1984 500 SEL fuel injectors ?

[dloveless]

Although all new injectors, I've heard of getting defective one(s). Is there a test to determine if injector(s) are good??

History: Had car for 16 months. 130K miles. Did top end rebuild. Been chasing down idle problem (was too high now right rpm but really rough idle and quits eventually).

Did the following: installed rebuilt Fuel Distr, warm up reg, cold start valve, idle control valve, idle control module, air distrib hoses and vac lines and connectors, new throttle switch and coolant and oil temp sensors (and new injectors).

In short, hard to think of cause of rough idle problem.

the printed engine manual diagnosis keeps pointing me to "renew idle control module". I've put a rebuilt in and finally a new one. And checked for continuity from the Idle control module wires this past weekend. All OK.

Thanks in advance for any suggestions.