Diesel injectors....coding

[magpie215]

Im fairly competent at diy spannering but not really diesel savvy.

Does this have to be done say if I fitted a good used unit off another engine of the same type?

When we say "coding" do we really mean "calibration to the cylinder its installed on"

If I did fit one and didnt code it would we say it will be ok and run/cure fault but wouldnt be optimal fuelling.

Thanks

Edited by magpie215 on Thursday 10th January 19:32

[GreenV8S]

magpie215 said:

When we say "coding" do we really mean "calibration to the cylinder its installed on"

I've never done it but when I hear of people doing it I assume that is what they mean.

[DrDeAtH]

I've never coded them in(ford tdci) , and that was on the advice of the diesel engineer that sold them.
He said that the ECU will work it out after a while. Just do the pilot learn.

A second hand unit will have some wear anyway, thus the offset given by coding in won't be completely correct.

[Megaflow]

If fitting new ones, it really should be done. But, as others said, with second hand ones, not really worth bothering with.

[northwestrecovery]

Some need coding some don't , depends on the ecu / system / car . If it says code them code them ,it's done for a reason .

[snapdragon69]

They are calibrated for response times and quantities at the factory.
Of course you 'should' do it but it will work if you don't, but emission/noise may be higher until it self-adapts (regulatory is the primary reason).
If they are used and hence worn, it is moot anyway.