Anyone used one of these Gunson exhaust gas testers - looks like it might do the job?
http://www.ebay.co.uk/itm/310452348999
http://www.ebay.co.uk/itm/310452348999
Throttle body balance - zero=zero etc...
- Thread starter MattW
- Start date
yes - total POS.
i now have a snap~on/blue point unit, and even that is unreliable. it's been re-conned twice.
Ah - scratch that then
I'm just about to give up on this - my local MOT station will soon run out of patience with me (if they haven't already).
Trouble is, I can't even find a local bike mechanic (who has a clue about BMW's) and who has an exhaust analyser to set up the f***ing CO pot
An exhaust gas analyser will not tell you too much on that engine. The Co and Hc are very high on those engines anyway.
If you lean off the mixture, Co, it will push up the amount of unburnt fuel Hc. They like to run rich. You can get away with slightly too rich but not with slightly too weak.
Did you check that the injector was producing a fine atomised spray?
If you lean off the mixture, Co, it will push up the amount of unburnt fuel Hc. They like to run rich. You can get away with slightly too rich but not with slightly too weak.
Did you check that the injector was producing a fine atomised spray?
I happened to visit my local BMW dealer today (Chester Motorrad) with a friend who was booking his twincam 1200 in for a service.
As I was there, I thought 'sod it, I wonder what they'd want to sync my TB's and set the CO'...
So I asked the service manager if they were geared up to do this on early 1100’s, being careful to point out that it was an early 1100 with a CO pot and no lambda sensor.
He said yes, I'm sure we can and I asked "so you've got an exhaust analyser then?".
He replied (smiling at me like I was some sort of Luddite) "no we don't have anything you actually stick in the exhaust - we'll put it of our diagnostic machine"
So I'm thinking to myself 'how the hell is your diagnostic machine going to tell you the CO on an 1100 - you don't know what you're talking about do you?'... But I let him work out a price for me anyway.
With the classic sucking of teeth, he said "well it'll probably take one and a half hours, so it'll come to £140"
Resisting the urge to say something along the lines of 'you robbing tw*ts, how to you make a TB sync take an hour and a half?!', I just said "thanks, I'll get back to you"...
As I was there, I thought 'sod it, I wonder what they'd want to sync my TB's and set the CO'...
So I asked the service manager if they were geared up to do this on early 1100’s, being careful to point out that it was an early 1100 with a CO pot and no lambda sensor.
He said yes, I'm sure we can and I asked "so you've got an exhaust analyser then?".
He replied (smiling at me like I was some sort of Luddite) "no we don't have anything you actually stick in the exhaust - we'll put it of our diagnostic machine"
So I'm thinking to myself 'how the hell is your diagnostic machine going to tell you the CO on an 1100 - you don't know what you're talking about do you?'... But I let him work out a price for me anyway.
With the classic sucking of teeth, he said "well it'll probably take one and a half hours, so it'll come to £140"
Resisting the urge to say something along the lines of 'you robbing tw*ts, how to you make a TB sync take an hour and a half?!', I just said "thanks, I'll get back to you"...
motobiker
Registered user
You've made it last almost 12 weeks... 12 weeks since this thread was started and god knows how long its been problematic before that.
and you balk at paying for 90 minutes with a reasonable expectation that they might actually be able to achieve what you've failed at so far.
amazing, Just amazing.
A suggestion for you to agonise over - phone Scriminger - book the bike in. ride it over... leave it with them, go and have a bite to eat while they sort it. Then ride it home.
A nice day out.. 260 miles or less of a round trip - and a final end to this nonsense.
Nope.
Although I firmly believe that the service manager was trying to shaft me with his 90 minute quote, I'd actually have considered it if I had any confidence that they'd actually be able to do it.
The fact that he admitted that they don't have 'anything they stick up the exhaust' and would have 'used their diagnostic computer' means that he didn't have a clue about early 1100’s. As I'm sure you're aware, early 1100’s don't have a lambda sensor or any other real time sensor that they could interpolate a fuel air ratio and hence CO reading from.
I'm currently trying to find a reasonably local independent (who understands oilheads) and can set it up for me. The CO has stumped me - unfortunately it's a 'routine service' type job that I don't have the tools or experience to deal with.
Oh and Tony, if all you able to do is chip in with snide, sarcastic little jibes, please feel free to stay the **** out of my threads (insert your own expletive).
I don't think you've got a co pot problem...that's the fine tuning you do when everything else is good.
Mine would idle perfectly at around 800 revs and ride well down to 1500 rpm in top .
I could twiddle with the co pot and there was no difference.
All I used was a manometer and digital rev counter and a multimeter for the tps. You can set the tps using the multimeter and the dig rev cntr for highest revs.
You have to know you have equal compression and no leaky exhaust valves tho.
Mine would idle perfectly at around 800 revs and ride well down to 1500 rpm in top .
I could twiddle with the co pot and there was no difference.
All I used was a manometer and digital rev counter and a multimeter for the tps. You can set the tps using the multimeter and the dig rev cntr for highest revs.
You have to know you have equal compression and no leaky exhaust valves tho.
ian6760
Registered user
Isn't that the 2nd time you've told him to do one now?
This might be clutching at straws but there's a guy called Scott in Bretton motorcycle by Saltney who told me years ago that his dad was the main man for BMW's back in the day. Not sure if it was in early oilhead days, but it might be worth a call. He might be able to point you towards someone local.
HTH
Ian.
newboy
mechanical buffoon
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Matt. Have you called Roy at RGM and asked if he can help??
Sent from my gadget using wires n string n stuff
Sent from my gadget using wires n string n stuff
After refitting my TB's a couple of days ago, I rebalanced everything from scratch starting with the air screws 2 turns out. It balanced up at about 1000 revs but ran lumpy. So I thought about the CO pot and tried turning it in (clockwise from underneath - not sure if this is 'richer' or 'leaner') and it smoothed out appreciably and the revs rose about 200 rpm. So I'm sure there's scope for 'tuning' the pot to get it right (and I'm concerned about running it dangerously lean). I stopped at this point - I'll try to get hold of a digital rev counter and I might have another go.
Isn't that the 2nd time you've told him to do one now?
This might be clutching at straws but there's a guy called Scott in Bretton motorcycle by Saltney who told me years ago that his dad was the main man for BMW's back in the day. Not sure if it was in early oilhead days, but it might be worth a call. He might be able to point you towards someone local.
HTH
Ian.
Thanks
Thanks - I dropped Roy an email yesterday (i was out of the door to early to phone). No reply as yet - I'll try and phone him today.
Canuck
Registered user
Hey Matt, is there a piece of your bike that you haven't taken apart multiple times? It seems that your other threads with clutch/rear main seal changes etc all involve everything coming off quite a few times. So, my question is... was there anything wrong with your tbs in the first place... or were you just getting bored ?
i stand top be corrected on this, but think the pot only affects low speed running, so not much chance of damage.
Hey Matt, is there a piece of your bike that you haven't taken apart multiple times? It seems that your other threads with clutch/rear main seal changes etc all involve everything coming off quite a few times. So, my question is... was there anything wrong with your tbs in the first place... or were you just getting bored ?
I feel maligned
I've never done the clutch or main seal (did have to do the gearbox output shaft seal twice though
)There was / is a problem with idle smoothness and a sooting tailpipe, hence the checks I've been doing.
Thanks cookie
Canuck
Registered user
I feel maligned
I've never done the clutch or main seal (did have to do the gearbox output shaft seal twice though
There was / is a problem with idle smoothness and a sooting tailpipe, hence the checks I've been doing.
Thats the one... I thought as it had been on and off so many times you must have changed more things
I remember you talking about the idle at Verns place a few years back... given your ingenuity I'm surprised its been so tricky to diagnose. If you want my harmonizer for a week I'm happy to post it up! Not that it will do anything special but if you think it may help make things easier more than welcome.
Thats the one... I thought as it had been on and off so many times you must have changed more things
I remember you talking about the idle at Verns place a few years back... given your ingenuity I'm surprised its been so tricky to diagnose. If you want my harmonizer for a week I'm happy to post it up! Not that it will do anything special but if you think it may help make things easier more than welcome.
I've been trying to buy a harmonizer for a year! Thanks for the offer of a loan of yours -I'll see how I get on with u-tubes etc. If I can find a local 'expert', I'll probably just pay him to do it.
Off to the alps in 6 weeks, this is the last job before I go.
The Co is correct when you turn the Co screw to give maximum rpm at idle. This is better than setting to an exhaust gas analyser reading.
Stewart H
Registered user
When I had CO problems (possibly imaginary) I eventually found on this forum some figures where a chap set up his CO pot using a multimeter, I did the same with my spare pot and fitted it, it works fine, just need to find the thread, I think he was Australian.
Thanks Smug - I'm going to try this over the weekend.
When I had CO problems (possibly imaginary) I eventually found on this forum some figures where a chap set up his CO pot using a multimeter, I did the same with my spare pot and fitted it, it works fine, just need to find the thread, I think he was Australian.
Cheers Stewart - I'll have a dig for this thread.
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