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Enduro Engine 4 stroke (including EFI & Exhaust) 4 stroke engine, EFI, and exhaust discussion


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  #21  
Old 06-19-2016, 03:19 PM
Yngvim Yngvim is offline
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We're you able to set the TPS in ECU before you made the changes or after?
+170mV means less air less fuel and I think it will affect the timing as well

EC 250 2001, Fse 450 2004


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  #22  
Old 06-20-2016, 12:26 AM
Tafka Tafka is offline
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Quote:
Originally Posted by Yngvim View Post
We're you able to set the TPS in ECU before you made the changes or after?
+170mV means less air less fuel and I think it will affect the timing as well

EC 250 2001, Fse 450 2004
I made changes to CO-trim before and after i made changes to TPS.
When i had +290mV then i tried changing the CO-trim from +10 to +30 (Originally i had +22). I rode some time with +17 trim and had no problems (maybe only that engine got little bit too hot sometimes).
At the moment i have +170mV(+20 trim) and it rode very good, it had more torque (i got the front wheel off the ground much easily than before). But still the issue that it started to stall little bit too easily and very quick snap on the throttle sometimes stalls it too...higer idle should fix that in my opinion. I set the CO trim to +25 now and hope to test it out tomorrow.
But yeah i should say that +170mV gives more torque but with +290mV engine revd little bit quicker?(at least when listening with ear).
So i'm confused at the moment...i like the low end torque but if that(+170mV) gives too lean mixture then thats not so good either.
I checked the TPS with guzzydiag, and didn't see any dead spots (turned the throttle really slow and watched the TPS angle and voltage).
What else should i check? Replace injector?

Last edited by Tafka; 06-20-2016 at 12:58 AM.
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  #23  
Old 06-20-2016, 02:36 AM
Yngvim Yngvim is offline
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I'm not shoure if it is running lean , wrong timing can cause the engine to run to hot, but you can try any voltage between 170mV and 290mV and find the sweet spot. The lower value is 4.5° opening on the throttle. It doesn't hurt to use injector cleaner.
Hope you will finde the setting you like

EC 250 2001, Fse 450 2004
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  #24  
Old 06-20-2016, 04:10 AM
Tafka Tafka is offline
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Quote:
Originally Posted by Yngvim View Post
I'm not shoure if it is running lean , wrong timing can cause the engine to run to hot, but you can try any voltage between 170mV and 290mV and find the sweet spot. The lower value is 4.5° opening on the throttle. It doesn't hurt to use injector cleaner.
Hope you will finde the setting you like

EC 250 2001, Fse 450 2004
Just to be sure...every time when i adjust TPS, I should reset TPS also?!
Will try to play with the CO trim few days.
Still it's very strange that this stalling started in the middle of the ride....
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  #25  
Old 06-20-2016, 04:22 AM
Yngvim Yngvim is offline
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It should be set at 290mV. All the parameters in the ecu are written according to that. It seems like TPS reset didn't work when you adjusted the throttle body first time and you are compensating for that by changing the TPS value. It should be set at 290mV after that you can make adjustments without TPS reset

EC 250 2001, Fse 450 2004
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  #26  
Old 06-20-2016, 04:43 AM
Tafka Tafka is offline
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Quote:
Originally Posted by Yngvim View Post
It should be set at 290mV. All the parameters in the ecu are written according to that. It seems like TPS reset didn't work when you adjusted the throttle body first time and you are compensating for that by changing the TPS value. It should be set at 290mV after that you can make adjustments without TPS reset

EC 250 2001, Fse 450 2004
Hmm...okay. Will try that. At the moment i have always made TPS reset.
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  #27  
Old 06-20-2016, 06:57 AM
Yngvim Yngvim is offline
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I have not been able to use guzzidiag to set the TPS.

Maybe we're doing it wrong.

Here is a link to some help

http://wildguzzi.com/forum/index.php?topic=69168.0

EC 250 2001, Fse 450 2004
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  #28  
Old 06-20-2016, 07:26 AM
Tafka Tafka is offline
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Quote:
Originally Posted by Yngvim View Post
I have not been able to use guzzidiag to set the TPS.
When i have played with TPS then GuzziDiag shows XX.XX value for TPS angle...when i reset it then it resets it to 6.37 degrees. So i assume that resets the TPS correctly....
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  #29  
Old 06-27-2016, 06:12 AM
Tafka Tafka is offline
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I'm really tired of the problems...took the throttle body off and cleaned it and the injector. Put it back together...adjusted the TPS to +290mV, reset TPS....and it's horrible now. Even when cold it starts to stall and when hot then it doesn't want to idle at all...
I will leave it for a couple of days, because i might screw something up even more when frustrated.
Ordered new injector, coolant sensor and TPS....if changing those doesn't help i'm out of ideas
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  #30  
Old 07-01-2016, 02:17 PM
Leeky Leeky is offline
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Hi gents, sorry to hear some of you are struggling still with your bikes, I hope my post has been a little helpful - if not just use it as a work flow to check off the things that could have an affect.

I've since found mine to be absolutely amazing, after routing out the bad wiring (left as a present by a previous owner) it's dependable and reliable. I changed the regulator and battery recently as I did a quick check on the battery voltage when running and found it to be 18v, I took the opportunity to fit a Yuasa battery and she usually starts first hit on the button now - hot or cold.

I've been racing recently on a 2 stroke KTM, the gasser a bit heavy but great for green lanes with the old man - I might just end up keeping it
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