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ShaneWJ  ShaneWJ is offline
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Default Elm327 injector learn

Hi,

Can you relearn the injectors to pull the values in line abit? A relearn is a common thing that is done at most services for common rails these days.

Anyone done this with the elm327?

And are these numbers supposed to be the same as the large number in the circle on top of the injectors?


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I'd expect these values are, or should be the same as the classification value on the top on the injector (the number in the circle).

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Would it make a big difference in the operation of things?

My injectors are 1,2,1,2,1
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My understanding is each injector when manufactured and flow tested has a small variation from ideal flow rates due manufacturing tolerances this variation is quantified and marked with a specific identifier on the injector.
So when they are installed the ECU is coded with the variation of each injector in its learning procedure so its software and can adjust so theoretically at least each cylinder see identical fuel flow and make identical power and emissions.

This learn procedure makes no adjustment for the fuel flow changes due to wear in use, but theoretically they should all wear at approx the same rate. Some CRD diesel makers like Mitsubishi require the engine and injectors do a relearn about every 30,000kms to compensate for wear of the injectors.

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Quote:
Originally Posted by ShaneWJ View Post
Would it make a big difference in the operation of things?

My injectors are 1,2,1,2,1
In my opinion and experience, the answer is yes. I'd try changing the values the ECU is aware of.

When I replaced my injectors a reclassification made a noticeable difference to smoothness and power.


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My injectors 4-5 are on the way out so I'm kind of grasping at straws here.

Anyone know what the dealer charges to change these?
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I was quoted $2000 to reseat all 5 of my original injectors.
It can be a fiddly and time consuming job, so most of that quote was for labour.
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