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Old 16 July 2014, 03:11   #11
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I thought if you changed the injectors/EMM then the EMM had to be programmed for them.

What year is it OMC or BRP?
From what you have said I would still take the plugs out to confirm which cylinder is causing the problem.
Rule of thumb: -
If it is electrical the plug is likely to be wet/black
If it is fuel/injector plug is likely to be dry/clean

With the EMM not having any fault codes makes me think all the systems are working with in parameters which leaves a more basic fault such as faulty: -plug, coil, lead, low tension wire to the coil ( I was going to say check the earths but you have done), restricted or gunged fuel feed to or the injector.

I have more suggestions but PM me and I will phone you it will be easier.
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Old 16 July 2014, 09:35   #12
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Hi

Thanks for all the help so far, I've sent you a PM.

Cheers
Rob
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Old 16 July 2014, 13:19   #13
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If the injector co-efficients haven't been programmed into the emm, it can have fatal results on the powerhead, that issue needs addressing asap. It won't help the rough running issue either, to properly diagnose the problem, you need to sort this out first, it could well BE the problem. After that's sorted, if the problem persists, you need to start with basics, fuel; is air being drawn into the system? A piece of clear hose inserted after the lift pump will enable you to see any bubbles in the fuel. Lift pump: is the diaphragm knackered, does the problem go away if you pump the primer bulb with the engine running. Remove the hoses from the crankcase to the lift pump & pump the primer bulb, do you get fuel out of the hoses to the crankcase, if so, pump is u/s. Next step is to check the pressure on the HP side to the injectors, you need a gauge for this, there is a port on the HP side of the pump to check the pressure. Could be a dealer job, this bit. After that you need to start looking at injectors/electrics/coils etc. Just a thought, if the injectors have been swapped, just make sure that they have been connected to the correct leads & not cross connected.
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Old 16 July 2014, 16:18   #14
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Ok I'm getting really quite confused with this injector information.

There is a QR code on my injectors next to the serial number and part number. If I scan this QR code it contains injector coefficient information and a serial number. Surprise surprise the coefficient information and serial number in the QR code on the injector match the same information stored in the EMM! But that is different to the serial number actually written on the injector.

Now I'm really confused!

Is there any chance someone with a 2002-2004 ficht 150 engine could please have a look for a part number on there injectors as well as I just want to double check that mine are the correct ones? BRP say the part number should be 5005195 but my injectors p/n on them is 5001156.

Cheers
Rob
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Old 17 July 2014, 12:25   #15
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I could be talking bollix here, but I'm not aware that FICHT injectors had QR codes on them. Is it printed on the body of the injector or on a separate label attached to the injector?


.....sh1t happens.......
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Old 17 July 2014, 14:12   #16
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Here's a photo of an injector on mine, sorry it's upside down.
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Old 17 July 2014, 19:46   #17
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Thanks Andy, that's exactly the same as mine and same part no.

Mike at South Coast Marine also confirmed today that that p/n injector is fine in the ficht engine.

Really odd that the s/n in the QR code doesn't match the s/n on the injector but apparently it's the one in the QR code that matters and the coefficients and they match what's in my EMM so they don't all need to be updated.

This all brings me round to one last thing to check to confirm if it is a faulty injector which is looking likely at the moment.

Is there any point in running some injector cleaner through with the fuel in these engines?

Cheers
Rob
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Old 25 July 2014, 17:53   #18
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Have you got on top of the problem yet Rob?
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Old 25 July 2014, 18:04   #19
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Been on hols for a week mate so not had chance to do anything else yet.

I've managed to confirm that the QR code info is correct and the EMM is programmed with the correct injector details. So it's looking like a sticky fuel injector at the moment although I've got to do another test when I get back to confirm this then arrange to get a new one fitted.

I know this won't be cheap but I've reached the point where I really hope I can prove this is the problem and get it swapped out so I can use the boat.

I'll update this thread as soon as I know more.

Cheers
Rob
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Old 07 August 2014, 08:54   #20
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Well hopefully this is now resolved!

Last weekend I had chance to swap over the suspected faulty injector with the one next to it to see if the problem moved. However before I actually swapped them we thought we'd try and fire the injector without it being in the cylinder head to see if the spray/nozle looked ok.

This is where we discovered that the actual injector nozle isn't sealed into the injector unless it's clamped into the cylinder head as fuel went everywhere when the injector tried to fire but came from the sides rather than the tip of the nozle.

We then tried to put the injector back into the cylinder head and it wouldn't seal with fuel leaking out when the injector fired.

The cylinder head itself had loads of salt deposits on it as well so what we did was basically clean everything up. Cleaned all of the salt and crud off the cylinder head until the injector slid into place easily.

Thinking the injector was probably knackered now anyway we threw caution to the wind and soaked the injector nozle (which we removed from the injector body when it wouldn't seal) overnight in redex injector cleaner. We also cleaned the injector body of any salt deposits and put some redex into the end of the injector where the nozle fits. We didn't completely strip the injector core out as we didn't have replacement o rings so figured we'd hope the rest was ok and try and clean the tip.

Two good sources of info on the injectors were these two web pages.

Ficht fuel Injector - Rusty Discharge?? - Page 4



After a 24 hour soak we re-assembled the injector, bolted it back into the head and fired her up. She ticked over a dream with no missfire at all, revved to around 1500rpm and still fine.

So yesterday we took her out for a test with some redex in the fuel just to give all the injectors a bit of a clean on a local water skiing lake, she ran no problems or missfires for around an hour so hopefully we've cured it.

Many thanks to everyone who's given advice on here and also Ian at Liverpool powerboats and Mike + Paul at South coast Marine who have all helped find the problem.

I'm hoping we can make the next ribnet cruise in our own boat!

Cheers
Rob
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