efi 125 starts then dies.... - Page 2

thumpa · 02-07-2023, 01:35 PM

hi clash! thanks for the reply. will give that a go. not had chance today, woke up with a trapped nerve in my shoulder... agony! will report back asap.

what is the reason for disconnecting the ground for the shut off from switch and or computer? i will try that but i like to know why i am doing something.
no sign of corrosion - i keep it indoors and am a 'fair weather biker', plus being in spain helps! it only has 3 fuses so i will check them out.
cheers!

clash 168cc · 02-08-2023, 01:30 AM

I read on here or saw on youtube that one of the grounding shut off wires could stop it from running. Might not help.

thumpa · 02-08-2023, 02:58 AM

hi clash. thanks for the update - so it would start and run briefly and then die if the shut off wires were grounded? i will look into it. thanks again.

clash 168cc · 02-08-2023, 10:25 AM

I can't remember. I think it wouldn't run at all.

**JerryHawk250** · 02-08-2023, 10:47 AM

Order a coil. They are cheap. I assume you installed a new plug. Is it getting a good strong spark when cranking?

thumpa · 02-08-2023, 11:02 AM

hi jerry - what is 'under a coil'? not sure what you mean.

re: spark plug, yes, new, but as i said at the start - i tested the spark plug when i turn the engine over it sparks for 2 seconds and then nothing until i switch off the ignition and back on again. still the same today. it's as if the ecu is killing the spark within two seconds - same each time. battery fully charged.

re: error codes - i get error codes if i unplug things like temp sensor / tps / iac / fuel pump. no error if coil unplugged but i don't think it monitors coil connection (?)

ohms check on stator and pulse look within tolerance.

would a coil just die after being great (new bike 3 and a half years ago) - it was standing for about nine months and no issues on last day i rode it.

cheers!

**JerryHawk250** · 02-08-2023, 11:09 AM

Yes a coil can go bad. Your coil will look similar to this one. https://www.amazon.com/Replacement-P...s%2C174&sr=8-6

thumpa · 02-08-2023, 11:12 AM

weirdly i was looking on amazon spain at the identical item!

thumpa · 02-10-2023, 08:03 AM

coil arrived but they sent a single wire coil! wil be sending back!

**JerryHawk250** · 02-10-2023, 08:12 AM

It should still work. The single wire is the power source. All you need to do is ground the coil to the frame.

thumpa · 02-10-2023, 08:16 AM

cheers jerry, i wasn't going to try but will try later. cheers!

thumpa · 02-10-2023, 10:20 AM

sorry to day it didn't work. :(

J4Fun · 02-10-2023, 10:51 AM

Quote:

Originally Posted by thumpa

hi there, thanks for the reply. the battery is fine. it's a year old lifepo4 battery which i have found very impressive for it's size. had it starting a 250 for a while with no problems.
i actually used scan software to monitor live data and it did not drop when turning over.
give me a carb and points or cdi anyday

cheers.

Hey thumpa,just another thought here about the battery? Since the bikes been sitting 9 months was the lifepo4 the only change? Just curious if you hooked up a multimeter to detect voltage while starting? I have a ‘20 Hawk DLX and was wondering what’s going on with your bike because it could happen to mine also. Thinking outloud….

thumpa · 02-13-2023, 04:45 PM

ordered a coil from a different amazon seller and waited in all day for it, the tracking said 'out for delivery by 10pm' and just after 10pm they messaged to say 'nobody home' - classic courier b.s.! so now i have to wait again! aaarggh!

p.s. could not use the single pole coil as the efi system on my bike uses 2 wires, one is 12v and the other is used to ground the coil via the ecu, which is how it generates a spark. connecting the single pole coil with the body permanently earthed causes a blown fuse!

thumpa · 02-14-2023, 10:46 AM

new coil arrived. description said '2 pins' - photo showed coil with 2 spade connectors. coil they sent was a single pin coil!

arrrrrrrrrrrrrrrrrrrrrrrrgggggggggggggggggggggghhh hhhhhhhhhhhhhhhh!

02-08-2023, 10:47 AM	#20
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	Order a coil. They are cheap. I assume you installed a new plug. Is it getting a good strong spark when cranking? __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
	0

02-08-2023, 11:09 AM	#22
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	Yes a coil can go bad. Your coil will look similar to this one. https://www.amazon.com/Replacement-P...s%2C174&sr=8-6 __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
	1

02-10-2023, 08:12 AM	#25
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	It should still work. The single wire is the power source. All you need to do is ground the coil to the frame. __________________ 2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel
	0

02-07-2023, 01:35 PM	#16
thumpa Join Date: Feb 2023 Posts: 24	hi clash! thanks for the reply. will give that a go. not had chance today, woke up with a trapped nerve in my shoulder... agony! will report back asap. what is the reason for disconnecting the ground for the shut off from switch and or computer? i will try that but i like to know why i am doing something. no sign of corrosion - i keep it indoors and am a 'fair weather biker', plus being in spain helps! it only has 3 fuses so i will check them out. cheers!
	0

02-08-2023, 01:30 AM	#17
clash 168cc Join Date: Jul 2022 Posts: 94	I read on here or saw on youtube that one of the grounding shut off wires could stop it from running. Might not help.
	0

02-08-2023, 02:58 AM	#18
thumpa Join Date: Feb 2023 Posts: 24	hi clash. thanks for the update - so it would start and run briefly and then die if the shut off wires were grounded? i will look into it. thanks again.
	0

02-08-2023, 10:25 AM	#19
clash 168cc Join Date: Jul 2022 Posts: 94	I can't remember. I think it wouldn't run at all.
	0

02-08-2023, 11:02 AM	#21
thumpa Join Date: Feb 2023 Posts: 24	hi jerry - what is 'under a coil'? not sure what you mean. re: spark plug, yes, new, but as i said at the start - i tested the spark plug when i turn the engine over it sparks for 2 seconds and then nothing until i switch off the ignition and back on again. still the same today. it's as if the ecu is killing the spark within two seconds - same each time. battery fully charged. re: error codes - i get error codes if i unplug things like temp sensor / tps / iac / fuel pump. no error if coil unplugged but i don't think it monitors coil connection (?) ohms check on stator and pulse look within tolerance. would a coil just die after being great (new bike 3 and a half years ago) - it was standing for about nine months and no issues on last day i rode it. cheers!
	0

02-08-2023, 11:12 AM	#23
thumpa Join Date: Feb 2023 Posts: 24	weirdly i was looking on amazon spain at the identical item!
	0

02-10-2023, 08:03 AM	#24
thumpa Join Date: Feb 2023 Posts: 24	coil arrived but they sent a single wire coil! wil be sending back!
	0

02-10-2023, 08:16 AM	#26
thumpa Join Date: Feb 2023 Posts: 24	cheers jerry, i wasn't going to try but will try later. cheers!
	1

02-10-2023, 10:20 AM	#27
thumpa Join Date: Feb 2023 Posts: 24	sorry to day it didn't work. :(
	0

02-13-2023, 04:45 PM	#29
thumpa Join Date: Feb 2023 Posts: 24	ordered a coil from a different amazon seller and waited in all day for it, the tracking said 'out for delivery by 10pm' and just after 10pm they messaged to say 'nobody home' - classic courier b.s.! so now i have to wait again! aaarggh! p.s. could not use the single pole coil as the efi system on my bike uses 2 wires, one is 12v and the other is used to ground the coil via the ecu, which is how it generates a spark. connecting the single pole coil with the body permanently earthed causes a blown fuse!
	0

02-14-2023, 10:46 AM	#30
thumpa Join Date: Feb 2023 Posts: 24	new coil arrived. description said '2 pins' - photo showed coil with 2 spade connectors. coil they sent was a single pin coil! arrrrrrrrrrrrrrrrrrrrrrrrgggggggggggggggggggggghhh hhhhhhhhhhhhhhhh!
	0