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meh

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Reply with quote  #1 
Has anyone been sucessful in building a test setup to clean there injectors?
seahorse

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Reply with quote  #2 
use the SEARCH function for   FUELINJECTORMAN
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meh

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Reply with quote  #3 
Yes I have seen his site, and talked to him. Its hard for me to put in the mail my injectors and he wants, when I live in the same town as him. From everything I have headr does good work.
canyonero

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Reply with quote  #4 
Given the high incidence of dirty injectors, I would really love to see a video showing how to remove, clean, and reinstall injectors. I understand it isn't too complicated to remove and replace them (cleaning I don't know). Any professionals willing to to help us etec owners out that way?
kitebuz

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Reply with quote  #5 
My understanding is that, while you can clean the small external filter on the injector and possibly the tips, the only way to really clean out the injector to original efficiency is by the specialized injector cleaning machines (ultrasonic I think).  They will also test & confirm your spray pattern is what it should be. 

If I am going to spend the time & effort to pull all my injectors, I figure I might as well send them in for a proper testing & cleaning vs doing a marginal cleaning on my own.

In short (& as usual), follow Seahorse's advice...
LourPitcher

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Quote:
 the only way to really clean out the injector to original efficiency is by the specialized injector cleaning machines (ultrasonic I think).  



I think the commercial offered cleaning service is not ultra-sonic (EDIT: the website has indicated the process now does include ultrasonic cleaning).....The removed injectors were said (publically) to be ran somewhat normally, but in a bath solution of simple water and a common detergent.

An alternate 'do-it-yourself method I have looked into is to soak the injectors in a high-detergent gum and varnish dissolving commercial fuel treatment preferably having metal protecting anti-oxidizers and corrosion inhibitors. The mesh pre-filter and nozzle filters * if desired, can be disassembled and reached directly and be separately cleaned inspected. The nozzle itself is spring loaded and by compressing, can be manually opened/closed.  

As the cleaning solution will not free-flow through the injector, the EvDiag softare could be possibly used to pulse the  injector and assist in moving/agitating the cleaner/solvent within the injector internals if desired.   On reassembly, immediately running the injector in the E-TEC may help to further clear remaining solvent loosened corrosion/particles.   

Compared with professional cleaning, this method may prove less successful in fully clearing/cleaning dirty injectors and it does not give the pass/fail of the injectors ability to output a proper spray pattern,  but it avoids exposure of the injector internals to water.

*
Nozzle w/spring and nozzle filter




Pre-filter (mesh) is visable above (in black circular ring around the injector body)


canyonero

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Reply with quote  #7 
If I could get 70% of the crud off my injectors without having to send them in and at no cost, I would certainly do it. According to Lou P, we might even be able to clean 100% of them.

Video please.
LourPitcher

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Reply with quote  #8 
C.,

Not intending to be implying that owners might be able to clean 100% of dirty injectors.   

Soak cleaning of automotive  and other types of fuel injectors surely is not new.  And this very forum has previously documented the ability for do-it-yourself owners to remove/inspect their E-TEC's  injector filters. 

I do suspect that many dirty injectors primarily only have blocked filters or output nozzles and if so, those might have a decent recovery success rate after a good cleaning.  If not successful, there's the professional cleaning option which may work or well find the injector is simply defective.

canyonero

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Reply with quote  #9 
Well said, Lou. Interested owners could try the home-clean method--that might well produce completely clean injectors. If that doesn't satisfy them, then send them out for cleaning.

canyonero

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Reply with quote  #10 
Thanks for the pictures and explanation, Lou.

Jim, your points are all very good. I wouldn't think dirty injectors would be much of an issue either. Nonetheless, a review of this board would indicate otherwise. It looks like it is a very common issue, and the removal, mailing, and reinstallation of cleaned injectors is often recommended by people who make their living working with these engines.

jimh

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Reply with quote  #11 
If disassembly of the Evinrude E-TEC engine fuel injectors were a common, routine, and mandatory part of operation of the engine, I suspect that there would need to be hundreds of facilities to provide the service to the thousands and thousands of E-TEC owners that would require it. In actual fact, there seems to be only one facility offering to clean injectors.
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kitebuz

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Reply with quote  #12 
Great description LourP - thank you!  I have a feeling what you have described would likely be enough to clean up my injectors.  Is it difficult to pull the injector out of the casing and remove the tip w/ regular tools?

Now, just that I read it on the internet doesn't make it true, but injectorman does claim to use an "ultrasonic cleaner".  I have no idea what that actually means.    

I think I will send in one set of my injectors & see how that engine compares to the other in terms of rpm smoothness from 1200-1800 where mine are currently rough, and also in fuel burn at various rpms.  If I see a marked difference, I will likely send in the other set.  If not, I would just go thru the other engine's injectors as LourPitcher outlined. 

Jimh:  I would say the main differences between your truck & etec are 1)  open vented fuel tank to draw in moisture 2) etec is direct injection which is much finer.  Sounds like some of the auto DI engines are seeing some issues w/ fouled injectors.

Here is how IM outlines their service:

Our Fuel Injector Service
*  The injectors are installed in the test equipment and each coil is checked and load tested.* 

The next step is to leak test the injectors @ 43 PSI.*
The injectors are then run through a series of spray pattern test @ different rpms. 200 rpms for
starting, 600 rpms for idle, 1500 rpms, 2500 rpms, 10,000 rpms and then Static.*
Then the
injectors are flow tested @ 2500 rpms and then static (wide open).*

The injectors are then removed from the test equipment and the filters removed.*
All the injectors are put into a Ultrasonic cleaner and operated @ different rpms.
Opening and closing the injectors while they are being cleaned helps remove the contaminations.*

After cleaning the injectors are put back into the test equipment and they are leak tested,
spray pattern tested and flow tested again.* If any of the injectors do not reach 100% they
are cleaned again and tested until they reach 100%. * New filters are then installed and
packaged for shipment.*
With your injectors you will receive a Service Diagnostic Report that will show a
comparison of all the injectors before and after cleaning.* Please send all the o-rings and
parts that are on the injectors. We will send all the old parts back.We need the old parts to
correctly match the new parts to your injectors.


LourPitcher

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Reply with quote  #13 
Kitebuz,

Thanks for clarifying about the 'ulta-sonic'step being in the cleaning process.... I was unaware having only observed and read of  the removed injectors being powered up and circulating the cleaning solution from a rather simple reservoir bath.  

In removing the nozzles from my injectors, it was not difficult.....I only used common gripping tools with help of a vise to hold the assembly.   When the nozzle is separated, its' filter then just slips off for inspection and cleaning.  

Removing  the injector from the housing was slightly difficult and may not be needed unless you want to access and directly clean the pre-injector 'ring" filter.  For this, a BRP tool is available however, all I found needed was to make a simple drilled hole into a scrap metal plate that used with a threaded bolt.  This  allowed the metal plate to be tapped with a small hammer to help the injector to separate.   A BRP part number listed crush ring is available for use in reassembly and was documented earlier on this forum.


LourPitcher

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Reply with quote  #14 
In our E-TEC's fuel system, our very unique design E-TEC injectors receive pressurized fuel delivered from the Vapor Separator Tank or VST.  The fuel is used both to supply and to cool the heat producing injector.  Unused fuel is recirculated back to the VST for heat removal which is assisted by a water fed coil.   The hot returning fuel returning from the injectors passes through a small cone filter *  at its entrance to the VST.

This cone fuel filter to me, can perhaps be thought of a 'canary in a coal mine'.  It sees essentially the same heated fuel as the filters within our injectors. In its location in the fuel system design, it can only filter and clean fuel that has already passed through the injector's  fuel housings.  The injectors have in effect, been already exposed to this fuel stream.  

This relatively easy to remove VST filter for some has been shown to be clogging from E-TEC generated particulates and/or fuel deposits perhaps from heated gasoline/potashes/benzenes and other known undesirable products contained in our blended fuels.  If it is clogging and needs cleaned, it may can serve as a flag (as our canary) that we also have blockages developing within our fuel injectors. 

*

(I suspect in this owner's photo, the small black particles are from wear and tear of the fuel pump diaphragm  and/or internals which would have a direct and  unfiltered path into our injectors and be quite unaffected by fuel tank additive cleaners. )
seahorse

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Reply with quote  #15 

Quote:
Originally Posted by LourPitcher


(I suspect in this owner's photo, the small black particles are from wear and tear of the fuel pump diaphragm  and internals which would have a direct and  unfiltered path into our injectors and be quite unaffected by fuel tank additive cleaners. )





Lou,

In most of the V4 and V6 engines, the lift pump diaphragm is BEFORE the 10 micron spin on filter. On earlier V4 and 60° V6 engines and the inline outboards, the fuel pump is BEFORE the plastic filters which have an unknown micron rating.

In both cases, the fuel is filtered before reaching the injectors.

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