F4i wont start. I've done everything I can think of.
10-04-2010, 08:23 PM
#21
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Location: Santa Rosa, CA
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Re: F4i wont start. I've done everything I can think of.
Update:
I went by the FSM on how to diagnose this problem and it said check peak voltage on cam pulse generator, ignition pulse generator and the yellow wire on the grey plug side that goes to the ECM. the ignition pulse and cam pulse should get a minimum of .7V and I forgot about the yellow wire that goes to ECM but I never got any reading on all three while cranking and not cranking. So I have no idea what is going on. Please help!!!!!!!
I went by the FSM on how to diagnose this problem and it said check peak voltage on cam pulse generator, ignition pulse generator and the yellow wire on the grey plug side that goes to the ECM. the ignition pulse and cam pulse should get a minimum of .7V and I forgot about the yellow wire that goes to ECM but I never got any reading on all three while cranking and not cranking. So I have no idea what is going on. Please help!!!!!!!
10-04-2010, 10:12 PM
#22
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Re: F4i wont start. I've done everything I can think of.
10-04-2010, 10:19 PM
#23
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Re: F4i wont start. I've done everything I can think of.
Anyways.....
Some real help please.
10-05-2010, 02:30 AM
#24
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Location: NASHVILLE, TN
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Re: F4i wont start. I've done everything I can think of.
im still thinking ignition, Roger is right its not uncommon with F4is ,
Ive also had one of the four soudered leads break loose from their soudering in my throttle housing before, so I would check that, take the two screws out and the single retainer screw out of the bottom half taht holds a small metal bracket in place then look at the 4 soudered leads and make sure none of them have not broken free
Ive also had one of the four soudered leads break loose from their soudering in my throttle housing before, so I would check that, take the two screws out and the single retainer screw out of the bottom half taht holds a small metal bracket in place then look at the 4 soudered leads and make sure none of them have not broken free
10-05-2010, 11:07 AM
#25
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Re: F4i wont start. I've done everything I can think of.
im still thinking ignition, Roger is right its not uncommon with F4is ,
Ive also had one of the four soudered leads break loose from their soudering in my throttle housing before, so I would check that, take the two screws out and the single retainer screw out of the bottom half taht holds a small metal bracket in place then look at the 4 soudered leads and make sure none of them have not broken free
Ive also had one of the four soudered leads break loose from their soudering in my throttle housing before, so I would check that, take the two screws out and the single retainer screw out of the bottom half taht holds a small metal bracket in place then look at the 4 soudered leads and make sure none of them have not broken free
10-05-2010, 01:02 PM
#26
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Re: F4i wont start. I've done everything I can think of.
you say you are getting voltage but does one of the wires have less voltage than the others ? one of them is supposed to be lower than the rest to let the computer know the key is being used and the bike is not being hot wired , if that one wire isnt at the lower voltage the computer wont let the bike start
10-05-2010, 04:15 PM
#27
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Re: F4i wont start. I've done everything I can think of.
you say you are getting voltage but does one of the wires have less voltage than the others ? one of them is supposed to be lower than the rest to let the computer know the key is being used and the bike is not being hot wired , if that one wire isnt at the lower voltage the computer wont let the bike start
10-05-2010, 04:33 PM
#28
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Re: F4i wont start. I've done everything I can think of.
i dont remember the color but there are only a few wires coming out of the ignition switch if one of them doesnt read like 7 volts then the resistor is probably blown ..
most of the wires with power will be 12 volts but one should be lower , if all the wires with power are twelve volts then you know there is an issue .
most of the wires with power will be 12 volts but one should be lower , if all the wires with power are twelve volts then you know there is an issue .
10-05-2010, 04:40 PM
#29
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Re: F4i wont start. I've done everything I can think of.
i dont remember the color but there are only a few wires coming out of the ignition switch if one of them doesnt read like 7 volts then the resistor is probably blown ..
most of the wires with power will be 12 volts but one should be lower , if all the wires with power are twelve volts then you know there is an issue .
most of the wires with power will be 12 volts but one should be lower , if all the wires with power are twelve volts then you know there is an issue .
10-05-2010, 09:47 PM
#31
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Re: F4i wont start. I've done everything I can think of.
Ok so heres the results.
The Red/Black wire has 12 V
The Red wire has 12 V
The Blue/Orange wire has 12 V
And the Pink wire has 9.34 V
Then I checked the diode's volts.
The diode on one side read 12 V and the other side read 9.34 V
So looks like every things all good with ignition I assume.
10-06-2010, 02:12 AM
#32
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Re: F4i wont start. I've done everything I can think of.
Ok so heres the results.
The Red/Black wire has 12 V
The Red wire has 12 V
The Blue/Orange wire has 12 V
And the Pink wire has 9.34 V
Then I checked the diode's volts.
The diode on one side read 12 V and the other side read 9.34 V
So looks like every things all good with ignition I assume.
The Red/Black wire has 12 V
The Red wire has 12 V
The Blue/Orange wire has 12 V
And the Pink wire has 9.34 V
Then I checked the diode's volts.
The diode on one side read 12 V and the other side read 9.34 V
So looks like every things all good with ignition I assume.
i would have bet money too ..lol sorry
10-06-2010, 11:22 AM
#33
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Re: F4i wont start. I've done everything I can think of.
sounds like it should work ...
dumb question though ... do you have your gas tank properly connected to the main wiring harness ?
try a buddy's ECU ... might be bad
dumb question though ... do you have your gas tank properly connected to the main wiring harness ?
try a buddy's ECU ... might be bad
10-06-2010, 11:33 AM
#34
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Re: F4i wont start. I've done everything I can think of.
10-06-2010, 11:35 AM
#35
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Re: F4i wont start. I've done everything I can think of.
I'll check to see if theres a bad connection. would that cause no spark?
And I don't have a friend with a f4i. I'm trying people on craigslist selling f4i's but they don't want to help. So it looks like I just have to wait until that comes in the mail.
10-06-2010, 01:20 PM
#36
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Re: F4i wont start. I've done everything I can think of.
with the pump connected in the main harness try to prime the pump by attaching a probe (this is how you call it right? from the multimeter) on the brown wire (from main harness connector) and the other end (which goes into the multimeter) directly on the plus of the battery - it should prime for as long as you keep them connected
10-08-2010, 12:40 AM
#37
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Re: F4i wont start. I've done everything I can think of.
with the pump connected in the main harness try to prime the pump by attaching a probe (this is how you call it right? from the multimeter) on the brown wire (from main harness connector) and the other end (which goes into the multimeter) directly on the plus of the battery - it should prime for as long as you keep them connected
10-08-2010, 02:00 AM
#38
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Re: F4i wont start. I've done everything I can think of.
I installed a new ECM today and the bike fired up perfectly. I rode it around for a while then I put all fairings and stuff on and after I connected the headlights it wouldnt start anymore. I disconnected the headlights and still nothing. I guess I blew it again. I dont get it tho because the headlight wires dont go to the ecm.
are you sure it didnt just blow the main 30 amp fuse ? kawi head light wiring is funky as hell , the head light doesnt turn on with the key it turns on when you hit the start button so it may actually go through the computer
10-08-2010, 12:59 PM
#39
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Re: F4i wont start. I've done everything I can think of.
But yea new ECM did the trick. Bike runs beautifully and I got all lights working again.
So thanks to everyone who helped and hopefully this will help others with the same problem.
