Bike still running choppy when <180 deg. F

OK its got a problem with the cold map.

at 180 it goes to the hot map.

i'd run some injector cleaner thru the tank first be fore continuing to change things.

its worth swapping in another ECU to eliminate that as a possibility.

check this

remove tre ........any difference?

check clutch switch .....

clutch in /out........

let me know results

MtnMan said:

Hello,

My 1998 TLS has been running very choppy (like a light switch on/off) whenever the engine temperature is < about 180 degrees, especially with light throttle.

I got the TRE mod, and - thanks to fellow forum member Riddick - recently adjusted TPS and synced throttle bodies. I was hoping that these adjustments would help, but the bike still runs very choppy when the engine is not hot.

Once hot it runs very smoothly.

I just installed a Yoshimura RS-3, which did not affect these symptoms. Should I get a Power Commander or does this temperature dependent behavior point to some kind of issue that cannot be fixed with a PC?

Thank you very much in advance!
Armin

Click to expand...

Welcome to the club Armin!

You have just described my TLS! My '98 TLS has acted like that since day one. Well, honestly, I'm the second owner, but I bought it with 6900 miles on it in 2000.

I am very curious to know which ECM your are running. Mine is part number 32920-02FJ0.

As you say, it is like a light switch. It is a 'cold map' problem. Once it reaches 176F degrees everything is fine. However, when on the cold map, mine primarily runs ratty below 3200 rpm. When the revs are higher that 3200 it runs pretty good.

A Power Commander will not help the situation. Although it can help you get the fueling right if you are runnig intake and exhaust mods.

For the last year or so, I have been running it with a modified Engine Coolant Temperature (ECT) sensor circuit. It has been a great relief, since I no longer have to wait for it to get to temp. If you are interested in this mod, I'll point you in the direction of the fix. There is a thread on it. I just need to find it. :banghead

ECT Resistor Mod

This is the ECT Resistor Mod thread.

http://www.tlzone.net/forums/help-forum/132531-installing-resistor-switch-cold-map.html

It is simply a matter of fooling the ECM with a different resistor value to make it think the coolant temp is above 176F (80C) - effectively forcing it to run the 'warm' map.


My memory failed me. :banghead It hasn't been quite a year. It was only last March when we were playing with resistor values. :laugh

It may not be the perfect solution, but it will remain on my TLS until I can get my hands on another (different version) of the ECM.


:tillis

Thanks guys, for the helpful responses!

• I tried this with and without TRE. The difference - if there was any - was very small; it did not change the temperature dependent behavior.
• check clutch switch ..... Have not done this yet. How should I check it?
• clutch in /out........ Does not make any difference. The idle is stable.
  
  After I recently installed Yoshimura RS-3's the idle speed went up (to about 1,500 rpm) when the engine is hot.

Six5, we do have the same ECU!





Thank you also for forwarding the thread for the ECT resistor mod; I will read the whole thread, which hopefully will give me enough guidance.

I am also considering changing to a different ECU, will look in the "For Sale" section and on eBay. Which ECU should I get for my 1998 TLS?


Greetings from wintry Colorado,
Armin

MtnMan said:

.....

I am also considering changing to a different ECU, ,,,,, Which ECU should I get for my 1998 TLS?


Greetings from wintry Colorado,
Armin

Click to expand...

Aside from SteveTLS' list here, I really don't know enough about the differences to recommend one over the other. It will be an experiment on my part when I get around to trying a different ECM.

http://wotid.com/tls/content/view/25/49/

Apparently, Suzuki made changes to the ECM after 1997 since our ECM number is not on the list Steve compiled. :O

The 32920-02F41 model seems like a logical choice to try, but that is just a guess. :confused

TL1000S(V)(1997):TL1000S(W/X/Y) (98/99/2000):
[HR][/HR]

MtnMan said:

What I still don't understand: are all 32920-02FJ0 ECM's "bad" and show cold map issues?

Armin

Click to expand...

It is difficult to say if ALL the TLS ECMs of that model number are "bad," but there are reports from others who have experienced the same effects as you and I. They also found no resolution for the issue - yet (as far as my research has revealed :dowhat)


Here is a thread from March 2009 that was started on the subject of a glitch in the TLR's fuel injection that is sensitive to the cold/warm maps. However, two TLS owners (D'Ecosse and Schiben) described their 'cold map' problems to be identical to the what you and I have experienced. See post #s 18, 21, 29, & 32 in the thead.

Interestingly, they don't mention the ECM model numbers, but they both were (are) US residents, and at least D'Ecosse indicates that the TLSs were both '98 or newer in post #24. Therefore, they reasonably may have had the same ECM part number. A little more research may tell the story. At any rate, have a look. At least you know you are not alone. :laugh

http://www.tlzone.net/forums/help-forum/108848-cold-running-vs-normal-map.html

I recall reading about this same issue from another (third) member in the past, but I have yet to find his post. ???


Armin, I'm looking forward to hearing the results of your testing with the 'new' 02F41 ECM. You should be prepared to still feel some effects of the cold map, but hopefully, it will be much improved over what you have now.

:cheers