Hello all,

I want to test the operation of my Regina Fuel Injectors on my 1989 740 GL. Is the procedure as simple as pulling the injectors from the manifold still attached to the rail, turn the key to start and watch for spray pattern in small plastic cups?? Is that the correct procedure?

Thanks, John

Hi John,

Of 9 bricks only one of ours has Regina. So far the fuel system has been flawless, making me wonder why so many bash it next to the Bosch. Why do I know Bosch so well and Regina only in theory? We're always needing to tinker the Bosch.

I can say it is not as simple as you predict. The OBD, if I recall, will do a test mode just like the LH2.4 (Bosch) where it fires the injectors in sequence with a bunch of other outputs, like EGR valves, cold start valves and idle valves according to the application. But during this test there is no line pressure. So first, you'd have to bypass the fuel pump relay to have the pump running before a spray pattern would be seen when trying the OBD output exerciser. Just theory, mind you. No personal experience to relate, but I saw your post going unanswered.
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Art Benstein near Baltimore

Hello,

DO the injectors need to be replaced in the same order? When I replaced them I was getting very high pressure in the 4th injector.

Thanks, John