930 CIS Injector testing results

Scout012 · Scout012's Garage

I am a new 79 930 owner and had purchased the car after it had sat in a garage for 2-3 years only being started and not really driven. the engine ran with about 75% power at first, i pulled the injectors and replaced the seals in the boost housing which were an obvious leak point. i am currently replacing a few VAC hoses and cleaning up the engine.
Meanwhile i had sent the injectors down to Dave at Jaguar Injector to have them cleaned and tested, I received the results today and am posting them below for feedback.
He is claiming 3 injectors to be good and 3 bad. Another Pelican member has informed me he has two injectors he can send me and i am lookng for a third. Only issue is that i have read that even new injectors can have poor flow, anyone have a reliable source to purchase new injectors that might replace them if they fail a test? I know the Host sells them at retail, any experience with returning failed ones?
I plan to have the new one tested by Dave also.
Any input is appreciated!

Bob Kontak · Bob Kontak's Garage

Engine Builders Supply does or used to sell flow matched injectors. They are used but they are tight as far as the variance among them.

I would not sweat whether a new one would be bad. If you have it (them) tested and it fails PP will square up with you.

RatBox · 05:56 PM

I know your test is noted post cleaning. But if they were good to start . And cleaned properly , I do not see how they would vary after. So regarding cleaning....

Bosch CIS injectors can be cleaned ...i'm speaking of CIS in general for all systems no matter on what make. In normal times (days of old) . This is what was done if a CIS injector was dirty (did not have a good spray pattern).

There is a small machine (non-electric , a hand actuated pump) . Pumps mineral spirits thru the injector. A few pumps, & you can see the spray become a nice pattern if not clean to start.

Another tip. If ever in search of a Bosch CIS injector (especially BMW). Do not go by what the factory tells you as far as part numbers. Go by the BOSCH number. For example , BMW marks all their injectors with a differant BMW part number for every year & model. Even if it is the exact same unit.