• 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 The previous version was outdated and no longer supported.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!

Fuel pressure adjust on 09 EFI 510?

B

bbcmat

Husqvarna
A Class
I have not had the pump out of the tank on my 09 TE510 - is there an external pressure adjustment and would this be a non-computer technique to trim the fuel curve with the Power Up Kit installed? Mine runs like a champ it just needs a tweak to pull out some fuel to crisp it up.

From what I can read on the software - the main FCU does not have active fuel pressure feedback - so a drop in the pressure may equal drop in injected fuel. (no 02 sensor)

Your thoughts?

MAT
 
bbcmat;34485 said:
I have not had the pump out of the tank on my 09 TE510 - is there an external pressure adjustment and would this be a non-computer technique to trim the fuel curve with the Power Up Kit installed? Mine runs like a champ it just needs a tweak to pull out some fuel to crisp it up.

From what I can read on the software - the main FCU does not have active fuel pressure feedback - so a drop in the pressure may equal drop in injected fuel. (no 02 sensor)

Your thoughts?

MAT
Click to expand...

It does measure ratio.
 
Please explain how it is measuring fuel ratio without exhaust 02 feedback. (Power up kit installed)

1- AIR TEMPERATURE (Air temperature in the intake manifold)
2- COOLANT TEMPERATURE (Engine coolant temperature)
3- ATMOSPHERIC PRESSURE (Atmospheric pressure in the intake manifold in the current position and altitude)
4- THROTTLE POSITION
6- O2 SENSOR (Senses rich or lean combustion mixture)
7- BATTERY SENSOR (Battery voltage)
8- SENSORS SOURCE (It supplies energy to the sensors)
9- GEARSHIFT POSITION (Current gear position)
10- INJECTOR (Pulse width of fuel injector)
11- IGNITION COIL (It accumulates energy and discharges said energy to spark plug)
12- O2 HEATER (It warms the O2 sensor to a temperature suitable for the sensor to give stable output)




Does anyone know if there is a adjustment for the pump output pressure and/or what the spec pressure is?

MAT
 
I looked in the service manual and there is no mention of the output pressure or any way to test it. The pump "seems" to be the same as the Sherco's had. They do sell some small parts to the pump that Husky does not. You might contact them and see if they have any info that can help you. A poster here did get a part he needed so maybe they'll pass on some information.


ShercoUSA





work 1-800-607-8742

work info@shercousa.com


Note: Fuel injection parts that Husky does not offer.
 
bbcmat;34780 said:
Please explain how it is measuring fuel ratio without exhaust 02 feedback. (Power up kit installed)

1- AIR TEMPERATURE (Air temperature in the intake manifold)
2- COOLANT TEMPERATURE (Engine coolant temperature)
3- ATMOSPHERIC PRESSURE (Atmospheric pressure in the intake manifold in the current position and altitude)
4- THROTTLE POSITION
6- O2 SENSOR (Senses rich or lean combustion mixture)
7- BATTERY SENSOR (Battery voltage)
8- SENSORS SOURCE (It supplies energy to the sensors)
9- GEARSHIFT POSITION (Current gear position)
10- INJECTOR (Pulse width of fuel injector)
11- IGNITION COIL (It accumulates energy and discharges said energy to spark plug)
12- O2 HEATER (It warms the O2 sensor to a temperature suitable for the sensor to give stable output)




Does anyone know if there is a adjustment for the pump output pressure and/or what the spec pressure is?

MAT
Click to expand...

Mat,

The system doesn't measure A/F ratio without the O2 sensor, as you've correctly identified it can't. There is no adjustment for the fuel pressure that I know of, certainly nothing in the iBeat software anyway and as gl says nothing in the manual.

If you want to richen things up then iBeat 2 will allow you to do this across the whole rev range.

Dave
 
bbcmat,

Your correct about the EFI system not knowing exactly how much fuel is being delivered without the O2 sensor. The variation of fuel pressure and injector performance between bike is likely what requires each bike to have the open-loop fuel map adjusted for optimum performance. Currently the best way to do this is with the Dynojet PC.

It looks like the factory adjusts the FB1 (map offset) setting so that when the O2 is providing feedback during idle, the activity FB ( real-time trim) displayed value is 100% which means that the map is correct for 14.7:1 AFR. This why the FB1 is not the same on new bikes. It looks like the typical range is from 97 to 103. All of this is really for emissions requirement and not "fun factor".
 
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