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With the magic of youtube file transfer.
That came out exceedingly well Popgun, here's where a memory scope has it over an analog one.
Very clear and even better when slowed down with vlc video player,you can again clearly see the phase order reverse in the second set of pulses and continue closing as time passes as is shown by the order of the pulse train.
Good study material, thank you sir.
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Thats a nasty knock in your engine, Lord Popgun.
Nice work on the upload by the way.
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(05-05-2020, 09:10 AM)Cormanus_imp Wrote: Thats a nasty knock in your engine, Lord Popgun.
Nice work on the upload by the way.
It's the counter balancer. No wait. Its the oil. What is the best oil and weight to use
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Dactyl Intergalactic Omnigrade.
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Ah yes, forgot about that unobtainium oil
During the runs for the pulses it was interesting to watch the operation. I didn’t record it, but after a run for one of the videos I inside for a while. I forget how long but the engine cooled a fair amount. Then I went back out to the garage.
When started the engine idled at ~1150 for 10 seconds or so (engine not cold now) and then pulses appeared and idle went up. Couple of seconds and more pulses and it went up again. Then when it was ready more pulses and the idle started its journey back to 1100.
Now if I can just get some pulses from the speed sensor for that thread a while back...
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I'm a bit with Houtman. I could look at that video for a week and be none the wiser. Still, it remains interesting that this issue continues and you guys continue to learn about it.
I noticed that Max apologised earlier for posting things in a great deal of detail that some may not be interested in. No apology is necessary, Max. One of the excellent things about this forum is the way people pitch in to solve problems. The detail is important if you know what you're talking about. Mechanical klutzes like me can ski over it or choose to follow along in the faint hope we just might learn something.
Thanks again to you all for your continuing efforts.
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Speed ... check condition brass connections the ECU and other items to the ground.
This is under tank near ECU
Mine was a little rusty....
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(05-05-2020, 09:47 AM)Cormanus_imp Wrote: I'm a bit with Houtman. I could look at that video for a week and be none the wiser. Still, it remains interesting that this issue continues and you guys continue to learn about it.
I noticed that Max apologised earlier for posting things in a great deal of detail that some may not be interested in. No apology is necessary, Max. One of the excellent things about this forum is the way people pitch in to solve problems. The detail is important if you know what you're talking about. Mechanical klutzes like me can ski over it or choose to follow along in the faint hope we just might learn something.
Thanks again to you all for your continuing efforts.
+1
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(05-05-2020, 08:15 PM)syncronizator_imp Wrote: Speed ... check condition brass connections the ECU and other items to the ground.
This is under tank near ECU
Mine was a little rusty....
Speed ... check condition brass connections the ECU and other items to the ground.
This is under tank near ECU
Mine was a little rusty....
Mine is not rusty, yet. Thanks!
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By the signals seen in PopGun's recent video (thanks) I would say the pulse train when opening trhottle tries to open the valve, so my low idle issues after opening throttle are not because the IACV has been closed, just it didn't open or didn't open enough.
There is an extra variable I did not think about before. As the valve has not got a feedback the system is calculating the valve position by the number of pulses it is receiving, the more open the more air comes in, the more closed the less air is coming in. The bike hasn't got a MAF sensor, calculates the amount of air by the position of the Throttle Position sensor, the number of revs, the MAP sensor, the IAT sensor and having feedback from the oxygen sensors, as the first Fuel Injection systems. In this bike the IACV is also a variable for the calculation of amount of air, so the air pass section would be the aperture of the Throttle Body (calculated by the voltage through its sensor resistance) plus the aperture of the IACV (calculated by the number of pulses). Then; if the IACV does not respond to the pulses the system still will think the air flow has changed and will change the amount of fuel to maintain the stequiometric mixture 14:1
What happens when you open throttle and a pulse train is given to the valve if the valve does not respond? The air/fuel ratio will be out and also the idle speed. Of course the feedback from the Oxygen Sensors will change the short term fuel trim to adjust the combustion, same as if we had an air leak, but not instantly.
Then my hypothesis is that the idle speed is going down because when the IACV gets a pulse train and it does not respond the fuel ratio gets screwed and then it runs too rich or too lean, then step by step the system corrects it by changing the Short Term Fuel Trim and also actuating again on the IACV, that is why little by little the idle speed goes to normal in 3 or 4 seconds if it does not stall before.
So, further diagnosis required here with a diagnostic machine in order to monitor the Short and Long Fuel Trim when the issue is taking place. May I be wrong?
