Could be a ECU problem?

[rostwor]

I think I could have problem with ECU.
(sorry for my english, it will be difficult to translate but I will try)
The engine couldn't hold RPM. It could be a problem with ignition, because when you hold throttle in one position, the RPM are waving. The ignition could be in wrog time and sometimes you have less power, and after you get boost.
When the engine is cold, between 2500-3500rpm I get "back ignition"
You can check my dyno graph and see it isn't smooth.

http://img519.imageshack.us/img519/6997/wykreszkoa.jpg

http://img693.imageshack.us/img693/5969/wykreszwau.jpg

I will write also in polish so maybe some guy could help me, or just translate it.

Wydaje mi się, że może być to problem z ECU. Silnik nie trzyma równych obrotów. Na zimnym silniku pomiędzy 2500-3500 obr/min łapie cowkę i słychac wtedy mocne uderzenie. Przy trzymaniu równo manetki, czuć, ze obroty falują. Czasami jest tak, jak by tracił zapłon i jest utrata mocy, po czym dostaje mocniejszego kopa, zwłaszcza przy jeździe przy małych prędkościach na 1 lub 2 (np przy jeździe w korku).

Maybe you know the answerwhat could be a problem? Should I change ECU. My TLS is french version from 2000 but I unblocked the power.

[Six5]

Re: Could be a ECU problem?

Your English is fine. You do better than the typical American...


This is the Google translation of your Polish post:

It seems to me that it can be a problem with the ECU. The engine does not hold an equal rotation. On a cold engine between 2500-3500 rpm, and fixed base grabs hear when a powerful strike. In keeping equally shifters feel, with turnover of heaving. Sometimes it is like to lose the ignition and is loss of power, and gets a more powerful punch, especially when driving at low speed for 1 or 2 (eg when driving in traffic).

[Six5]

Re: Could be a ECU problem?

You should take the time to set the Throttle Position Sensor (TPS) and Synchronize the Throttle Bodies (TB) before you spend too much time looking at the ECU. These engines are known for rough running in the low RPMs when Fuel Injection system is not adjusted right. Also, if you have aftermarket exhaust or intake filter the system will need to be adjusted for those changes.

[Six5]

Re: Could be a ECU problem?

Google translation of the above:

Należy poświęcić trochę czasu, aby ustawić czujnik położenia przepustnicy (TPS) i zsynchronizować Throttle wyborcze (TB) przed spędzają zbyt dużo czasu patrząc na ECU. Silniki te znane są z nierówną pracę w niskich obrotów na minutę, gdy system wtryskowy nie jest dostosowane prawo. Ponadto, jeśli masz wtórnym spalin lub zanieczyszczenia filtra systemu będą musiały być dostosowane do tych zmian.

[rostwor]

Re: Could be a ECU problem?

Six5, thanks
Yes, I have Viper carbon exhaust, but when I gave my bike for a dyno run, they make some changes (you can see it on graph). They also cleaned injector.
Last time I also had a full engine service, because one of very good mechanic told me that I have to replace crank bearing because they are going down. I replaced them and camshaft chain.

Should I gave one more time to service or set TPS and TB are easy to make it by myself?

[Steve TLS]

Re: Could be a ECU problem?

ECU is probably fine. Usually they will work or they won't - it won't mysteriously change mapping by itself. Something external might though - i.e be temperature affected.

[Octofinger]

Re: Could be a ECU problem?

Agree on the TB synchonization and TPS setting.

If it's been backfiring through the intake, verify that the intake rubber boots are properly set so you don't get air sucked in there.

[The Ring-In]

Re: Could be a ECU problem?

big red just encountered a problem that was traced to a tps which was faulty. not failed but noisy I guess.

It caused problems at rev intervals.

[rostwor]

Re: Could be a ECU problem?

If it's been backfiring through the intake, verify that the intake rubber boots are properly set so you don't get air sucked in there.

I have change this rubber boots because it was damaged, but it won't help.
I will give my bike to set all this things which you are talking about. I hope that finaly my TLS will work fine, because I had a problem with a frame, so I had to replace rear shock absorber into bitubo, I have change crank bearings because mechanic told me that strange noise from the engine could be a reason of used bearings (but they were fine!!) and now I had this problem...
I don't know if I don't have luck with my bikes, but I hope next season i won't have any problem with my bike...

[rufer]

Re: Could be a ECU problem?

I'd check for vacuum leaks. If you have vacuum leaks, the engine won't idle properly and won't hold RPM until about 3000 rpm.

If you had the engine apart, also double-check that you mounted the cams correctly and not one tooth off. I guess you checked valve clearances, they should tend to max.

Greetings
Rufer

[rostwor]

Re: Could be a ECU problem?

TPS are good.

Now is 0-8 degrees in Poland and when the engine is cold, it won't work properly. When the RPM are between 2000-3500 there is strong knocking in the engine...

[bacchus51]

Re: Could be a ECU problem?

First thing I would check for is there any fault codes by bridging diagnostic plug under seat and running engine. C00 is normal. Then perhaps fuel pressure.