Mileage / consumption - normal?

[victorlaszlo]

I hear what you are saying Roger and believe the error to be elsewhere, like you suggest, but do not agree that the changes the plugs do are minor. I had to take mine off after half a tank because it tan like a pig, flat spot around 2200 rpm and would stall at breaking and at traffic lights.

Consumption in the half tank about the same as previously...

Going to investigate my suspicion during the week and report back


Sent from my iPhone using Tapatalk

[victorlaszlo]

Originally Posted by bradzdotcom

looks a whole lot like a set of Staintune mufflers.

If that's the case that's stamped into the left one and "Remus" stamped into the right one. Or vice versa. Just above the exit tubes.


Sent from my iPhone using Tapatalk

[Roger 04 RT]

Originally Posted by victorlaszlo

I hear what you are saying Roger and believe the error to be elsewhere, like you suggest, but do not agree that the changes the plugs do are minor. I had to take mine off after half a tank because it tan like a pig, flat spot around 2200 rpm and would stall at breaking and at traffic lights.

Consumption in the half tank about the same as previously...

Going to investigate my suspicion during the week and report back


Sent from my iPhone using Tapatalk

The Coding Plug affects fueling and ignition advance. The ignition advance changes could be meaningful.

As for the fueling, the target AFR in the Closed Loop area is always lambda = 1 (for all R1100S and R1150 Coding Plugs) which is 14.7:1 for gasoline or 14.1:1 for fuel with 10% ethanol. Even if you switch plugs, Closed Loop adaptation tables (long term trims) always bring fueling back to the AFR specified by the O2 sensor. This is why lambda-shifting of the O2 sensor works so well (LC-2 or AF-XIED). The shifted O2 sensor signal leads to the Motronic developing richer long term trims and you get more fuel.

[the last word]

you should be able to milk this thread through all of 2016

And that's the last word...

[hugzy]

Careful. On the 99 to 2002 1100 s the motronic fuse is F4 according to the book. Left hand fuse box. Don't remember leaving my fuse out for so long , Maybe ?

[hugzy]

Originally Posted by the last word

you should be able to milk this thread through all of 2016

And that's the last word...

It might be quite important to some people and informative to others.

[hugzy]

If you're interested here's a load more about ccp's

CAT Code Plug Pin-outs - BMWSportTouring Forums

[Roger 04 RT]

I don't mean to be a broken record but the only way to know the coding plug configurations is to read them from the Motronic or remove the EPROM and find the coding plug text strings. As in my earlier post in this thread they vary from Motronic to Motronic.

[victorlaszlo]

Ok, so back again after further trial and errors and with some new information.

Since last I've resetted the motronic a couple of times, replaced the lambda in case it was dodgy and had the entire Remus system off the bike and refitted it due to respraying of the subframe and installation of an Ohlins shock, all to no avail.

However, I was given the number to a tuner who can re-flash the ECU in the R1100S and had a chat with him and according to him the consumption issue I have is due to over or under fuelling caused by the now much more open system which will both cause the same effect; excessive consumption.

Unfortunately, and Roger perhaps you have the technical knowledge to confirm this, my bike being a -99 most likely has the "old', non-flashable ECU which means re-chipping it would be the only option unless I replace the ECU, fuel injectors and fuel pump with a newer version.

When it comes to power commanders and replacement chips he was fairly negative but considering both Remus and Laser supplied their systems with a chip back in the days, or at least offered it up as an optional extra, can they all really be that bad?

Is perhaps my only options to get the consumption back down to normal to:

1. Re-chip
2. Replace ECU and flash
3. Ditch the gorgeous Remus system and go back to stock

Any thoughts appreciated, sorry for dragging out on this but desperate to find a solution to this as I'm getting 90 miles per tank at the moment ;(

[Jay K.]

90 miles to the tank is definitely an issue.
My BCR has a Remus cat-delete exhaust, Lennies snorkel, a SJBMW Superfilter, Rocket Sprockets, and a chip...and I get about 120 miles to a tank, or 35 +/- mpg. I get annoyed having to stop so often. But at least I know why.

[victorlaszlo]

Tell me about it! :O

If anyone has a chip lying about then pretty please let me know


Sent from my iPhone using Tapatalk

[Jay K.]

Originally Posted by victorlaszlo

If anyone has a chip lying about then pretty please let me know

I got mine from Lennie of Induct fame.

[victorlaszlo]

Original exhaust going on next week to confirm the exhaust is the culprit...


Sent from my iPhone using Tapatalk

[wiggledbits]

Originally Posted by hugzy

It might be quite important to some people and informative to others.

Yes, keep updating please. I have an 04 11s that has the same symptoms as of the end of last riding season. The only thing I would add is I can smell the un-burned fuel, wont idle without the fast idle full on until warm, After I de-catted and added a K&N air filter. I added a techlusion (took out O2 unit) and took her to a tuner. She was way way lean on the lower end so it was juiced up. Now 10k miles later she is obviously way too rich. I get about 125m a tank around town with a medium right hand.

[victorlaszlo]

So, bike's back after having been stolen and I've resolved the issue.



What I did was swapping my rather early ECU (2.2?) with one of the later (2.4) and problem is gone, these are my current consumption figures:



Old ECU number: 1 342 509
New ECU number: 7 670 336

Both Bosch.

[sgoodwin]

Glad you figured it out. I've been running a Laser exhaust with Laser chip for 10 years on my '99without any problems & decent mileage so I was pretty sure that wasn't your problem. My mileage only drops into the 35mpg range when I'm getting crazy in the mountain twisties or full throttling around the outback (in my case swamp land). Needless to say 98 octane doesn't really exist here as everything is 10% ethanol enriched (a totally b.s. term) so 93 is about the best it gets without major hassles hunting down real gas.

[victorlaszlo]

But the chip is probably what makes the difference there. I suspect the really old ECUs are too "stupid" to understand there's been a change to the system and keep on going as if the cat and old exhaust were still attached... Whereas The newer relearn and adapt to the changes to the system (which can be achieved using a chip instead as in your case)...


Sent from my iPhone using Tapatalk

[BigDav]

Just for future reference. My totally stock R1100s gets 42 mpg (US) romping on it. 45 mpg city commuting and a solid 50 mpg on the highway 70-75 mph.