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Edited by gdudu, 21 February 2018 - 09:40 PM.
Best Answer gdudu , 27 October 2018 - 10:48 AM
Hello
Good new, the technical control for pollution was OK, The CO was about 0.3
Bad news :
The technical control was not accepted cause of oil drops. The new rules don't accep this, and the techicien told me that with an english car it would be impossible ....
And now, I have a problem when I accelerate : there is a big hole and the motor loses all power and frequently stalls
I have reseted the ECU with readmems (readmems.exe com3 interactive and OxFA), but this is the same
I have made a little log file attached
Go to the full postPosted 21 February 2018 - 07:33 PM
Edited by gdudu, 21 February 2018 - 09:40 PM.
Posted 21 February 2018 - 10:21 PM
The problem with temperature sensors is usually the connector on the loom and not the sensor itself. I assume you have changed the air filter but is it a good quality one?
The only thing I see on the graphs is that the ignition advance max is about 30 deg. where I would expect the max on most minis to be about 36 deg.
Posted 21 February 2018 - 11:10 PM
Hi, thanks
No I didn't change the air filter now, I've changed it last year, buy to Datch.fr, I assume this is a normal filter
In France, for this year of vehicle (1995), the limit of CO is 0,3, and I have 0,4 after 3 longs try. The car was hot
The pictures I posted was a cool test, without going too fast
I've made another test with more power, and the max igniton advance is 36,5 deg
After some reads , I think I have a little problem with Intake air temp. It should be 35 °C. But can this explain my results ?
Posted 21 February 2018 - 11:37 PM
Posted 22 February 2018 - 06:49 AM
Hi,when you have readmems, you could download memsanalyser and logger from rmrsoft.com. Try this software.
Like sprocket mentioned, check the idle speed. and check the purge valve if it closes on idle.It should open when over 75degree.
Posted 22 February 2018 - 10:08 AM
Hi, thanks
No I didn't change the air filter now, I've changed it last year, buy to Datch.fr, I assume this is a normal filter
In France, for this year of vehicle (1995), the limit of CO is 0,3, and I have 0,4 after 3 longs try. The car was hot
The pictures I posted was a cool test, without going too fast
I've made another test with more power, and the max igniton advance is 36,5 deg
After some reads , I think I have a little problem with Intake air temp. It should be 35 °C. But can this explain my results ?
Posted 22 February 2018 - 11:45 AM
Edited by Sprocket, 22 February 2018 - 11:46 AM.
Posted 22 February 2018 - 02:05 PM
What we need is data from an idling engine with high resolution and indication on the time axis. That is where you problem lies.
Data logging means nothing if you do not capture the areas you are interested in. Resolution matters for example, the lambda sensor fluctuates at maybe 1 or 2 hz, data capture at 2 second intervals You miss most of the data you are interested in.
On a side note, what are the other emission gas readings? CO is only one, there are five.
CO
O2
CO2
HC (hydrocarbons)
NOX (not always measured depending on equipment)
Lambda value important too but is a calculated value rather than a measured gas.
I will post up the Rover emission check sheet later if someone doesnt do it before then, but you will need all the data mentioned above to use the check sheet accordingly.
As modern fuel systems become more and more complicated, there is becoming less and less need for garages to rely on exhaust gas measurements other than the basic readings, which the technicians now dont really seem to understand how to use that information. They are just looking at what a computer is telling them.
4 or 5 gas analysis seems to have fallen by the way side, but when used accordingly can narrow down the problem to just a few things. What goes in must come out. Understanding the chemical reactions and where they take place (combustion in the cylinder or reduction/ conversion in the catalytic converter) doesnt have to require a degree in chemistry.
Having the data from the ECU is still only one part of the picture I have to agree, the development work done so far with the latest pc based softwares having cracked MEMS diagnostics wide open from Rover Testbook, is amazing!! But 4 or 5 exhaust gas analysis is the final piece of the puzzle......
Posted 22 February 2018 - 04:16 PM
Posted 22 February 2018 - 04:43 PM
Hi,
Thanks for all the responses !!!! Too speed for me, and I have some difficults to understand your strange langage
I put data on Excel, only cause I like to understand what I read. Now, I know, then will go back with MemsAnalyser to make a try, at iddle, with a warm motor
I give you what I read on the controller paper :
At a speed iddle :
CO O,50
Lambda 1,000
CO2 14,9
O2 0,26
ppm vol HC 0020
At normal iddle :
CO O,51
CO2 14,7
O2 0,26
ppm vol HC 0243
For the intake air temp, last week (after technical control and before my recordings data) I have broken a little yellow pipe between air filter and somewhere I don't know. I have to replace it. Pearhaps it cause wrong air temp.
I will make a good recording soon and will post result here
Thanks
Edited by gdudu, 15 March 2018 - 08:51 AM.
Posted 22 February 2018 - 07:17 PM
Posted 23 February 2018 - 01:14 AM
Sorry, quality is a bit fuzzy.
Edited by Sprocket, 23 February 2018 - 01:15 AM.
Posted 23 February 2018 - 05:52 AM
Posted 23 February 2018 - 10:05 AM
Edited by gdudu, 23 February 2018 - 05:24 PM.
Posted 23 February 2018 - 03:37 PM
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