Injectors

[Millie01]

Typical. I get to 60,150 miles and something breaks.

One of the injectors won't run cleanly for the first few minutes but not long enough for the garage to establish which injector it is. They can only start the engine once a day (apparently) in order to repeat the symptom. A new injector has been ordered and will be fitted. In which case it could take up to four days before they discover which is the faulty one presumably.

Unless anyone has a better idea?

It's the first time anything has gone wrong with my last three Octavias. Will Skoda allow a claim on the expired warranty?

Dilly

[Railroad]

You would be better off taking your car to a good diesel fuel injection specialist. Assuming of course your car is a diesel because you haven't said. Diesel Common Rail fuel injectors are set up very precisely because of the multiple phases of injection. Each injector once set up is given a code. This must be programmed into the ECM so that it knows how to operate each injector correctly. Diesel specialists will be equipped to diagnose, test and repair injectors. Most garages are not.

[octyal]

Easy to find which one for someone who knows what they are doing - do a leak off test at the beginning of Day 1, decide which injector, replace and code it, car back by end of Day 1.

[Railroad]

Assuming of course that excessive leak off is the cause, which it may not be. There are a number of possible faults that could occur with fuel injectors, excessive leak off being just one.

[octyal]

Assuming of course that excessive leak off is the cause, which it may not be. There are a number of possible faults that could occur with fuel injectors, excessive leak off being just one.

True, but if it isn't running cleanly then that would give a low flow rate

[Millie01]

Thank you everyone.

You are quite right - it is a 2 litre diesel DSG.

I have used an excellent diesel specialist for our elderly Nissan but I would like Skoda to consider this as a warranty matter given the mileage and my history with the company. This is my 4th Octavia.

I am afraid I don't know what "excessive leak off" is, so cannot comment. Unfortunately, the engine clears itself so quickly that I think the garage is unable to do any meaningful tests

Dill

[Railroad]

Injector leak off is fuel that is supplied to the injector but is not injected and returned to the fuel tank. The small pipes on the top of the injectors carry unused fuel to the return. The most likely cause of one injector having excessive leak off is a partially blocked nozzle. You say that the garage suspect a faulty injector, but are you sure that's right? Is the engine misfiring, even for a short while? A loss of compression or a sticky valve or valve lifter could also be the cause.