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Discussion Starter #1
Good day mates I'm new to this forum I have a 2003 mv agusta f4 evo 3 1+1.Here is my problem the bike has been parked up for about three years because I was studying overseas. Recently I've returned home and I took her out of storage. Here is a list of things I've done so far.
New Battery
new Fuel pump and filter (change fuel lines)
cleaned and tested all injectors (they all work)
New iridium spark plus
Cleaned the fuel tank
flushed the cooling system
Disconnected all electrical connection clean and replaced with dielectric grease
Change oil and oil filter
Cleaned air filter, greased over the hub bearings both front and back

The problem however is when I fire her up she fires only on #2 and 3 cylinders I'm getting sparks in all cylinders but I'm only getting fuel in no 2 and 3 injectors number's 1 and 4 no fuel but I'm getting a 12v reading when tested. I have traced the grey/red wire back to the ecu, when earthed and released I'm getting minimum fuel into the cylinder. I'm stomped as to what may be the problem. Is it that I need a new ecu? Or is this an earthing issue. Any help and advice would greatly appreciated.

Cheers
Kurt
 

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#2 and 3 injectors both fire at the same time (as do the spark plugs). #1 and 4 do the same.
You have spark but no injector?
ECU grounds the injector circuit to fire the injectors. Duration of ground (duty cycle) determines fuel mixture.
Battery voltage at both injectors and continuity to ECU on ground path wiring from injectors? Sounds like ECU. Check the pins and sockets on the ECU plug related to those injectors for corrosion or damage.
If you have a Power Commander disconnect it and try again.
 

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Discussion Starter #4
Yes ultrasonic cleaning of injectors was done and they squirt perfectly,pins were checked and cleaned of corrosion and there is continuity through the grey/red wire from the injector to the ecu.The green/red has a 12.6v constant reading and the grey/red wire from the ecu gives a 12v reading once the bike is started.As i stated before if i earth the grey/red wire there is a bit of activity from the injectors once the fuel burns out is back to 2 and 3 cylinders firing.
 

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Then the ECU is not firing #2 & 3.... merc07 is the wiz on 1.6 ECUs
 

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Hi Kurt, I tried to reply to your PM but this shite system doesn't allow me to, on top of not allowing to view any pics still !

Can you email me instead ?
 

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Kurt...just a suggestion but.....
As we all know dielectric grease is an electrical insulator. In pin type connectors you can lose connection as the pin floats in the grease.
I'd be tempted to clean out the injector and or ecu connector with a bit of electrical cleaner to clean out excess grease or WD40 and see what happens.

Good luck !
Joe
 

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?

Kurt...just a suggestion but.....
As we all know dielectric grease is an electrical insulator. In pin type connectors you can lose connection as the pin floats in the grease.
....
Good luck !
Joe
No!

Research it folks

http://www.w8ji.com/dielectric_grease_vs_conductive_grease.htm ....

I use it on every electrical connection and never have problems........and I live 3 blocks

from the Pacific Ocean..... so corrosion is a problem

:popcorn:
 

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I used dielectric grease on my indicator bullet connectors once. They wouldn't work. My electrician buddy flushed the grease off with a bit of well aimed WD40 and abracadabra we have contact. No problem since.

I'd already read the article you clipped in there Noel.

and...

I've read a fair bit technical blurb on this and it's about on par with an oil thread : )

I'd use it on connectors which have a good contact pressure but not on pin contacts as the pin floats in a little coat of grease.

Anyway, it would make sense for the op to ensure that the contact area of pin 22 at the ecu is clean and operational before jumping past what might be a simple solution and messing with what may be a perfectly fine ecu.

Cheerz
Joe
 

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Must be an old 'Curmudgeon', non PC types thing :), before my dad passed away, we worked together to get his old Benz going again, and he'd put a dab of grease (I assume dielectric grease) in every connector on the car. I wasn't going to argue or ask why other than to say that I remember back in the old days cars used to come from the factory with grease on the battery terminals, so I just followed my dad's lead. Car started up, got RWC and we passed it onto his carer.
 

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Grease is a fine anti-corrosive agent, on battery terminals and other connections. Dielectric grease also prevents current leakage between different circuits. It IS an insulator.

HOWEVER, you don't put the grease on battery terminals until they are assembled and tight...and if you put grease on electrical connectors that are not tight enough to displace the grease between the 2 surfaces when assembled then it acts as an insulator.

Joe is spot on...must clean the connector to eliminate the possibility of open circuit caused by grease between contact surfaces before diving off to more complex things.

It's always something simple folks...it's just not always simple to find.
 
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Discussion Starter #13
Nice discussion guys but let's not stray away from the topic.So i'm of the opinion the my ECU is the culprit.Has anyone on the forum had this experience and solved it without having to change the ecu.Or is there a possibility that the ecu can be repaired or can i repair it myself.Just point me in the correct direction.
Thanks guys.
 

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Kurt..Best bet is to contact Adam.. Merc. Who posted earlier in the thread. He's very knowledgeable on your ecu.

Just to eliminate a possibility..check the velocity stack vacuum covers on the left and right side of the bike in case there are any air leaks...
Joe
 

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Please check te electronic connector housing. I had an injector that seemed to be fine but the connector housing was cracked a little bit and caused the injector to be malfunctioning.
 

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This model bike does not throw up "fault codes" on the dash.
ECU's can be repaired not the Eprom's though.
ECU is the same on a few MV models up to about 2005, just the Eprom mapping varies. Some Ducati's use the same 16M ECU's also.
 

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Where abouts are you ?

You may be able to borrow the diagnostic tools or swap out the ecu.
As Dons said, you can also use a ducati one....just use your eprom.
 

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I have a Ducati ECU in my EVO 3 F4 which had a similare issue.
NOw, I'd like to find someone to repair the original ECU.
 
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