2000 Workhorse st350

1thurston · 10-20-2019, 08:37 PM

I have a spark issue. The short plug wire off the coil is not firing, I replaced the coil and have the same problem. If I remove the long plug wire and place on either plug it will run that cylinder. The short plug wire stays dead.
Is it the exciter?
It has #150 compression each side, checked all wires, cleaned up all ground wires. Valve clearance is good.
I was told by 2 EZ-Go mechanic's that its rare exciters go bad. Also said this is a first for them to have a coil do this.

CP241 · 10-20-2019, 08:55 PM

Maybe I'm either misreading what you've written or under thinking it, but it sounds to me like if it's the same with either coil, and the long wire makes either cylinder run, the short plug wire is bad.

Should be easy enough to check resistance through the wire with a meter to verify

1thurston · 10-20-2019, 09:47 PM

How is that done forsure? I put a volt meter on each one while turning over the motor and got 11.5 volts on long wire and 5.5 on the short. Not sure what I'm looking for by doing this.
Thanks

CP241 · 10-20-2019, 11:04 PM

Remove each plug wire from the coil, and remove the cap from each wire. I dont have the specs off hand but I would expect them to measure between 5k-8k ohms each wire.

1thurston · 10-21-2019, 02:44 PM

Thanks, I will check them tonight

Goob · 10-24-2019, 07:06 PM

I have one doing the exact same thing hopefully someone out there knows the answer!

1thurston · 10-24-2019, 09:17 PM

I ordered a igniter and will try that. I did ohm the old coil it measures 3.4 acceptable for that coil is 3.7 - 5.2 ohms. I have not checked the new coil yet.

Goob · 10-24-2019, 09:36 PM

I have tried 5 coils,2 pulse pickup and 3 ignitors and still have the same problem you are having!

1thurston · 10-27-2019, 07:04 PM

Well the igniter did not change anything, it did not spark on either coil with the new igniter

CP241 · 10-28-2019, 07:25 AM

again, have you replaced the spark plug wires? If you have a bad wire or spark plug cap, you can replace as many coils as you want and it's not going to make a difference.

Your spark plug wires are 20 years old now...

10-20-2019, 08:37 PM	#1
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21	2000 Workhorse st350 I have a spark issue. The short plug wire off the coil is not firing, I replaced the coil and have the same problem. If I remove the long plug wire and place on either plug it will run that cylinder. The short plug wire stays dead. Is it the exciter? It has #150 compression each side, checked all wires, cleaned up all ground wires. Valve clearance is good. I was told by 2 EZ-Go mechanic's that its rare exciters go bad. Also said this is a first for them to have a coil do this.
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21

10-20-2019, 08:55 PM	#2
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: 2000 Workhorse st350 Maybe I'm either misreading what you've written or under thinking it, but it sounds to me like if it's the same with either coil, and the long wire makes either cylinder run, the short plug wire is bad. Should be easy enough to check resistance through the wire with a meter to verify

10-20-2019, 09:47 PM	#3
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21	Re: 2000 Workhorse st350 How is that done forsure? I put a volt meter on each one while turning over the motor and got 11.5 volts on long wire and 5.5 on the short. Not sure what I'm looking for by doing this. Thanks
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21

10-20-2019, 11:04 PM	#4
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: 2000 Workhorse st350 Remove each plug wire from the coil, and remove the cap from each wire. I dont have the specs off hand but I would expect them to measure between 5k-8k ohms each wire.

10-21-2019, 02:44 PM	#5
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21	Re: 2000 Workhorse st350 Thanks, I will check them tonight
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21

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10-24-2019, 07:06 PM	#6
Goob Not Yet Wild Join Date: Oct 2019 Posts: 12	Re: 2000 Workhorse st350 I have one doing the exact same thing hopefully someone out there knows the answer!
Goob Not Yet Wild Join Date: Oct 2019 Posts: 12

10-24-2019, 09:17 PM	#7
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21	Re: 2000 Workhorse st350 I ordered a igniter and will try that. I did ohm the old coil it measures 3.4 acceptable for that coil is 3.7 - 5.2 ohms. I have not checked the new coil yet.
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21

10-24-2019, 09:36 PM	#8
Goob Not Yet Wild Join Date: Oct 2019 Posts: 12	Re: 2000 Workhorse st350 I have tried 5 coils,2 pulse pickup and 3 ignitors and still have the same problem you are having!
Goob Not Yet Wild Join Date: Oct 2019 Posts: 12

10-27-2019, 07:04 PM	#9
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21	Re: 2000 Workhorse st350 Well the igniter did not change anything, it did not spark on either coil with the new igniter
1thurston Not Yet Wild Join Date: Oct 2019 Posts: 21

10-28-2019, 07:25 AM	#10
CP241 Nincompoop village idiot Join Date: Apr 2018 Location: Michigan Posts: 9,673	Re: 2000 Workhorse st350 again, have you replaced the spark plug wires? If you have a bad wire or spark plug cap, you can replace as many coils as you want and it's not going to make a difference. Your spark plug wires are 20 years old now...

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