Diesel fuel injectors - Need to replace?

Does one injector on a diesel failing stop it running?

Do you know why it failed? Was it just blocked if so perhaps a injector cleaner added to your fuel would help prevent another failure.

Yes on this car it did. The AA had to remove the car from the M40 hard shoulder and take it to a service station where they fitted a replacement part.

Unfortunately I don't know why it failed. The AA said the car was prone to injector failures.

VW injectors must be the first ones that suck rather than blowing (*)

They're not reliable, and will require replacement far too early. However there's no good reason to spend money on doing all of them, as the failures aren't linked. Shopping around will get the price down a bit, and recon ones (which are just as good as new!) are about £120. DIY fit isn't hard.

(*) Of course not. We had diesel Mk2 Transits! Nothing's that bad.

What was wrong with the York or 2.5 DI? I had a DI that went a couple of times around the clock. Its demise was its body!

I have had three fail on my Jetta, it's an expensive hobby. My local garage say there is no rhyme or reason, it's pot lock :-( VW deny any responsibility, but these siemens injectors seem to have a high failure rate. It's a lot of money to lay out given that the replacements are as likely fail as the originals.

Cost benefit analysis suggests, no its unlikely considering the number of engines of this design in use. I'm of course not a driver but unless it is a fault which is actually going to be a danger, then its not an assume, since if it were the whole world would know about it by now!

Brian

The basic rule of thumb is that if the labour to replace one costs more than the other three, replace the lot. But if the AA replaced em by the roadside, they cant be that inaccessible.

AFAICT it just take one bit of random grit to ruin one, so its not wear related. Its just 'sometimes they just fail'

Oil pump drive could shear through.

Mostly though it was the injection pump and injectors. They just didn't last and had to be rebuilt. It got so bad that we tooled up with an injector tester and were doing them ourselves (Which meant me, earning myself some pocket money).

I wasn't aware of those issues. My only serious problem was the timing belt nicely stripped itself of it's teeth when trying to start. Cost me a pushrod and rocker. The replacement belt cost more!