Throttle Pot adjustment
Discussion
Finally got diagnostic software up and running tonight.
Speed six software guide states that to reset throttle pots select 'reset throttle' in ecu tools menu. Was not there, so reset adaptives next best thing.
On tickover reading fluctuating around 15.2 or so as they should.
As you slowly increase rpm, No1 creeps up first and then No.2 lags behind causing imbalance in readings of around 8% at 2500 rpm or there abouts.
Is this a problem? Any ideas?
Speed six software guide states that to reset throttle pots select 'reset throttle' in ecu tools menu. Was not there, so reset adaptives next best thing.
On tickover reading fluctuating around 15.2 or so as they should.
As you slowly increase rpm, No1 creeps up first and then No.2 lags behind causing imbalance in readings of around 8% at 2500 rpm or there abouts.
Is this a problem? Any ideas?
Buffoon said:
Finally got diagnostic software up and running tonight.
Speed six software guide states that to reset throttle pots select 'reset throttle' in ecu tools menu. Was not there, so reset adaptives next best thing.
Speed six software guide states that to reset throttle pots select 'reset throttle' in ecu tools menu. Was not there, so reset adaptives next best thing.
You have the old version of the software (blue Cerbera in the background). Download the newer software and the manual for it from Byker28i:s homepage.
Buffoon said:
On tickover reading fluctuating around 15.2 or so as they should.
Looks correctBuffoon said:
As you slowly increase rpm, No1 creeps up first and then No.2 lags behind causing imbalance in readings of around 8% at 2500 rpm or there abouts.
Is this a problem? Any ideas
Yes, that will give a problem with the balance of the fueling of engine.Is this a problem? Any ideas
Get a syncrometer and balance the throttles, then start to work with the software. If the inbalance in the readings still occur you have to change the faulty throttle pot. If you do not know how to balance the throttles leave it to a specialist.
Hi Peppe
The software was the Yellow Cerb, but when you open the program you see a blue cerb?
Have balanced the throttles as they were badly out, hence I needed to reset the pots. Does your software definitely say 'Reset Throttles'? Irrespective it looks like I will need a replacement, No.1 thankfully.
Thanks to your previous work on the software I managed to get it working, so well done.
The software was the Yellow Cerb, but when you open the program you see a blue cerb?
Have balanced the throttles as they were badly out, hence I needed to reset the pots. Does your software definitely say 'Reset Throttles'? Irrespective it looks like I will need a replacement, No.1 thankfully.
Thanks to your previous work on the software I managed to get it working, so well done.
If you press help and then about, you should have ver no 1.72 on the software. It is easy to change the background to what ever you want, it is just a bitmap picture.
I have several pictures of a yellow Cerb in the background while the software is running.
Under the ECU tools meny I have reset throttle pots as a choice that is all the way down in the menu.
I have several pictures of a yellow Cerb in the background while the software is running.
Under the ECU tools meny I have reset throttle pots as a choice that is all the way down in the menu.
Proper software up and running last night. Clearly I was being a bit of a Buffoon.
Reset Throttles and still the same issue. Have raised the Idle slightly, reducing the effective dead-zone on the pot, but a new pot will be required I believe. Have noticed the engine has become tappetty in the lower rev range where I have the issue. Suspect 1,2 and 3 are running weak mixture though could be the reverse if ECU over compensating. May need to get tappets done again if valves have been overheating.
Reset Throttles and still the same issue. Have raised the Idle slightly, reducing the effective dead-zone on the pot, but a new pot will be required I believe. Have noticed the engine has become tappetty in the lower rev range where I have the issue. Suspect 1,2 and 3 are running weak mixture though could be the reverse if ECU over compensating. May need to get tappets done again if valves have been overheating.
New pot made little difference.
Throttles were balanced on idle prior. Considering balancing 1 and 6 on the laptop with throttles 1/2 open and ignition on but engine not running then working from there. Alternatively white pot needs replacing, then start afresh. Readings balanced on idle and at high revs, i.e extremes of potentiometer miper movement. It's the idle to 3000 rpm range that is poor. When pot 1 reads 18, pot 2 is around 26-27, and adaptives show around +18 and -4. Figures approx as working from memory. Lambdas seem fine.
Maybe concerned needlessly but I expect close tolerences on such a fresh engine.
May take her back for services and get tappets and followers checked rather than waste more time balancing.
Throttles were balanced on idle prior. Considering balancing 1 and 6 on the laptop with throttles 1/2 open and ignition on but engine not running then working from there. Alternatively white pot needs replacing, then start afresh. Readings balanced on idle and at high revs, i.e extremes of potentiometer miper movement. It's the idle to 3000 rpm range that is poor. When pot 1 reads 18, pot 2 is around 26-27, and adaptives show around +18 and -4. Figures approx as working from memory. Lambdas seem fine.
Maybe concerned needlessly but I expect close tolerences on such a fresh engine.
May take her back for services and get tappets and followers checked rather than waste more time balancing.
Adaptives should be less than 10% but 5% is possible. Tappets have to be correct or you will get problems and never get good adaptive values. When setting throttle pots you have to start at the centre/cable link and then move outwards or you will not take up the lost motion this is often the reason for a slow response on one pot.
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