Purging Old Fuel In A 9Er?

[azza68]

G'day All,

 

I left the fuel in my 9er too long, how do I purge the fuel rail? Do I simply remove the return hose and cycle the key, or is there more to it?

 

Cheers

[MickC]

Fresh fuel in tank and let the pump flush it through,only a small amount of fuel in the rail might not bother to disconect it.

[azza68]

Fresh fuel in tank and let the pump flush it through,only a small amount of fuel in the rail might not bother to disconect it.

 

I have tried that, but I'm still getting pongy old fuel out of the injectors; I would have thought the fuel would flush through but, perhaps the return only flows when the pressure valve lifts. Dunno.

 

Definitely got spark; it'll fire with the throat full of "Start-Ya-Bastard" sprayed in.

[MickC]

Would have thought with the starter spay when it starts It would keep going with the fresh fuel going through.

[azza68]

Turns out there's no fuel pressure on the rail, at all; nothing coming out of the pump.  :punishment:

 

So either the pump/pick-up is cactus or there's no current/voltage going to the pump. 

 

Metering time.

 

Such fun.

[fixitsan]

There's a relay under the tank, on my 9er it's mounted on the left of the crossbrace near where the rear of the tank mounts. There's a few relays and electric devices there. The one most on the left has a heavy red cable going to the terminals, this can fail, there's a few reports that it breaks at the terminal inside the sheath, as did mine

 

The bike would power up but the fuel pump didn't start, maybe it's as simple as that for you too

 

I hadn't used my bike for 4 months, and it was fine when I parked it up, but over winter the corrosion ate away at what must have been the last few strands of copper, and then it died when I tried to run it next time.

This post was last modified: 24-10-2023, 03:21 PM by fixitsan.

[MArk2]

Same as fixitsan But i now have another fuel pump  :blush2:

[Catteeclan]

Changed a fuel pump on a gsxr last year that had been sitting for 9 months. No noise when the ign was switched on and then checked for voltage.

Proper rusty mess when we got it out.

[azza68]

Looks like it might be the fuel pump; it's blowing the 10 Amp fuse (under the seat). It's unlikely the relay, unless it's totally melted down.

 

I've had to put it aside for another day; as I ran out of fuses.

 

I'll try it again tomorrow with the fuel pump unplugged. If it doesn't blow the fuse again, the pump is at fault. The ECU will tell me if the relay is working; there's a DIAG mode voltage test for the fuel system (Code 09), the ECU reads after the relay.

 

Thanks for your help gents.

[azza68]

It's the pump.  :punishment:

 

I have this job ahead of me... Linkydink

[Catteeclan]

It's the pump.  :punishment:

 

I have this job ahead of me... Linkydink

 Gonna see more of this with water in the fuel.

[azza68]

 Gonna see more of this with water in the fuel.

 

I've stripped the tank and am trying to recover the pump assembly. The pump and filter sock appear to be toast; they're so clogged that no end of soaking is helping much. 

 

I've found that throttle body (slash carb) cleaner is best to remove the residue left by the fuel, and strong vinegar is good for the rust.

 

The amount of solid crud in the tank was amazing, even though the metal was only lightly surface rusted. Trouble is it's a diabolical combination; because the residue holds the rust in scaley clumps and protects it from the acid/vinegar. You've got to cut through the waxy part before you can get at the rust.

 

Yamaha quoted over One Thousand Aussie doll hairs for a new pump assembly; no parts are available as OEM, aftermarket only for parts. One fifth to one sixth the value of the bike in todays market. I can get a new pump for 200-230.

[Catteeclan]

There's a few used pumps on eBay for under £100, postage might be a prob for you.

[azza68]

There's a few used pumps on eBay for under £100, postage might be a prob for you.

 

That's much the ballpark I'm in already; the exchange rate is nigh 241... $2 for £1.  :isurrender:

 

If nothing, the remote island tax means I get local buyer protection. :drinks: (That's my two heads having a tipple.)

 

Thankfully the pumps got used in many bikes of the same era, dunno about the filter socks though... yet (was a public holiday here today).

[leehenty]

Quantum fuel do a replacement



https://www.highflowfuel.com/qfs-oem-rep...907-11-00/

[azza68]

Quantum fuel do a replacement



https://www.highflowfuel.com/qfs-oem-rep...907-11-00/

 

Thanks Lee,

 

I went to the local stealership and ordered what they use, it was a Quantum kit (just as you linked). It came with a pump (of course) an assortment of filters, one of which more or less fits, and a seal... and some other pieces not relevant to the TDM. A universal kit for dozens of bikes. I now have a 3 inch piece of hose, two hose clamps, and 3 useless filer socks... buggered if I know what use they'll be.

 

So the tank's back together and, if I'm lucky, tomorrow it'll be back on the bike and running. Fingers and toes crossed there's no other issues.

[azza68]

Now it runs on one cylinder... looks like I might be up for injectors too.  :punishment: