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Please Help S3 955i

2K views 18 replies 5 participants last post by  Speedy92 
#1 ·
Hi all...
my friend has speed triple 955i from 2003 , I loaded 10156 map , it has standard exhaust, SAI and o2 on the bike, so all in all it's factory.

there is too much oscillating on idle and also when driving 160km and when I add more gas it somehow "hiccups"

I took some pictures of the parameters after loading new map and new air filter, it was in proces of reseting adaption, so here are the pictures can you tell me if these parameteres that you can see are in good order??




 
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#4 ·
You have no MAP sensor on your Sagem ECU Speed Triple system.

Nothing on your screen-shots looks abnormal

They all oscillate a bit on idle*, that is just the closed loop control working - you can improve it possibly with a throttle balance.
Your 'hiccup' (hesitation/surge) is because it is lean - all the stock maps are bit on the lean side.
Even though you have stock exhaust you might consider trying one of the 'TORS' maps (10158) or one of the custom maps

*Assuming we are just talking minor oscillation - if it is getting really high rpm, then look to your IACV hoses for signs of cracking/leaks and replace as necessary
 
#8 ·
I just bought an 04 Speedy, with only 22,000Km on it. Idling was a bit fluffy. Checked the vacuum hoses and all were totally perished at the ends. They fell apart in my fingers after removal. I suggest you check them.
 
#10 ·
Thank you

2 days ago I filled the tank with 13,5 litres, after about 100 km low fuel lifht came on
Tank capacity is 22L - low light is supposed to come on at with 4L remaining;
So you have several potential scenarios
1. it wasn't really full when you put the 13.5L in
2. the light is coming on with more than 4L remaining
3. if it was full and light is accurate, then you have very high fuel consumption.
4. Is the 100km a true reflection of how far you really went or is there a problem with the odometer?

First determine if you have a fuel consumption issue, a low fuel light issue or another issue
- Forget about what you filled LAST time or fact light is on - refill it to see how much it takes NOW to make up to same level you filled previously; and that is how much you used for your 100km (or whatever the current indication is at time of fill)
- Are you estimating or taking the 100km from the Trip odometer? Did you reset it to zero when you filled? Check that it does not reset when you turn off the ignition (blown fuse if it does); also note if battery was disconnected during that period, the trip would also reset to zero.
 
#13 ·
well...now it's 12.5 litres per 100 km, I removed o2, put new FINE map (10156) and I did unchecked o2 in tuneecu...what do I need to look at , it's probably something wrong with the engine, it's not something I can repair it with tuneecu and remove 2 screws xD so...I don't know
 
#14 ·
again, after few moths....so everything is the same, I would really appreciate if someone could tell me what can cause the spark plug to be black, and wet...so obviously there is getting to much fuel

I removed o2 sensors, SAI is still there

the map in the bike should be o the lean side, not on rich, and I mean rich side
 
#15 ·
A couple of potential things that could cause high fuel consumption:
1. Bad Fuel Pressure Regulator - pressure is really a lot higher than it should be
2. Leaking Fuel Injectors

if someone could tell me what can cause the spark plug to be black, and wet
If they are equally affected, it would be common to all three so might be more likely to be the fuel pressure regulator
If the plugs are not all the same - one worse than the others - then you might expect an injector problem.
It would be odd for all three injectors to be leaking (but not impossible either)
 
#17 ·
Are you saying there is Fuel in the hose from the small nipple on the outside of the Fuel Pressure Regulator?



On the 2003 there would be no hose fitted:
What is that hose connected to on this bike? (on earlier model it would have gone to the airbox, but was deleted by 03) - it should just be 'open' with nothing connected.

But if you have fuel in there, regardless of where hose is connected, that is definitely a problem!

The only way to to know if regulator is working (to correct pressure) is to connect a pressure gauge to the fuel line - it needs to be 'tee'd' in and the circuit MUST be complete (i.e. both supply and return lines are connected to the pump)
There is info in this post on how to make one without cutting your OEM hose - http://www.triumphrat.net/daytona-deliberations/229379-fuel-fitting-replacement.html#post2484450
It should read 3 bar when pump is running.
 
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