fuel injector question

[blakduc1]

If a bike has been sitting a while and injectors have stuck closed, is there a way to get them to un-stick and work again without taking them out? Bike has spark to the plugs and will start if a little gas is squirted into the cylinder through plug hole. But then immediately dies. So it seems to me the injectors could be stuck.

If plugs are removed and engine rotated with starter, so there is no compression, would that work the injectors and possibly free them?

In case they are bad, does anyone have the aftermarket alternative injector to replace them with? How about fuel pressure regulators? Do they ever go bad, and if so, is there an alternate one to get from parts store?

Thanks,
dp

[Laddie]

...both injectors stuck???
Me thinks very unlikely...
if the bike was running OK when you stopped it you need to keep this in mind with anything you do to get it going. Unless you have rats or mice (which chew wires) if it was working before it should be OK now.

A common problem with longer term storage is water in the fuel.
I don't know how long you let the bike sit or the relative humidity where you are - is it possible that the fuel has got condensation / water in it? The water will collect at the bottom of the tank - so it is drawn into the fuel system first. Usually the fuel lines will have some fuel left in them so the bike will commonly start THEN die.
If you do see water in the fuel it can be dispersed with isopropyl alcohol (or methylated spirits). You need to drain & flush the tank.

some easy tests:
turn the key on and listen for the fuel pump.
no pump = no go.

next, I'd be inclined to test fuel pressure is "there" (pinch the fuel line outlet near the tank and make sure pressure is felt).
I had a fuel hose INSIDE the tank blow. No pressure = no go.

It doesn't need 3 bar pressure to run but it does need 3 bar to run WELL. The pump will pressurize the line - make sure the line pressure does not drop off too quickly when the pump stops - this would indicate a hole in the line.

The hoses are supposed to be chemical resistant but some new fuels are pretty corrosive on the elastomers...

If you have reasonable fuel pressure then you need to test the fuel injector actuation.

electrically test the injectors are getting power
you could do this at the ECU but would be better at the injector
I think it's highly unlikely BOTH injectors would fail electrically


if you have got this far you might as well just pull them out and see if they work.
sorry - I don't have a method to un-plug the injectors if they are gummed up and will not flow at all.

my money is on the water in the fuel.

[ducbertus]

probably the needles are stuck due to gumming.
I had the same problem on a 888 SP3 which hadn't been running for a few years.
I took out the injectors. connected them to a compressor (6 bar) equipped with lubricate unit. I put injector cleaner fluid in the bowl instead of oil. To open the needles I connected the battery.
Instand solution! and you can judge the spray of the injector or it is working properly.

Ducbertus

[blakduc1]

Laddie,

I know the fuel pump and tank, etc. is fine as I pulled it right off the other 907 which was running when I parked it. That way I knew I would eliminate all that stuff as being a problem. And I just did the valves so they should be good. I suspect the injectors are both stuck as it sat quite a while. But I do not know--- could be something else. I know it cranks if I put fuel in the cylinders, then dies.

I was hoping there is a way to jar the injectors loose and get them going without taking them out.......

Guess i will have to however.

Thanks
dp

[Stingray230SX]

Hey Blackduc, my 907 sat for 6 years,and the tank was rusted completely and had to be cleaned out and a couple of pinholes welded up and then sealed .

my injectors however were not stuck.in fact as soon as i completed the tank overhaul , and put the exhaust on, she fired right up.made my dad and myself grin fron ear to ear after that month of slowly putting her back together from her long sleep.

doug hunt

[blakduc1]

Well maybe the fuel pressure regulator could be gummed up? Anyway I took the air box off and took the fuel lines off and blew through them. But I cannot seem to get the injectors off. Took two screws loose in top and took lines and clip rings off with little aluminum caps but injector seems to hold on and not pull out. Do I need to take something else loose? Might as well check them while I am this close....... can't find any instructions anywhere on how to remove and clean the injectors......help....
dp

[blakduc1]

OK---- no one seems interested in discussing these injectors yet. Hopefully that will change.

I did get them out and took them to a local performance garage where a guy hooked them up to a car and we tried to see if they were "clicking" . They did not. We tapped them. They did not click. Then we hooked a battery to them in very short "taps" of the hot wire. No click. Sprayed with penetrating oil and will try again. I have heard that some folks have gotten them to work again after soaking them.

Also, found that Borg Warner injector no. 27031 in Ford Tarus looks very much like the Weber ones from the 907. However the tip looks a little different and I wonder how much difference that would make if it fits physically and the wiring plug clips in (looks like it will). I have not priced the Weber ones yet but I expect them to be high$. The BW ones are about $60 each, and there are some cross reference ones cheaper than that.

Does anyone have any knowledge/ experience/ expertise along these lines?? Know of any substitutes that work?

Need help.... blakduc No.1 must breathe and run again!!
dp

[Tamburinifan]

OK---- no one seems interested in discussing these injectors yet. Hopefully that will change.

I sure am. And thx f sharing.

Gonna doublecheck my FI tomorrow, getting a second Mathesis opinion/check on my whole IE circuit.

Then new chip.

If the 3k RPM stutter still exists, then I will check injectors.

[/list]

[Stingray230SX]

i checked the ducati interchangability list, see it here: http://web.archive.org/web/200411180923 ... /parts.htm

but no info on the 907's fuel injectors

hope you can find what you need

doug hunt

[Tamburinifan]

Think injectors name is IAW03.
If you have the spare part number I try and find it in my
Marelli injection system overview.

[cagiva905]

The injectors in the 907ie are Marelli IW-031 (green). Flow = 270 cc/min.

As an alternative you could try the IW-025 (yellow). Flow = 268 cc/min.
These are used in lots of cars, like Ford Escort Cosworth etc.

Michiel

[blakduc1]

Thanks Guys!!
This helps.
I am going to a couple of Duc shops today and see what else I can find out. They are the green 031 model indeed.

I still have not gotten them to fire with leads from a battery. No clicking sound I can detect. Used penetrating oil and brake cleaner spray. Tapped them. Pushed gently on the nozzle end thinghy. They still sleep.

Hate to buy new ones but I may have to.

dp

[Finnpaso]

The injectors in the 907ie are Marelli IW-031 (green). Flow = 270 cc/min.

As an alternative you could try the IW-025 (yellow). Flow = 268 cc/min.
These are used in lots of cars, like Ford Escort Cosworth etc.

Michiel

... and Gagiva 900 Elephant GT use red ones. What is flow of those red ones????

[cagiva905]

A lot less, 190 cc/min. Hence my search for 907 injectors a while back since I'm going to upgrade my Elefant to 900SS cams.
The Elefant injectors (IW-042) are no use for 907ie.

Michiel

[Finnpaso]

So, i have one red injector for sale then(from Elephant), if i cant use it in my 907, or in other over 900cc Ducati. IF i remember well, PERKELE! Too old already... :funny: