovanni. I don't know what Giovanni does on their quads.

I think this is your CDI, right?


Disconnect the CDI from the wiring harness and measure the following on the wiring harness pins:

If you CDI is DC powered then the pin labeled "AC Ignition Power" should have 12 volts DC on it when the ignition is turned on.

If it is AC powered then there will be zero volts when the ignition is on and the engine is not turning. When cranking the starter motor there should be about 80 volts AC on this pin to engine ground. You *must* measure this voltage while the CDI is unplugged or the results you get are meaningless. This voltage comes from a high voltage winding on the stator, and is used to power the CDI.

Also measure the "Ignition Trigger" voltage on the wiring harness to engine ground while cranking the starter motor. Whether the CDI is AC or DC powered you should read 0.1 to 0.5 volts AC. This signal comes from a pickup coil in the stator outside the flywheel. It is used to trigger the CDI into firing the spark plug.

Next reconnect the CDI measure both the DC voltage and and AC voltage on the Kill Switch pin. What are they? Do both since the voltage here is complicated and has both DC and AC components. Once again there is high voltage here so be careful. This voltage comes out from the internal circuitry inside the CDI, and sometimes gives clues as to what is happening in the CDI.

 

LynnEdwards, thank you for your time and help.
Yes this pic looks excatly like my CDI.
CDI is AC powered.

Tested with CDI disconnected:
AC Ignition Power (Black wire, Red line) is 0 Volts when ignition is turned on and 56 VAC when cranking.
Ignition Trigger (Blu wire,White line) .7VAC when cranking.

Plugged in the CDI:
Pulled the Kill Wire and measured the CDI Kill switch pin.
Ignition On: 1.7VAC and 1.0VDC
Cranking: 57VAC and 26VDC.

I hope this helps in isolating the trouble a bit more.
Please let me know next steps.
Thanks again

 

Stuill having the same probllem. Can anyone help?

 

GioDon,

I screwed up. Somehow I missed this post. I'm sorry that I gave you advice and then left you hanging all this time.

Your AC Ignition Power voltage is lower than I've seen, though I think 56 volts AC is more than enough to generate spark. The voltage here is directly proportional to cranking speed, so this morning I slowed my starter down till my AC power voltage was 55 VAC to match yours. [I did this by adding 24 feet of 12 gauge wire in series with the battery.] My quad started righ up no problem (my quad uses the same CDI as yours).

The ignition trigger pulse voltage is fine.

The kill switch voltages with the engine stopped aren't right. This voltage on the kill switch pin on the CDI should be zero (both AC and DC). There is no voltage source to the CDI - the CDI is powered completely by the stator winding, so if the engine is stopped there should be no voltage there. Turning the ignition switch on and off should not affect this voltage either.

What worries me is that if you measure AC and DC voltages when there shouldn't be any, then did you really measure 0.7 VAC on the ignition trigger pin or was this an erroneous voltage too? I would verify the kill switch voltages again.

57 VAC and 26 VDC on the kill pin while cranking matches my quad exactly. I think this vindicates the stator and the front end of the CDI.

Next step:

Disconnect the CDI and measure the following (engine stopped):

1) Measure the resistance of the Ignition coil pin in the wiring harness to ground. It should be less than 1 ohm.

2) Disconnect the ignition coil primary (there should be a bullet connector somwhere near the ignition coil) and measure the resistance of the ignition coil pin to ground at the CDI connector again. This is the same measurement as in #1 above, but now it should read infinite ohms.

3) Measure the resistance of the AC ignition power pin to ground at the CDI connector (should be 400 ohms or so).

4) Measure the resistance of the Timing trigger pin to ground at the CDI connector (should be 140 ohms or so).

5) Verify that the ground wire (or wires) at the CDI connector are connected to ground.

One final measurement: With the CDI disconnected and while cranking the engine: Measure the AC current to ground on the Ignition power pin of the CDI connector. You'll have to set your meter to AC amps on the 200 mA scale, and move your red probe to the milliamp current jack. You should measure 100-150 milliamps (0.10 to 0.15 amps). What you will be measuring is the current limit point of the ignition power winding of the stator.

Some of the above tests are just different ways of measuring the same things as yoiu have already. Lets see if they agree with earlier measurements. Since you've changed everything except the stator and the wiring, and the stator is measuring OK, we're down to wiring or mismeasurement.

 

I am thinking maybee a kill switch or ignition prob. My jet 200 does this some times. after I hose it down after a muddy ride it will start up then just die . cranks all day but no spark. after it dries a bit runs like a champ again. I have learned to not hose down the kill switch or ignition and solved the prob. take the ignition apart and look for corrossion or bad connections. I think if it was the kill switch the starter wouldn't even turn over. so I would start with the ignition switch first. I hope this helps. Seth 03

 

GioDon -
Did you get this resolve - please post result .
I'm running into a similar issue ..

thanks.

 

I have a gio 200 cc and whent through the same thing and I found a loose male/female plug ( green wire) beside the gas tank under the plastic that was not plug in all the way this could help you and the other thing I found was one of the wires in the plug on the cdi was not making contact I had to go and check all my plugs and foundalot of them were loose hope this helps

 

Thanks for the reply/insight .. I'll double check the wires and post results.

 

Sorry to up this thread but I found this topic on google. I have the same problem. I don't get any power from the black and yellow wire that come out the cdi. I have two thing different, first I have a perfomance cdi. and the other thing I broke my kill switch. But I believe that its not my problem, because my atv was working with my old cdi and this problem.

I also found a green wire, but it come from the control ( where the light control are) but this wire has continious power when the key is on .

I checked the power on each wire of the cdi, all got power, but there is any power on the green one