spegru
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| posted on 7/11/24 at 09:38 PM |
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AJ30 / Duratec v6 - ECU setup details
I know there are a number of threads on this subject but so far Ive not been able to get my AJ30 running properly:
I'm using a MotorSport Electronics ME360 ECU
First Question - Trigger Offset: THE ECU needs to know what angle the crank shaft sensor is at and it seems that the AJ30's is not at TDC. Nor
are there any markings on the front pulley.
So I went through the following rigmarole:
a) Mark the pulley with tippex to get distance angles using my calculations based on its circumference and
b) discovered actual TDC using a screwdriver down the spark plug hole.
c) I then managed to get a timing light working (even though there are no plug leads) to find the trigger point.
According to all that, it appears that the trigger is 302 degrees after TDC which is of course 58 degrees before TDC.
I cant be all that much out because the engine does run - albeit extremely roughly
I write all the above because in spite of researching the forum here I was surprised not to be able to find this crucial figure and so I do wonder if
Ive somehow got something wrong?
Check out Invader Garage on Youtube
https://www.youtube.com/channel/UC3C55qk-tbKc0WjmxGqFoXg
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40inches
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| posted on 8/11/24 at 12:20 PM |
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quote:
Originally posted by spegru
I know there are a number of threads on this subject but so far Ive not been able to get my AJ30 running properly:
I'm using a MotorSport Electronics ME360 ECU
First Question - Trigger Offset: THE ECU needs to know what angle the crank shaft sensor is at and it seems that the AJ30's is not at TDC. Nor
are there any markings on the front pulley.
Looks like it is 50 degrees btdc
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spegru
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| posted on 8/11/24 at 02:30 PM |
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Interesting.
I suppose this is MegaSquirt/Jolt? I also assume you are using the built in sensor, not an external sensor/wheel?
This Setting in the ME360 MEITE setup software is degrees after TDC so my 302 figure corresponds to 58deg BTDC, which is 8 degrees different to your
figure.
That may not matter - if it's all taken care of in the timing tables, which presumably could be 8 degrees different
On the other hand, MSE have downloaded an initial timing setup to me that may or may not use that same offset (they didnt have a figure available for
the AJ30)
I wonder what would happen if I change it to 310?
hmm thanks
[Edited on 8/11/24 by spegru]
Check out Invader Garage on Youtube
https://www.youtube.com/channel/UC3C55qk-tbKc0WjmxGqFoXg
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MikeR
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| posted on 8/11/24 at 03:43 PM |
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Are you both triggering on the same tooth edge - the teeth edges are 10 degrees apart so you could in reality be 2 degrees different.
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spegru
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| posted on 8/11/24 at 06:43 PM |
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Oh dear I actually dont know the answer to that important question.
As much as 10 degrees?! I am surprised its as much as that with the internal teeth (or whatever they are)
Certainly 2degrees would be within margin of error
The thing is running so roughly that Ive been trying everything without success and it makes little difference so far
This afternoon I even tried altering to 310 ATDC to match the 50 BTDC mentioned above and even that made no real difference
And now I cant be sure what I was using to get the offset in the first place!
I shall have to go back and check it all again no doubt.
In the mean time I suspect a faulty crank sensor so Ive got one on order..
Thanks for those comments!
Check out Invader Garage on Youtube
https://www.youtube.com/channel/UC3C55qk-tbKc0WjmxGqFoXg
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