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-   -   Adjusting the Fuel Injection (http://www.gasgasrider.org/forum/showthread.php?t=2238)

sanderjavant 02-16-2008 09:33 AM

Adjusting the Fuel Injection
 
I have a 05 450 FSE and would like to adjust the FI.

I want to see if it will help two issues.

1. It seems to be running a little rich.
2. It dies periodically when I get back on the gas from off throttle.

What are the specs and what tool or tools do I need?

Thanks for any information.

bergerhag 02-16-2008 11:41 AM

You need at least this: http://www.technoresearch.com/Produc...DSTS-Motorbike

INABIL 04-07-2008 05:05 PM

Bergerhag

If I order the Standard for $195. and the USB adaptor for $45. I'll be able to program my fuel injection or adjust a couple of things.

bergerhag 04-08-2008 01:08 AM

In fact I have not laid hands on that software myself, but I don't think there is much more you can adjust except the overall fuel trim. Readouts from sensors, and some error indications is available, and you can reset the Throttle Position Sensor if you have had the sensor removed for some reason.

Let me ask a few mates and I'll get back here.

mike989 04-08-2008 08:59 AM

Quote:

Originally Posted by INABIL (Post 15572)
Bergerhag

If I order the Standard for $195. and the USB adaptor for $45. I'll be able to program my fuel injection or adjust a couple of things.


Yes, you can adjust the trim, and check all the FI componets.

Mike.

Tom Zelko 04-08-2008 10:27 AM

fuel injector adj.
 
I bought all that stuff from techno research and all it does is tell me that things are ok when they are not. We adjusted the thing by ear and it ran just a little lean then quite running again. I have owned 8 GasGas's and have to say my 05 450 has given me more troubles than it is worth.

rpduc 04-08-2008 10:42 AM

I don't know anything about the specific EFI that GG uses, but I'll bring this up as I haven't seen it come up in discussions related to EFI on dirt bikes. Not that I've been all that much attention since I have a 2 smoker...

Quote:

I'll be able to program my fuel injection or adjust a couple of things.
If the EFI is like my Duc the ECU is not reprogrammable or remappable. To actually alter the fuel air map you'd need an add on module like Powercommander or a replacement ECU. Maybe the dirt bike ecus are different but talk of "trim only" sounds very familiar. I think "trim" means to push the overall map richer or leaner, perhaps using some graduated scheme, but it does not allow for specific edits to the air fuel tables and that's really where the "meat" is on EFI systems. There are endless discussions about difficulties tuning EFI on various road bike boards.

The Technoresearch software will allow you to make whatever adjustments are possible with the stock configuration but again if it's anything like the DUC EFI trim adjustments may be insufficient if you make any significant changes to breathing like opening the exhaust or airbox mods.

coolum74 04-09-2008 04:13 AM

Efi
 
Hey All,

A long winded story but when I first bought my new 06FSE450 it ran like an absolute pig during the run in period and i thought i had bought a lemon. when i did the first service @ 200klm (inc plug change and oil) I found a white transite plate in the air box behind the air filter that restricted the air flow down to approx 40mm hole. I rang the dealer and was told the bike was running lean on the pre delivery and the efi was adjusted to suit. Now they are telling me not to worry it will be ok. Where do I stand.. Now it is running awesome I love my Gasser and am proud to be a part of this niche crew...Adam

Sandman 04-09-2008 06:13 AM

The VDSTS from Techno is a diagnostic tool and trim adjustment tool.
You still need some mecanical know how because it is only checking electrical values and not mechanical problems.

With the trim adjustment, the only way to get it correct is to use a C/O meter. Setting your trim to 45 or 35 or what ever will not work and one bike is differant than another.You may get it close but you wont get it correct.
Some bikes could be at 5 and others at 50 to get the correct c/o.
The best place to check the C/O is at the header pipe. At between 80 and 85deg C and the reading should be 3.5 to 4%.

Adjusting the TPS will reset it to the ECU but if the throttle butterfly has been altered the VDSTS will not reset the butterfly adjustment. Do not adjust the stop screw at the back of the throttle body as this will put the readings out and the bike will run rough.

The Gas Gas EFI is simple and the biggest probblem is Gas Gas did not give dealers enough info on it, this is the same for most euro bikes.

I get told all the time that Gas Gas or Serco or Husky have fuel injection problems but 90% of the time it is not the problem of the bike but who is working on it and that's because they can not get any info from the manufacturers.

I have been working on EFI bikes for 30 years and Gas Gas for 6 years and the Gas Gas is a simple system, it just needs the Spanish to give out more info so people can understand it.
Get yourself a C/O meter or try and ask your car mechanic if you can use his.

The new 2008 Gas Gas EFI is great and needs no adjustment due to now having a MAP sensor. No C/O adjustment and you can adjust the idle but the problem will be that Gas Gas will not be able to supply information so mechanics that know nothing about it will knock it and say its unreliable.

If you dont think i am correct in what I am telling you just ring Techo and they will explain it to you or I would sugest to e-mail the factory and tell them to get a work shop manual that has everything in it, last time I looked at a Gas Gas manual it had about as much info as a sheet of toilet paper.:)

iancp5 02-27-2009 02:41 AM

Quote:

Originally Posted by Sandman (Post 15629)
I would sugest to e-mail the factory and tell them to get a work shop manual that has everything in it, last time I looked at a Gas Gas manual it had about as much info as a sheet of toilet paper.:)

I'd say it was less useful.


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