fuel injector

[bluesdog]

Anyone have a spare injector they can sell me? Yamaha dealer says new ones are back-ordered, which could mean a month or so before I can expect one. :blink:

I'm going to attempt a re-build of the malfunctioning one, but even if it works again, I won't trust it

I'll pay full price plus shipping for a good injector

Help! :dribble:

 

[ionbeam]

Holy cow! That is really6 rare. How did you determine the injector is bad?

 

[bluesdog]

Holy cow! That is really6 rare. How did you determine the injector is bad?

Couldn't get a good vacuum on #4, whilst doing a TBS.

Swapped #3 for #4, after checking spark plug first.

I still can't believe it. Gonna pull the thing again today, and see if there's a local shop that can clean & service it. Maybe I'll be lucky and the thing is only badly clogged.

If I can't get it fixed, and/or get a replacement soon, I guess my riding is over for a while

 

[03HiYoSilver]

... Maybe I'll be lucky and the thing is only badly clogged.

If I can't get it fixed, and/or get a replacement soon, I guess my riding is over for a while

Being Clogged is usually the case. Does your Yamaha Shop have a UltraSound Cleaner?

Also, if you bike is still under warranty, make sure this is documented by Yamaha/Your Dealer... I hope it is.

 

[HaulinAshe]

I have injectors on my used 2007 throttle body. May also have a lead on some extra injectors. Let me check.

Email me at haulinashe at gmail dot com to discuss details.

 

[bluesdog]

... Maybe I'll be lucky and the thing is only badly clogged.

If I can't get it fixed, and/or get a replacement soon, I guess my riding is over for a while

Being Clogged is usually the case. Does your Yamaha Shop have a UltraSound Cleaner?

Also, if you bike is still under warranty, make sure this is documented by Yamaha/Your Dealer... I hope it is.

Checked the injector for operation by hooking up DC 5v adaptor, and could hear the solenoid click each time I shorted the terminals. I compared it to a known 'good' injector, and to my ear they sounded identical.

Sooo, I'm going with the 'badly clogged' diagnosis.

The Yamaha shop doesn't have any better cleaning method than I do, but I eventually found a local service that specializes in injectors and fuel systems, which does have an ultrasonic cleaner.

I've ordered all new o-rings and gaskets, as recommended in the FSM for re-assembly of the injectors in the fuel rail and injector ports.

I think I'll go ahead and buy a spare injector from HaulinAshe, anyway...

With a bit of luck, I'll be back in the saddle this weekend :yahoo:

Thanks friends!

 

[Fred W]

When you do clean the old one, do us all a favor and document the procedure and how it comes out.

It would really good if there were some easy way to hook it up to the fuel rail and test it shooting into a bucket or some-such before and after. I think you should be able to do that pretty easily (once you figure out the physical part) by using the Diag screens.

There are a few folks around here with some accumulated miles on their FJRs that may want to give injector cleaning a go someday.

 

[HaulinAshe]

Grumpy used CruzinPerformance for injector service and matching.

https://www.cruzinperformance.com/

He was able to gather a set of four(4) that were within 1% of each other.

 

[lnewlf]

And once you're all squared away use this..

https://www.simyamaha.com/Yamaha_Yamalube_Ring_Free_Fuel_Additive_p/acc-rngfr-pl-32.htm

 

[HaulinAshe]

The loose injectors I had in mind are from an '03 and carry a different part number. OP may still be looking for single used injector as a spare. I prefer to leave my spare throttle body intact if OP's repairs are successful.

 

[bluesdog]

Hi guys.

I had the injectors cleaned and flow-tested a few days ago by a local semi-retired mechanic at his home garage. He did a thorough job, and the total bill was $60 CDN

As Fred W suggested, I documented the procedure, with pics, on my website.

Happily, the ultra-sonic cleaning appears to have restored full function

Inewlf, so far I've been unable to locate Yamaha ring-free, although the local stealership says they can order it. I will be getting some soon, although in the past I've had good results from gumout FI cleaner, and I did use yammy fuel treatment when I stored the bike last winter.

HaulinAshe, the same dealership contacted a Yamaha tech, who claims the gen I injectors will fit the gen II, so I may take a chance and order one as a spare.

 

[Fred W]

Nice!! Thanks for taking the time and energy to document the cleaning. Unfortuantely, not something any of us are going to be able to do at home, but still very informative.

I'm surprised at how the ultrasonic cleaner was used. It appears it was only cleaning the injector tips externally? And a solution was applied internally during the ultrasound?

I guess the proof is in the pudding and the leak and flow tests would confirm that they are all working correctly. Do you happen to know what happens during the flow test? Are the injectors just being flow tested wide open or are they also being pulsed? I'm just wondering if that test would catch a solenoid that was slow or sticky.

I know, lot's of questions. That's why they say, "No good deed goes unpunished!"

 

[Donal]

As has been said, many thanks for going to the trouble of documenting this, very informative :clapping: .

I too have a question - at the beginning you show a 'screen' being pulled, but there is no mention of new screens being installed (or the old ones being refitted). Did I miss something?

Thanks

Don

 

[bluesdog]

Nice!! Thanks for taking the time and energy to document the cleaning. Unfortuantely, not something any of us are going to be able to do at home, but still very informative.

I'm surprised at how the ultrasonic cleaner was used. It appears it was only cleaning the injector tips externally? And a solution was applied internally during the ultrasound?

I guess the proof is in the pudding and the leak and flow tests would confirm that they are all working correctly. Do you happen to know what happens during the flow test? Are the injectors just being flow tested wide open or are they also being pulsed? I'm just wondering if that test would catch a solenoid that was slow or sticky.

I know, lot's of questions. That's why they say, "No good deed goes unpunished!"

The ultrasonic cleaning actually does clean the internals of the injectors. The injectors are pulsed during the process, and the injectors are manually loaded and re-loaded with solution over a 10-minute period.

During flow testing, the injectors are again pulsed, but this time are receiving a different solution, at operating pressure. I'm not sure that test would reveal a slow or sticky solenoid. I'll have to ask Marvin next time I talk to him.

As has been said, many thanks for going to the trouble of documenting this, very informative :clapping: .

I too have a question - at the beginning you show a 'screen' being pulled, but there is no mention of new screens being installed (or the old ones being refitted). Did I miss something?

Thanks

Don

Y'know, I was so entranced by the cleaning/testing on the machine, I totally forgot to take pictures or mention about refitting new screens! I can describe the procedure, tho', and have added the following to the article:

Once the cleaning and testing was complete, new screens were installed. I neglected to take pictures of the screens being pressed into place, however, since the brass top of the filter screen sits flush with the end of the injector intake oriface, it's a simple matter of inserting the new screen into the intake oriface, wrapping the injector with the clean shop rag, then pressing the screen firmly into place against a clean, hard surface. In this case, the metal workbench was 'pressed into service'..

 

[Donal]

Thanks for the update :clapping: I can rest easy now knowing the job is complete

Don