• Hi everyone,

    As you all know, Coffee (Dean) passed away a couple of years ago. I am Dean's ex-wife's husband and happen to have spent my career in tech. Over the years, I occasionally helped Dean with various tech issues.

    When he passed, I worked with his kids to gather the necessary credentials to keep this site running. Since then (and for however long they worked with Coffee), Woodschick and Dirtdame have been maintaining the site and covering the costs. Without their hard work and financial support, CafeHusky would have been lost.

    Over the past couple of weeks, I’ve been working to migrate the site to a free cloud compute instance so that Woodschick and Dirtdame no longer have to fund it. At the same time, I’ve updated the site to a current version of XenForo (the discussion software it runs on). The previous version was outdated and no longer supported.

    Unfortunately, the new software version doesn’t support importing the old site’s styles, so for now, you’ll see the XenForo default style. This may change over time.

    Coffee didn’t document the work he did on the site, so I’ve been digging through the old setup to understand how everything was running. There may still be things I’ve missed. One known issue is that email functionality is not yet working on the new site, but I hope to resolve this over time.

    Thanks for your patience and support!

EFI anomoly

Motosportz

Motosportz

CH Sponsor
Staff member
I saw a few other people post about this and something I have noticed on my EFI TXC. If you stop on the trail for a minute and then hit the red button and starter real quick the bike will sputter and act like it has water in the gas. If you shut it off via the red button, then turn it back on and make sure you wait until the pump stops priming it runs perfect again. Not sure what this is but I have started to just kill it with the clutch at stops to avoid this anomaly. Anyone else notice this? My thought is it is not building pressure fully if you don't let the prime cycle finish.

not an issue just a heads up.
 
I would indeed assume the fuel pressure needs to be up to snuff before the bike would run correctly. Are some people just turning on the key and instantly hitting the starter? :confused:



That would be similar to turning on the pet cock in a carbed bike, and expecting it to start right away before the float bowl was filled.
 
Besides the forementioned fuel pump stuff, the ECU has to take a couple of second to set too Kelly
 
I don't think txc's have keyed switches do they? BTW, my 08 is the same on a quick start, has to prime or it won't start normally.
 
Hmm, On EFI bikes in general it is better / needed to let it pressurize and computer cycle before starting. I guess I've had a few too many EFI BMW's over the years................
 
My G450X starts pretty darn quick on a restart and does ok on a fresh morning start up for being fuel injected. The TE's also do well if the key has been left on and you use the kill switch. Haven't played enough with the new TXC FI to see how it's different. If it's like the BMW it has a timed relay to keep things pressurized (30 seconds) and after that it relleases the electronics. However the TXC uses a stationary on/off kill switch where others use just a momentary kill, dunno will look into that a tad further.
 
Don't get me wrong, it is quick, as in a few seconds but if you get in a hurry, hit the on button and stab the starter it might run odd. If you give it the 3-5 seconds it needs to stop priming, it runs perfect. It was just a observation not really an issue. Bike starts and runs great hot or cold. :thumbsup:
 
My te310 does the same thing. I try to wait untill i hear the fuel pump stop priming before i hit the start button.
 
Coffee;70712 said:
I would indeed assume the fuel pressure needs to be up to snuff before the bike would run correctly. Are some people just turning on the key and instantly hitting the starter? :confused:
QUOTE]

I have to admit I have this habit because on my carbed bike, I can do it without any problem. Come to think of it, my fuel injected cbr929 starts fine also that way. But, I'm breaking the habit on the TE and now pretty much all the time I wait until the pump stops priming before lighting it off.

The computer comment is good. I never thought about that. Perhaps it's not so much the fuel pressure but the computer just takes a couple seconds to get sorted. Maybe the 929 computer is just a little faster and that's why it lights right off.
Click to expand...
 
I've seen the same characteristic on my 08 TE450. I figured it was due to low fuel pressure. It could be the ECU starts added more injector time trying to get it to start, but if the pressure rises quickly, it could be causing it to flood the engine.

It would be interesting to look at data logs taken while creating this condition.

It could be that some other EFI bikes hold the fuel pressure (check valve) in the fuel line after the engine shuts off.
 
Prime Volume – (Pick up fully submersed) 70.82ml
Prime Volume – (First sign of low fuel level around pick-up) 38ml
On a flat surface the fuel drops below absolute pick up point with 2612.4ml of fuel in tank after 4587.6ml (approx 60%) has been used
Fully primed pump allows engine to idle for 7 Minutes (tested at 1,750 RPM)
Remaining fuel in tank after “ran out of fuel” 300ml (this is after pump ran dry so the 300ml is dead fuel)

Amount of fuel required to prime pump after “running out” 200ml (added to the remaining 300ml = 500ml from dead empty tank & dry pump)


because it`s not a return to tank system air in the line will lean it out only - not stop it as quickly as a return to tank or externally pressure regulated system, as it`s not as crucial to constant absolute volume after the pump.
I ran it totally dry - the pump was empty & all that was left in the tank was exactly 300ml, you could shake it around & use that up too if you had too.

All tests on a flat surface.

The advantage of a system like this is that it only needs enough fuel to around the pick up intermittently to run the bike, because the pump will give up to 7 minutes (corrected down depending on RPM etc) & that is plenty of time for splashing fuel to be picked up. However, like any bike, don`t let it run that dry, it`s really no different to a carby system & you can extract all but 300ml of fuel, not many are actually that good

Low fuel Light came on with 1900ml remaining in tank, so that`s 700ml after the pick up started drawing air, but again remember this is on a flat surface, so riding would allow fuel surge & keep fuel being picked up and that means it still has 1600ml until it totally runs out, = reserve of 1.6lts
Purely for specs & you can draw your own conclusions, but i`m happy that the system used is capable of running efficiently & makes good use of the allowable volume of fuel without adverse harm on the pump or engine, sure a 100% submersed pump is always the best, so unless you want to cut the tank up & fit a swirl pot or an external can be comfortable that this system is pretty efficient in doing what needs to be done.

Depending on your riding style, gearing & tune, do your mpg & you can work out how long you`ve got after low light comes on. BTW the light is triggered by fuel level, not drop of pressure as someone had asked me once before.
Here are the measured fuel pressure & 8 minute drop also.
 

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Nice info.

How's that Gas Gas treating you or was it a Sherco? When you coming back to the darkside (Husqvarna)?

dags;72396 said:
Prime Volume – (Pick up fully submersed) 70.82ml
Prime Volume – (First sign of low fuel level around pick-up) 38ml
On a flat surface the fuel drops below absolute pick up point with 2612.4ml of fuel in tank after 4587.6ml (approx 60%) has been used
Fully primed pump allows engine to idle for 7 Minutes (tested at 1,750 RPM)
Remaining fuel in tank after “ran out of fuel” 300ml (this is after pump ran dry so the 300ml is dead fuel)

Amount of fuel required to prime pump after “running out” 200ml (added to the remaining 300ml = 500ml from dead empty tank & dry pump)


because it`s not a return to tank system air in the line will lean it out only - not stop it as quickly as a return to tank or externally pressure regulated system, as it`s not as crucial to constant absolute volume after the pump.
I ran it totally dry - the pump was empty & all that was left in the tank was exactly 300ml, you could shake it around & use that up too if you had too.

All tests on a flat surface.

The advantage of a system like this is that it only needs enough fuel to around the pick up intermittently to run the bike, because the pump will give up to 7 minutes (corrected down depending on RPM etc) & that is plenty of time for splashing fuel to be picked up. However, like any bike, don`t let it run that dry, it`s really no different to a carby system & you can extract all but 300ml of fuel, not many are actually that good

Low fuel Light came on with 1900ml remaining in tank, so that`s 700ml after the pick up started drawing air, but again remember this is on a flat surface, so riding would allow fuel surge & keep fuel being picked up and that means it still has 1600ml until it totally runs out, = reserve of 1.6lts
Purely for specs & you can draw your own conclusions, but i`m happy that the system used is capable of running efficiently & makes good use of the allowable volume of fuel without adverse harm on the pump or engine, sure a 100% submersed pump is always the best, so unless you want to cut the tank up & fit a swirl pot or an external can be comfortable that this system is pretty efficient in doing what needs to be done.

Depending on your riding style, gearing & tune, do your mpg & you can work out how long you`ve got after low light comes on. BTW the light is triggered by fuel level, not drop of pressure as someone had asked me once before.
Here are the measured fuel pressure & 8 minute drop also.
Click to expand...
 
the BETA 450RR

NICE

Funny thing is I keep getting pulled back emotionally to Husky, but still not the right time, i'm enjoying riding a well sorted bike that i don't need to work on, it`s got more mileage than my 07 & 08 Husky`s & i haven`t had to repair or diagnose any dramas, (except a dead battery)
i ride it, i wash it, i love it. occassionaly I`ll change the oil

it`s a nice change :thumbsup: visiting the forums it seems not much has changed & the same issues are standing proud, looks like you guys are going gangbusters too - top stuff

I will get another Husky though, maybe :p
 
The only thing that bothered me on my 2008 TE 450 was the pop and die with the crack of the throttle, which didn't happen all the time. I also got used to it and how to avoid it when riding. My suspension was soft and my forks had that initial harshness in the stroke, but soft overall. Other than that, the bike was perfect and really helped me to grow as a rider leaps and bounds above my last bike. Now my 2009 TXC 250 (carb) is just about perfection! I'm not even kidding.

We hope to see you back on a Husky soon!

David

dags;72538 said:
the BETA 450RR

NICE

Funny thing is I keep getting pulled back emotionally to Husky, but still not the right time, i'm enjoying riding a well sorted bike that i don't need to work on, it`s got more mileage than my 07 & 08 Husky`s & i haven`t had to repair or diagnose any dramas, (except a dead battery)
i ride it, i wash it, i love it. occassionaly I`ll change the oil

it`s a nice change :thumbsup: visiting the forums it seems not much has changed & the same issues are standing proud, looks like you guys are going gangbusters too - top stuff

I will get another Husky though, maybe :p
Click to expand...
 
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