JohnGS1100 Tuning Chip

[Roger 04 RT]

In this chart, the O2 sensor voltage is 888 mV and the engine temperature is 44C. This is telling you a couple things:

--The engine hasn't warmed up enough to run Closed Loop (usually the happens above 60C).

--The exhaust AFR is richer than lambda = 1 (14.7:1 AFR for gasoline without ethanol). At 888 mV the AFR is probably in the range of 13.5:1.

In order to run well below normal operating temperatures, the AFR has to be richer than usual due to poor atomization and condensing of fuel on the TB, valves and cylinder walls. Therefore, immediately after starting, the Motronic stays Open Loop and runs a special warm-up enrichment mode. The enrichment starts at about 15% and declines to about 3-5% depending on Air and Engine Temperature and time.

Note that the RPM is fairly low at 900 RPM. Either you don't have the fast idle lever pulled up or you don't have it adjusted so that the slack is minimized. When the Fast Idle lever is in the mid-detent position the TPS should read about 3.5 degrees.

In the next chart you will see that the engine is warmer and the Closed Loop program is running.

 

[Roger 04 RT]

In this chart the engine temperature has reached 68C and the O2 sensor voltage is varying between about 100 mV and 800 mV. This is normal Closed Loop operation. The Motronic is slightly increasing and decreasing the injector pulse width so that the AFR is going up and down between about 14.4:1 (800 mV) and 15.0:1 (100 mV).

Note that the engine speed is 1000 RPM, on the low side but at 68C the engine isn't fully warmed up.

 

[Roger 04 RT]

In this last chart, the engine is fully warmed up at 97C and O2 sensor voltage begins at 84 mV. It indicates that something disturbed the fueling, maybe you had blipped the throttle just before the chart started recording. At 84 mV the AFR is in the mid-15s:1, too lean.

The time on the left is 2 minutes 10 seconds, and the Closed Loop operation isn't restored until about 2 minutes 20 seconds. During this time the Motronic is slowly increasing the fuel trying to figure out how much to add to restore Closed Loop operation. In this case, it probably added 10-15% and got the AFR down to 14.7:1.

In my experience, this condition occurs when something is wrong with the TPS adjustment, cable adjustments or Throttle Body Sync procedure. It can also occur if someone has run a zero=zero procedure and got things out of whack that way.

A fully warmed up engine like this should idle at 1100 RPM, should have the TPS voltage at 340mV and should have minimum, but a bit of slack in all the TB control cables. I've posted a procedure in another thread here that is an annotated version of the official BMW procedure.

 

[JohnGS1100]

Respect Roger !!!!!!!!

 

[moonhead911]

. the tps is set up using the gs-911 i have not checked it using a multimeter.. the tb was synced a few weeks a go. so it shouldn't be that. and what is the zero=zero procedure..

i will upload some more photos. the other ones i up loads was the bike just in the garage idling. this time i have been for a run about 15 miles just to get things up to temp.

 

[moonhead911]

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[Roger 04 RT]

That all looks good. If you don't know zero=zero you don't have to worry. I was surprised by the low idle. When you lift the fast idle lever to the detent, what does the TPS read in degrees using the gs-911.

Maybe on the other charts you hadn't warmed enough. Usually I like to look at all realtime values from cold start to warm up, fast idle lever on and all values logged to a CSV file.

 

[Roger 04 RT]

I noticed your battery voltage is 12.19 V do you know why it is that low on the chart? That low voltage will lead to slower injector turn on at idle and the Motronic will have to adapt to it. It leads to at least temporary leanness.

 

[Wolfman]

Chip for Standard R1100GS 1998

Hi John
How much is a chip for my bike, had her from new, 51K
Best regards
Gary

 

[a2zworks]

Stage 9 chip

Received chip 9 for my R1150GS, thank you John.

I'll install it tomorrow ready for weekend ride to the north of Tasmania 900km round trip.

Will report back with my thoughts and fuel consumption.

Pablo

 

[JohnGS1100]

Thanks Pablo. Have a nice traveling

 

[a2zworks]

Travelled 380km with 20L.
Again nice and smooth power delivery.
Found that it is very responsive down low.
Higher fuel consumption than with Stage 8 chip but fun this is good for day outings.
I would change it back to Stage 8 for touring.

John all your hard work is paying off.
What are you working on next?

Can you please PM me your address, I have something for you.

Pablo

 

[Karlread]

Tuning chip

I never received mine so can't comment, off to Hilltop for a remap....

 

[Roger 04 RT]

In sure John will send you one. Does hilltop put a new chip in? Do they leave the o2 connected?

 

[Karlread]

Hilltop map the bike as is, if you look on the RT Tourers section there have been done rave reviews about the hill top re map on 1200 series bikes and apparently he can also do 1100 and 1150 boxers.

 

[Roger 04 RT]

To remap an R1100 or R1150 you have to change the chip or you have to disconnect the O2 and add a box. Or you can do it the easy way and just add an LC-2 or AF-XIED.

 

[pharme]

chip and endless priming

hi, to all those who have installed the chip and faced endless priming when ignition is on...and wouldn't fire up, a problem I am facing now. Did you have to remove the green socket where the IC chip sits on and plant the chip directly onto ecu board, at least that's what i'm told? But I am hesitant to mod the board as it might be irreversible. Mine is an 03 GSA and with John's chip, the fuel pump primes endlessly and refused to fire up but with stock chip it runs fine. I read this thread and realise a few have this issue. I have confidence in his chip but just don't know what went wrong. Did i get a lemon piece?
PS: i have sat the chip well and redo the routine 3 times, engine just wouldn't start up.

 

[GORILA]

Had a similar problem with my 98 1100gs. Like you I could not get the bike to fire up with the new chip. Every time I replaced the original the bike worked again.
In the end, on Johns' advise I bought a later Ecu which allowed the new chip to work. I suggest you contact him direct. I found him friendly and helpful.

 

[Orinoco]

name of the allen key tool to remove ECU bolts

Borrowed these from a garage in the past, but want to buy the right allen key tool to remove the bolts from the ECU, any idea what whey might be called and where to buy?

TIA

 

[JohnGS1100]

hi, to all those who have installed the chip and faced endless priming when ignition is on...and wouldn't fire up, a problem I am facing now. Did you have to remove the green socket where the IC chip sits on and plant the chip directly onto ecu board, at least that's what i'm told? But I am hesitant to mod the board as it might be irreversible. Mine is an 03 GSA and with John's chip, the fuel pump primes endlessly and refused to fire up but with stock chip it runs fine. I read this thread and realise a few have this issue. I have confidence in his chip but just don't know what went wrong. Did i get a lemon piece?
PS: i have sat the chip well and redo the routine 3 times, engine just wouldn't start up.

You should remone the additional green socket. You no need this, fit only the chip in the ECU and the bike will work fine.