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johnnyv4449

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Posts: 15
Reply with quote  #16 
thank you for the suggestions. I'm going to run the lift pump vacuum test tomorrow. The bulb actually never gets firm. I just replaced the bulb yesterday and I do feel fuel in it when it pumps but it never gets firm.  Is there a video on how to clean the vst float valve? I see that there are small filters in line in the actual nipple on the tank.

Question on the vacuum test.  I assume i can attach the clear tube right after the ball? In the vacuum test, if I have air bubbles what it that telling me? Air leak somewhere between the tank and engine?
PhilH12

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Posts: 2,831
Reply with quote  #17 
You can try removing the VST vent hose and squirting carb cleaner into the VST nipple, wait a bit, repeat, and then try gently squeezing the bulb.  See if fuel comes out the nipple.  (Actually you can try without squirting anything first, just to see if there is fuel coming out.)  If the cleaner doesn't get it working, you may have to remove the VST cover.

That little VST filter could be checked/cleaned too, while you're around the VST.

Just try to get as close to the engine as possible with the clear hose and "T" for the vacuum.  Yes, bubbles say that there are air leaks into the lines back toward the fuel tank.  Gotta find and fix those.

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
johnnyv4449

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Posts: 15
Reply with quote  #18 
I ran a clear tube between the ball and the engine. As soon as i started it I had bubbles in the lines. (I didn't have the vacuum gauge) I cut all of the lines back at every joint ans I think I had one tear leaking air. I then ran the boat and had no air in the lines. The boat still runs very rough at isle and just does not seem right. Does anyone know of a video that covers cleaning the vst? 

As I understand it there is both fuel and water that run through the VST correct? 
Shahradivans

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Posts: 8
Reply with quote  #19 
Well it's me again. I had the same problem and now I have cleaned and replaced the whole fuel and the VST system, replaced my spark plugs, replaced the spark plug wires and replaced all of my filter. It did not help and my engine got worse. I called a Evinrude mechanic to come and check my engine. It turned out that one of my injectors was unstable and at the end it give up. So I have to replace one of my injectors. I am 100% sure that your problem is also injector issue. For me it started just like yours, losing power some times and finally its stuck at 2000RPM and engine sound has been much louder and deeper which indicates that my motor is running in 2 cylinder.
PhilH12

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Posts: 2,831
Reply with quote  #20 
Here's a video of VST disassembly.  Yours may not be "exactly the same" but close enough for government work.  [wink]  That float valve up top shuts off the incoming fuel, so that it's not flooding the engine.  Yes, the tank itself is full of fuel, and water runs through that internal coil.

EDIT:  See 3:55 in the video for that float valve.

  https://www.etecownersgroup.com/post/show_single_post?pid=1282142503&postcount=31&forum=115574

As Shahradivans suggests, it may be a good idea to "Ohm test" the injectors, as well as the wiring harness.  I'd be peeved if I spent multi-hundreds of $$$ on injector(s) and found out later it was a $2 piece of wire or a $5 harness connector, or a $50 injector (each) cleaning job.  [frown]

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
PhilH12

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Posts: 2,831
Reply with quote  #21 
PS - Before taking the whole VST apart, did you try undoing that top hose and Gently squeezing the bulb?  If much fuel comes out, that float valve does need attention.

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Shahradivans

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Posts: 8
Reply with quote  #22 
Quote:
Originally Posted by PhilH12
Here's a video of VST disassembly.  Yours may not be "exactly the same" but close enough for government work.  [wink]  That float valve up top shuts off the incoming fuel, so that it's not flooding the engine.  Yes, the tank itself is full of fuel, and water runs through that internal coil.

EDIT:  See 3:55 in the video for that float valve.

  https://www.etecownersgroup.com/post/show_single_post?pid=1282142503&postcount=31&forum=115574

As Shahradivans suggests, it may be a good idea to "Ohm test" the injectors, as well as the wiring harness.  I'd be peeved if I spent multi-hundreds of $$$ on injector(s) and found out later it was a $2 piece of wire or a $5 harness connector, or a $50 injector (each) cleaning job.  [frown]

Phil

I actullay have "ohm tested" my injectors" All of my 3 injectors had 3ohm and 2.7 Ohm. Does this mean that my injector is not broken? Maybe it just need a cable replacement or cleaning?
PhilH12

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Posts: 2,831
Reply with quote  #23 
Quote:
Originally Posted by Shahradivans

I actullay have "ohm tested" my injectors" All of my 3 injectors had 3ohm and 2.7 Ohm. Does this mean that my injector is not broken? Maybe it just need a cable replacement or cleaning?


Absolutely possible that the injector heats up and then doesn't work - the same as the HP fuel pump may also do.  My personal preference is to fully check the $5 parts before just replacing the $500 parts.  [wink]

EDIT:  If the injectors Ohm'ed OK, I would send them for professional cleaning first.  The "heating and quitting" would be found during the cleaning process since they are running on the 55V during the cleaning.  The risk there is only the shipping cost of a bad injector, and then you would know for sure.  Finding bad wiring or harness connections is more of a cost of time than the parts themselves to fix.  Buying new injectors when having a wiring problem between the EMM and injectors won't help.

This case here is still up in the air, and still checking the Easy stuff First.  Eagerly awaiting the VST vent and bulb squeeze test myself, because it was said that the bulb won't get firm.  Sounds like flooding the engine to me.

Phil

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Always check the Easy Stuff First!
20' Weeres fishing pontoon
90 HP E-Tec E90DPLSUM  05184332
Lake Tawakoni, TX - Catfish Capital of Texas
Gotsea

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Posts: 1,122
Reply with quote  #24 
Johnny, it is very difficult to properly diagnose a problem with this engines without  the minimum required tools, diagnose software and a laptop, timing light,  vacuum and fuel pressure gauges, good digital electrical meter, I am not a fan of throwing parts  to a problem hopping it will get solved, to put to rest that theory about the VST needle getting stocked, you can unplug the small hose coming out of the VST top nipple and run your engine if you see fuel gauging out and your engine runs good you go it if not that is not your problem, it could be you are running on 5,  
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1994 24 WA Baha
2008 300 HP DPXSC S/N 05228253
15 1/4 X 19 Mirage Plus 47 MPH top end @ 5,750 RPM
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johnnyv4449

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Posts: 15
Reply with quote  #25 
So I finally got some time to go down to the boat. I still have the fuel/oil mix coming out of the front of the cowling so I am assuming that VST float is stuck.

I ran diagnostics on the injectors and looks like #3 is not firing. I switched the leads to see if it was the wiring or the injector. #3 lead fires #1 injector. #1 lead also did not get the #3 injector to click. Fair to say that #3 is bad?

Now what do I do?

Also probably a dumb question but if I have to take it to a dealer to get this replaced cant run this engine correct? I assumed that without anything being injected Ill scorch the piston. I have a feeling its going to be a long ride on one engine if I cant replace this myself.

Can these be rebuilt?

Johnny
steelhead

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Posts: 3,407
Reply with quote  #26 
Fix the VST or replace it.  Leaking fuel spilling out of the motor is an explosion fire hazard, big bad juju on a boat.

If your injector does not pass a couple ohm meter tests, hot and cold, not worth sending in to professional injector shop.  Replace with new.  You can program in the new injector file into the EMM with your E. Diagnostics software.
10 year old motor with boat fuel system problems, I would sent the other 5 in to a professional injector shop for cleaning and testing.

An injector not injecting enough fuel will cause an over heated combustion chamber resulting in precombustion which breaks pistons and rods.  A direct injected motor injecting too much fuel with a stuck pintle nozzle washes all the oil off the cylinder wall/piston/rings resulting in severe damage.

Please post the results of:
Compression and leakdown tests.
Lift pump and high pressure pump psi tests cranking.
Boat fuel system vacuum test.
Latest Engine Report History page and Engine Snapshot in .pdf file format.  Use a file hosting site and post link to your files.
johnnyv4449

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Posts: 15
Reply with quote  #27 
thank you...ill work on these tests and get them posted. does a new injector automatically come with that file?
olypopper

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Reply with quote  #28 
Quote:
Originally Posted by johnnyv4449
thank you...ill work on these tests and get them posted. does a new injector automatically come with that file?


Only if you buy it from a good dealer like.Barnacle Bills. Online retailers are notorious for not giving the .dat files.

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