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Like Eric says, don't condemn the new injectors. Unscrew the retaining clamp on all four injectors and carefully pull the injectors out of their holders while still clamped to the fuel rail. Pull the injectors far enough out of the holders that you can see the tips of the injectors. Briefly power up the fuel pump to pressurize the fuel rail. Do not crank the engine. Check for gasoline dripping from the injector tips. It will be obvious if one or more of the injectors is leaking.
If you installed new injectors on a car that had a fuel system filled with ancient gasoline, particulate contaminants in the gasoline may have entered the injectors resulting in the injectors failing to close when they are turned off.
The Bosch 036 injectors have a coil resistance of about 2.3 - 2.4 ohms. The Beck Arnley injector resistance is identical. Both injectors are meant to be used with external resistors that limit the injector current to about 1.2 amps. Open the D jet controller and you will find internal power resistors for the injectors which do the current limiting. I think they are 6 ohms. 12v/(2.4 +6) = 1.15 amps. (1.15 amps) x 2.4 ohms = 2.8 volts across the injector when opened. The BA injectors work just fine.
Dielectric grease is an electrical insulator. It does not improve electrical connections, it only helps to prevent corrosion on the electrical connections. You need to clean the connections and make sure they are good before coating with grease to prevent future corrosion. Applying dielectric grease to a bad connection may only make it worse.
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