awilson40

I just had a set of used injectors serviced and they did a great job. I was surprised at how much better it ran. But I had one injector leaking around the body. It wouldnt leak at 43 psi but when on boost and the pressure rises, it would leak.
I removed the injector and bench tested...sure enough at around 55 psi, it would leak.
I suggested to the man who serviced them that he should pressure test at around 60 psi for turbo applications just to be sure.
It might be something you would want to suggest to anyone servicing injectors.

hosrom_951

Where did you service yours? i did mine at the Bosch Service Centre, it was cheap (~$50) for cleaning, testing and resealed as well.

painkiller

Funny you should post this, I was thinking of doing the same thing today. My stock ones just got back from flow testing and cleaning. One of them had a body leak and will need replacement. The guy said he sees it occasionally and suspects its from the heat they endure. I'll keep watch on the three old ones until they get upgraded. If your car is hibernating now would be a great time to get this done.

pk

awilson40

From Tim at
http://www.cleaninjectors.com/

I highly recommend him. Very nice guy and fast and reliable service.

ebs

I just did this on my 928. Starts better and runs marginally better too. Money potentially well spent.

K27

I have access to a really good ultrasonic cleaner, is it ok just to throw them in there and then replace the seals ?

painkiller

Check some of the old posts. The injectors need to be electronically pulsed while being flushed to clean them properly. Someone had a write-up about making your own test/clean rig but for me it was easier just to send them out. There is also a small mesh basket filter that sits in the top of the injector that needs replacing along with the seals.

pk

germanturbo

twisting the injectors while removing them can cause them to leak. Not that that's the only cause, but being careful during removal can save your injectors.