07 FSR 450 injector problem?

G

GavGav

New member
Anyone had any problems with the injector not working?

Occasionally my bike will just stop.

Fuel pump is working. (can hear it)

Took injector out and held the fuel line on it while turning engine over with the start button. No squirts of fuel...

Removed injector and connected a 9v battery to the terminals and can hear it "Click, Click".

Put bike back together and all is great.

It did it again about 2 hours later. this time I just disconected the electrical conector and reconected and disconected a few time as I thought it may have just been a connection problem.

But still no go.

So I connected the 9v again and got the click click.

Put it all back together and off she goes.

Can fuel contamination stop it working??

Do injectors sometimes fail??

Love the bike but his is getting to be a problem, especially on the trails.
 
Last edited:
It could be the crank sensor.
This trigers a pulse to the ECU to give spark and trigers the injector.
Sometimes when they get hot they can do this.
Some days they can be ok for 100miles and other times they just play up.

What type of off switch do you have is it a key or just the kill button?
some times the kill button can play up.

When it stops working check the spark and see if it has a constant spark,
if not I would replace the Crank sensor.
 
Sandman said:
It could be the crank sensor.
This trigers a pulse to the ECU to give spark and trigers the injector.
Sometimes when they get hot they can do this.
Some days they can be ok for 100miles and other times they just play up.

What type of off switch do you have is it a key or just the kill button?
some times the kill button can play up.

When it stops working check the spark and see if it has a constant spark,
if not I would replace the Crank sensor.
Click to expand...

You could be right there.
It was a bit hot today and it was after a lengthy ridge climb.
I will put it on the list for the dealer.

It is just a pain because it is intermittent.

Cheers again.
 
Check the wiring for the crank sensor, They sometimes have a problem if the wiring is twisted and too close to header exhaust.
 
I have no FSE/FSR experience, but a lot with a Cannondale. If there is a mechanical relay that powers the ECU, I would look there. Vibration would break the contacts and cause the ECU power to drop out on the 'Dales. Varied with terrain and engine speed (vibration). If you continue to have problems after looking at everything else, try to vibration isolate the relay somehow. I ended up rewiring a lot of the Cannondale system and installed solid state relays, but its a major job.
 
Relay In Air Box

Have You Replaced Relay In Air Box? I Had Same Problem (or Similar Prob.) It Was The Relay In The Air Box. Went To Napa And Picked Up Part #ar614 And It Worked Perfect. Napa One Was Sealed Unit And The Stk One Was Not. Causing Dirt To Get In The Contact. Easy Fix, If That Is Your Problem
 
relay switch

Ronald is on the right track I think....when I was in Spain I was told by the head engineer that the 06-07 relay switch that is located under the seat behind the airbox loses its contact.

The fix was to remove cap from relay, clean contact thoroughly and when replacing cap seal it with silicone. Or replace the whole switch works eassier.

The 08 will have a sealed relay switch.
 
Thanks for all your replies guys.
But I am unsure if it could be the fuel pump relay.

The pump was working when I tested the injector. I could hear it, but the injector was not squirting.

Unfortunately I have had no time to check things out since I last rode it, haven't even cleaned it yet!

I will check out some of the recommendations re crank sensor on the weekend.

I will keep you informed..
Cheers guys.
 
Last edited:
Update...

I contacted Solo imports (Australian distributor)
He agreed that it sounded like there was a problem with the injector.


I emailed them after work, John called me at 10am the next day to discuss the issue!!
I tell you what, great service. (Thanks John)

So sending him the possible faulty injector for them to test/replace.
He said they have only had 1 or 2 faulty.

Gav
 
FSR 450 injector

Just before Xmas 07 my 07 450FSR (uk model) started to have problems. It would start from cold but once warmed up it would stall when I closed the throttle. Getting it started again was a nightmare and once restarted it ran rough and wouldn't run with small throttle openings. I couldn't work out what was going on, so I took it back to the uk importers at Buxton. Kev, the mechanic their tried sensors, a new plug and a few other things but eventually fixed it by replacing the injector. He thought that the injector was sticking at wide open.

He said that he hadn't seen it be a problem in the uk on the four stroke before mine, but I don't think they import/sell very many as I have never come across another one whilst out on the trail or taking part in a rally.

I hope yours gets fixed.
 
Update 2

So, I got the replacement injector from solo imports.
Nice and quick I might add. :)

Installed it and went for a 100Km ride around the sandy tracks here.

Had no problems at all with the new injector.
Actually, I think the bike had a bit more poke, but that might be psychosomatic?

So hopefully that was the problem and not a intermittent crank sensor....

We will have to wait and see a bit longer..

Gav.
 
Update 3

Definitely fixed.
Been on a few long rides with no problems.

Just need better arm strength to hold onto the bike!

Thanks again to Solo Imports Australia!
 
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