Loomin hell

[Scuba-Sparky]

Hi All
Still have not bought a ECU yet , just read the last few pages, then went out and had a fiddle about on the beast. Checked the throttle bodies with a stethoscope and DTI, guess who has 0.35mm play on the left and 0.32mm play on the right hand throttle body So they will be coming off soon for visit to the machine shop and a bushing.
So hope that will sort things out.

Scuba

 

[davegs]

My throttle bodies have as much rattle as this and makes no difference to the running 87000 and runs well, so look elsewhere.

 

[Madmountainman]

I had this same running problem on my 02 1150 Adventure.... i've now got a 54 twin spark!

 

[boxer]

New throttle cables maybe?

 

[Steptoe]

Thanks for the links. I've already checked the wiring and it's good. In fact the sensors check out in every respect and there are no indications of any sort that they've failed. .

The new beta version for the GS911 diagnostic has a test programme for the two hall sensors and a timing check and adjust.

 

[sproggy]

The new beta version for the GS911 diagnostic has a test programme for the two hall sensors and a timing check and adjust.

Good to know, but my 1150 has found a new partner through the vehicle/owner dating agency that is eBay and has now emigrated to a foreign land.

My (perfectly-running) 850 and I are off on a jaunt around France and Spain, taking in the Jerez MotoGP along the way, in a weeks time, although I may be looking for another 1150 later in the year. I can say one thing for sure - it won't be an '02 model.......

 

[Scuba-Sparky]

Hi All
Well the throttle bodies are off for rebushing and spindles repaired, did notice that the seals on the throttle spindle were knackered, to the point of not even touching the spindles (Air leak?) So where do you take the readings to set the TPS? So far all the searches I have done have come up blank !!
So now off to Vines to get some spares.
Will let you all know what the out come is when the Grey Zebra is back on the road.

 

[Scuba-Sparky]

Hi All
Bodies are back Mates bringing the vacuum gauges round on Sat

What I did find when taking bits off, I found a plug with a green lead which looking at the wiring loom diagram is on the same circuit as the coil & possibly used for the ABS unit (not fitted on mine). Well the end of the brass pin in the plug stands just proud off the shroud was rubbed clean ( i.e. nice and shiny) so if that was touching the frame/engine and dropping the system voltage. Could be what was causing the problems.
So now have to wait for the weekend before the Grey Zebra is back on the road.
Will let you all know.

 

[Scuba-Sparky]

Hi readers,
Rebuilt throttle bodies on, new throttle cables, TPS set as well.
Then all balanced . . . . . then out for a run.



NO Surging!!!!!!!!!

What a change, never known the Zebra to go so well

Off for a proper run tomorrow.

 

[Dazlove]

Well Done

Well done Scuba-Sparky!

As per a previous response, seems months ago (probably is!) but that is what I believed fixed mine.

Since then she has performed brilliantly, apart from a small hiccup which a new fuel pump fixed.

I know there are a few doubting thomas's out there regarding this issue, but I am sure that at that moment (when the sssstutter appears) the engine is running very lean, and air leaks at the TB's tip it over the edge.

Anyway, glad to hear you have finally sorted it out.

Just in time for the good weather

Best regards

Dazlove

 

[Scuba-Sparky]

Hi Dazlove
Went out for a proper ride today she was suffering from a few flat spots , but I changed the pins over on the fuel relay thingy under the seat (See Steptoe thread ) Oh boy I can't wait to get down to the Pyrenees in a few months time
A friend off mine had a quick go on the Zebra and going by the look on his face when he got back I think she is just about right!
So to all the others who put there pennies worth in on this thread, thanks for the advice, tips and feed back.

 

[Scuba-Sparky]

Hi All
Just come back from the big France trip.
The gremlins were back with there mates!! Reset the TPS setting twice and changed the fuel relay positions a few times (See Steptoe's link) just to get the bike ridable.
The problems I now have are;-
When the engine is cold or been stood for half hour, no problem all is ok.
When the engine is warm and on tick over, after 30 secs the tick over will start to drop until the engine stalls.
And when riding and at constant rpm (any where in the rev range) after 2 - 3 seconds the engine will start to loose power, cough, splutter and slowly die till it stalls. only way to over come this was to slowly but constantly move the throttle by a few millimetres either way.

So my learnered friends, would the Lamber sensor have any effect or give these problems? And no I dont want to buy 1200!
Any ideas?

 

[duc888]

Good Evening,
I have a very similar problem on an 03 twinspark GS, that has been driving me batsh!t for about two years. The bike will run fine until about 4500-5000, when it will start to splutter and misfire (run fluffy sums it up). I have changed the stick coils, the ECU, the lambda sensor (after a visit to Steptoe showed it to be faulty), swapped out the injectors, changed the airbox sensor. The TPS is set spot on at idle according to Steptoe's diagnotic tool.
The bike seems slow to crank and initially would not crank until I removed and cleaned the starter, it does still seem a bit sluggish to crank. Having noticed earlier on the thread that this may damage the HES, I am wondering if this should be my next component to change or perhaps fit a second hand TPS, in case the TPS is out at higher revs.
Does anyone have any other ideas? I also have an ECU if anyone needs one.

Cheers

 

[sproggy]

That doesn't sound like surging to me so it's not really the same problem. It's also at higher revs than most people have experienced problems.

Having eliminated all of the possibilities that you've tried I'd be looking at the fuel pressure regulator and/or the fuel pump - lack of fuel pressure could be making the engine run too lean at high revs/loads. But if that is the case you should be able to tell from the plugs, and the bike would tend to be running too hot.

Or maybe it's something simple like a bad earth connection to the engine - that would also explain the starting problems.

 

[duc888]

Sproggy,
Thanks for adding to my now considerable bits to check. When speaking to Steptoe the fuel filter was mentioned as a possible, given that it is possible that this was not changed by the dealer.
Is it possible to put the filter in the wrong way round and if so will fuel still flow, all be it, at a reduced rate.
The reason I ask, is that this problem appeared after a visit to the dealer. Given that I was using the bike to commute, and couldn't be arsed taking it back to complain and listen to excuses, I have ridden it like this for 2 - 3 years.
There does not seem to be any problems further down the rev range.

Thanks again.

 

[sproggy]

I don't know what the consequences are of putting the filter in backwards - it would matter only if it contained some sort of one-way valve, I guess.

If your filter hasn't been changed for 2-3 years I'd suggest changing it anyway then you've eliminted another possible cause, whether it's fitted incorrectly or is partially clogged from dirt in the tank.

 

[follow me]

Hi Scuba-Sparky

My GS is doing exactly the same thing, I've only owned it six weeks and in that time it's only every run well once. One the test ride... It's got worse and worse, stuttering and cutting out once it's warmed up, more so under any load. Going up hills gets me talking to her "come on old girl you can make it" god I miss my Honda. So it seemed like a hall sensor on its way out.. Changed this week and no change.

So it's been twice to see Steve at Motoscot, he's tried everything. Coil, ECU, Injectors, fuel pressure.....bla bla bla . I can't fault the work he's put in . Still it's no better and if anything its getting worse.

I'm not sure what to try next... I know what I'd like to do. But I have a year of travel planned and not the money to get another bike.

 

[monkeyboy]

I've still got the GS I started this with - years ago now? I've just changed the timing chains and reground the valves, balanced the lot perfectly etc, still hesitates and surges, especially round 2.5-3k, and especially especially going down a slope on constant throttle. I've changed absolutely everything now so I reckon these are just hypersensitive to setup - what else is there to blame. That said, a lot of people's bikes are a lot worse than mine by the sounds of it.

And...I bought a Honda.... and I wish I had not. 2010 CBF1000. 2013 - winker and engine fan stop working and throttle is dangerous, going totally random up and down. Put it in the dealers..... wiring loom is rotted through at the fuse box.. 13k and 30 mnts old... really? Off the road for a month - Honda put a new loom in FOC - first ride, random throttle is still there. Trying to kill me on the M3. Back in the dealer weeks ago - they don't know what's wrong with it. I've got it on video, they can reproduce but not fix it. Biggest piece of s*it I ever bought. The handlebars and footgear chrome looks like my pushbike from the 1970, almost completely brown. I quite often just forget I've got it anymore cos it's been away so long. Its only been with me for a week in the last two months... I'm hoping it's going to commit hari kari in the workshop.

 

[monkeyboy]

Hi Scuba-Sparky

My GS is doing exactly the same thing, I've only owned it six weeks and in that time it's only every run well once. One the test ride... It's got worse and worse, stuttering and cutting out once it's warmed up, more so under any load. Going up hills gets me talking to her "come on old girl you can make it" god I miss my Honda. So it seemed like a hall sensor on its way out.. Changed this week and no change.

So it's been twice to see Steve at Motoscot, he's tried everything. Coil, ECU, Injectors, fuel pressure.....bla bla bla . I can't fault the work he's put in . Still it's no better and if anything its getting worse.

I'm not sure what to try next... I know what I'd like to do. But I have a year of travel planned and not the money to get another bike.

A hall sensor on the way out? unless it's misfiring I wouldn't think its that personally. They work or they don't. Maybe lambda? Have you changed that? Is it ok under acceleration on the flat/downhill? Popping on overrun? HT Leads? What do the plugs look like?

 

[follow me]

Sadly this will be my last GS, 5 years of fire blade ownership and not one problem. Toured Europe a couple of times and commuted into work every day come rain or shine. Wish Id kept it, stuck on some bar risers and for what the GS has cost me I'd have had a nice holiday in the south of France.