Injector Coding

[Paulhar99]

Hi All,
I recently had to replace the injectors in my 2008 Transit Connect 1.8cdti and now it won't run, presumably because the injectors need to be coded. Is this something I can do myself as all my local garages want me to bring the van to them.
I've downloaded Forscan, I can get an ODB2 cable and I can read the text on the injector. Will I need anything else or is it straightforward?
Thanks in advance

[GVK]

Van should still run (albeit noisily) without injectors being coded, the coding 'tunes; the pilot injection which makes the engine 'quiet' for a diesel.

You will have air in the system stopping the engine running from the leak off pipes being open while you have replaced the injectors.

You need to get a priming bulb that fits inline with the fuel filter pipework to bleed the system.

(Google delphi priming pump)

But as far as coding the injectors thats all you should need - just be aware which cylinder you're coding , some softwares require firing order rather than cylinder order.

Edited by GVK on Monday 14th July 19:52

[Paulhar99]

Thanks for replying, if I put the old injectors back in then it runs, it won't rev up but it runs. When I put the new ones it it won't start so I don't think it's a fuel bleeding issue. Coding is the only thing I can think of that could be the problem . . .

[paul_c123]

Can you read the fuel pressure on the high pressure rail?

[Paulhar99]

Sorry, don't have the kit for that.

[GVK]

Should be able to do it (read fuel pressure) on Forscan? live data..

[paul_c123]

Paulhar99 said:

Thanks for replying, if I put the old injectors back in then it runs, it won't rev up but it runs. When I put the new ones it it won't start so I don't think it's a fuel bleeding issue. Coding is the only thing I can think of that could be the problem . . .

Is the EML on? Is it in limp mode? You'd need to clear the codes then re-read them, obviously putting the old injector back would re-introduce a fault if it were previously a poor injector issue so its not really a test of a "known good" situation.

[vw_99]

Were they new injectors or 2nd hand?
Sis the part numbers match on the top off them?
At that year some connects/focus could have a 1.8tdci engine or a 1.8tddi engine.

[Paulhar99]

The second set were second hand but supposedly from a running engine. Can't be 100% sure they're not the problem.

[vw_99]

Check the part numbers on top to see if they are the same.

Also when you try and start it is the red alarm light on dash flashing?