[skyship007]

Originally Posted by Joe H

I have a misfire on cylinder 5 that may be an injector.

Can anyone point me to a company that will test it?

Or, an obvious thing would be to swap two injectors around and see if the misfire follows the injector. I know that the high pressure metal pipe should not be re-used but in practice can I get away with it just for testing purposes?
If so do the injectors need to be coded to the ecu?

It's a XC70 2006 D5 (185).

Thanks
Joe

When is the cylinder misfiring ??

I would clean the intake and EGR (New O ring and gasket), change the fuel filter and fill the housing with Liqui Moly Diesel Purge (Read the instructions about varying the idle RPM), then take it for a Sunday morning motorway session or Italian tune up.
Also remove all the fuel injection system connectors, spray with contact cleaner and refit, just in case the misfire is electrical.

As a general rule I would never touch the injectors until after changing the fuel filter, using a direct feed injection cleaner and doing some WOT time, unless one was obviously leaking from a blown seal or cracked feed.