Thread: Fuel pump re-learn not working

Not sure if this will be of use, but I recently had the same thing with a suspect vcv and what I called noisy injectors... I got the vcv replaced and then had to return back to the mechanics to have my exhaust manifold replaced and this is when I enquired about the noise of the injectors... The mechanics did the the Pump and injector pilot relearn and they informed that mine took quite few goes and even then it didn't reach 100% as I understand it. They informed me that this "may" be a sign that the injectors are reaching their end of life (175k on the clock) - I'm hoping they're incorrect and in the meantime will be using some fuel additive that I've had success with before to hopefully extend life... Anyway, I went down to pick my car up and the rattly injector noise was gone and it drove better than before so I'm currently happy with that... Just hope I get a lot more LIFE from the injectors...

as I said this may be of no help but that's my experience...

I frequently have this issue. Last one I did however worked first try!. There is known problems with relearn procedures on these Puma pumps....

Jc

Firstly, I presume there were no DTCs? Some codes stop the re-learn.

Then, is the car re-mapped? I couldn't get a re-learn to work until I flashed the map back to standard.

@Rob Mine has 150,000 and hope the injectors are not on the way out.
@Justin Sound like I should keep asking them to try again each time I go in.
@Skidrov It has just been re mapped, but they tried twice before the re map was done.

The relearn has to be done with a certain number of conditions that need to be met, a faulty brake pedal switch etc or insufficient coolant temps etc need to be isolated and rectified first. Plus there is also simple issues like poor comms to the port etc. I usually have at least 3 attempts using Autologic, some first time, and 1 actually never learnt, I'm not certain yet if the dealer was able to, I must get back to them and see...

have them check the can bus both high and low for noise.

plug a crow in and watch the high/low level voltages and the shape of the bus singals.

if their not nice the relearn will be aborting from lost packages. there isnt a fail code for this.

@blknight
I’ll get them to read your post next time I take it in. The re-lean is aborting with no fault code.

Does the reset needs to be done at a Land Rover garage with Land Rover software or could any garage with a fancy computer do it ?