I just purchased some used injectors, but I can't figure out which ones are which.

They are supposed to be 1680cc secondaries and 720cc primaries.

One type is all black
One type is black on the bottom half and grey on the top half

The all black type says Siemens DEKA
and the grey and black type does not have any lettering.

The electrical connections look to be the same. Any idea on which is which?

Also, I have a KG primary rail, and a rotary extreme secondary. I found the following instructions for KG rails, is the rotary extreme secondary the same as KG's?

And do I really just remove the grommets and use the slivers of 5/8 hose as recommended in the instructions? Or does anyone have a better method Instructions link click me

 

The all black siemens are the 720's, the 1680's are a bosch injector.

 

Get them cleaned and flow tested. It will be win-win for you. You find out exactly what size they are and know they are working properly. I would never run used injectors without getting them tested first.

 

Thanks for the info. I'll make sure to get them cleaned and tested.

Any thoughts on the installation instructions I posted above?