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My VFR won't start there's no gas injection!


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Hi!! My VFR it's a us version, there's no HISS on the tachometer , I just changed the spark plugs, then my bike won't start , I checked all negative (ground)point, the Fuel pump works the first 2 second, when I started up just crank it up, I tried to put some gas on the injectors zone then the motorcycle star it up, for a moment, so, I think there's not injection of gas, I changed the ECU and nothing , I read that there's a pink cable on the ECU , on the white connector,  I checked there's only 4.5 volts, that's correct? Someone can help out? 

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1. What plugs did you use? Brand and part number.

2. Does the Fi Light go out as you hear the Fuel Pump stop after switch on prime, or does the Fi Light remain On?

3. Do you have any Fi flashing codes?

4. Bike in Neutral raise the Side Stand try a start. Does this make any difference to starting?

5. If the bike was running before changing the plugs, suggest refitting the original ECM.

6. Check your Ignition Switch wiring if you suspect you have the Pink security wire, see attached. If you do you must measure 9v on this wire.

IgSwitDiode6s.png.31e638134de792731d1da0b93ad64e7b.png

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Hi!! Thanks for help me out, 

1 - the plug are grey and black with 33 pin each one  , 38770-MCW- K01, 8561-103073 KEIHIN 

2- the Fi light remaining on never go out 

3- only 23 and 24 

4- the same 

5- I'll to take it out,  and only see 4

 

IMG_20240522_172625.thumb.jpg.d4cfa40be076dc0399257b8d33d5500f.jpg

 

 

 

wire 

IMG_20240522_172625.thumb.jpg.d4cfa40be076dc0399257b8d33d5500f.jpg

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1. What Spark Plugs, not ECM plugs?

2. Do you have the Sidestand Down? ECM will not flash a code unless Sidestand is Down.

5. Do you have the original ECM fitted?

 

Codes 23 and 24 are for the Oxygen Sensors

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1- I don't understand, not ECM plugs?

2- no, I have sidestand up,

5 , yes , it's original, well that's the motorcycle bring with it, 

17164171600336631223927290919629.jpg

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1. You fitted new Spark Plugs. What are they NGK? What part number are the Spark Plugs fitted?

2. Lower the Sidestand, what codes if any do you read? Are you still getting only 23 and 24?

 

Was the bike running Before you changed the Spark Plugs??

 

Do you have the Service Manual? You can download it from this forum.

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I don't have the service manual, do you have a Link? 

I got a new NGK sparkplugs, if you see the video the motorcycle try to start it up with a little bit of gas 

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Really I don't know what to do else, I checked every point,  I think probably can be the ignition switch, because don't turn it up the Fi light, 

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Please answer this question first: was the bike working correctly before you changed the spark plugs?

 

If it was working correctly, please check all the electrical connectors are secure. Remount the airbox. Put the sidestand down and try starting.

 

If that does not solve the issue, please go back to Grum's first post (the first reply) and answer the questions exactly. Make sure the sidestand is down.

 

 

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40 minutes ago, otidum said:

Someone knows what it's the 3 pin? 

 

17164928168391500500571249988579.jpg

Clutch and Neutral Diode.

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42 minutes ago, otidum said:

Or this little block of 3 pin, 

17164929336505085465990569195975.jpg

Possibly Turn Relay, what color wires go to it?

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It is very difficult to help you. 

Need to answer the questions you are asked.

Jumping around onto the next thing you thought of is not a way to solve your problems.

 

So over to you. Cheers 

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Thank for your help,  I was working, I got a question, how the bike put down 12 v to 9 v to de the Pink wire into the ECM? The bike t

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4 hours ago, otidum said:

The Pink wire on the ECM got only 4.5v, 

BUT.....Does that Pink Wire at the ECM go to the Ignition Switch? Or to some other device? YOU NEED TO CONFIRM THIS.

Do you have the Pink wire at the Ignition Switch AND the small Zener Diode As per the picture I posted for you?

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