E28 Master of diguises 0 Report post Posted June 17, 2008 hey there is there anybody within this fraternity of bmw lovers that know any information regarding the Kjettronic fuel injection units on the older 5 series car's i have taken my car into a mechanic that worked on BMW's in his life time to try and solve the problem with my car after doing a compression test and rigorous checks on the car he had narrowed it down to the sole problem being the fuel injection unit on my car the compression test ruled out that 2 of the 6 cyl had low compression and later found a vacum leak etc. but what i would like to know if there is anybody that could help me out with any information or places that i could take my car to? Quote Share this post Link to post Share on other sites
QuickSilver 0 Report post Posted June 17, 2008 Botanymotorworx. Glenn knows his stuff. Take it there. Quote Share this post Link to post Share on other sites
*Glenn* 854 Report post Posted June 17, 2008 (edited) What is the actual problem ?? If the mechanic has narrowed it down to the divider head being faulty....these cannot be repaired. You could try a carbon clean machine on it to clear internal galleries. We fixed an Audi with a carbon clean a few months back, it had Kjet too. Do you get fuel pressure to all injectors ? and have the injectors been checked ??... waste of time cleaning these types of injectors if the crack pressure and spray patterns are wrong you need to replace them. But without doing other checks first, I wouldnt go there yet. Has a cylinder leak test, manifold vacuum check been done ?? Have valve clearances been checked ?? Also check distributor cap & rotor and check that the divider head flap is not sticking.... the list goes on......... Edit: BTW Kjet injectors should crack open at approx 2bar pressure and spray properly up to 11bar. Bringing the pressure down, they should continue to spray down to about 1.8-9 bar, then close and not leak. They should have a good spray pattern and not squirt or spray sideways. Unfortunately I have sold my Kjet injector tester to Peter at Motor Service in Panmure as the older Mercedes vehicles use Kjet. Other types of injector flow benches may be able to test these for you, however the operator will need a "brain" too. You can try Blair at Woodhead Electrical in Panmure for a carbon clean. Edited June 17, 2008 by botanymotorworx Quote Share this post Link to post Share on other sites
