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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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03-31-2019, 07:14 PM | #1 |
Gone Wild
Join Date: Nov 2015
Posts: 460
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G16 Intermittent spark
G16 has intermittent spark. Wouldn't start (spins but motor not firing up).
Checked for spark and had intermittent spark.. As I depress pedal I get one spark as pedal is just being depressed, then it goes away. If I 'pump' pedal, I can get several sparks as pedal is just starting to be depressed each time. I disconnected two wire plug going to engine and have continuous spark so I am assuming coil is good. I removed gas pedal switch and ohmed. At rest I am getting a reading of 3.2 When depressing 'button' I am getting open. I have another switch on an old parts cart and get the same results. I also removed ignition switch, jumped wires and same result. Intermittent spark unless I pump pedal.. Ideas? Thanks! |
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03-31-2019, 09:28 PM | #2 |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,669
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Re: G16 Intermittent spark
I'd try and swap the ignitor if you have a spare.
Easy enough to check the coil, cap, and pickup with a meter but only way to test ignitor is to swap with a known good unit |
03-31-2019, 09:51 PM | #3 | |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G16 Intermittent spark
Quote:
On a G16, the coil, pickup, and "ignitor" are all one unit at the flywheel, the only "input" it uses is a relay/circuit to "ground it out" when spark is not supposed to happen. Otherwise, if the crank is turning, it's making spark. |
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03-31-2019, 09:53 PM | #4 | |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G16 Intermittent spark
Quote:
Near the solenoid and voltage regulator, there is a third relay, it's the one responsible for shutting down the ignition system, try swapping that one from the parts mobile. |
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04-01-2019, 07:24 AM | #5 |
Gone Wild
Join Date: Nov 2015
Posts: 460
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Re: G16 Intermittent spark
Thanks! Will check this evening and report back!
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04-01-2019, 01:09 PM | #6 | |
Nincompoop village idiot
Join Date: Apr 2018
Location: Michigan
Posts: 9,669
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Re: G16 Intermittent spark
Quote:
I thought G16 was set up like my G9 with separate ignitor, coil, and pickup. When did Yamaha switch to an all-in-one ignition coil? |
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04-01-2019, 02:22 PM | #7 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: G16 Intermittent spark
1996 G16, until the FI drives all used the same TCI unit. FI uses traditional coil controlled by ECM.
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04-02-2019, 07:44 AM | #8 |
Gone Wild
Join Date: Nov 2015
Posts: 460
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Re: G16 Intermittent spark
Ok, it wasn't the engine stop relay but you lead me in the right direction...
Long story short, this cart belongs to a friend and he recently replaced the solenoid. (Should have looked at this area first).. When I removed the box to get to the engine stop relay, I noticed the small black wire that goes to the small ' - ' terminal on the solenoid was cut. This is the wire that goes to a plug below the solenoid. It has a partner red wire that goes to the small ' + ' term on the solenoid. I guess when he installed the solenoid he must have pinched or otherwise damaged this wire. It was obviously hampering the circuit from completing to the relay. I installed a new ring terminal, hooked the black wire back up and we are back up and running! Thanks for your insight! |
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