I've done alot of research on this subject but still can't exactly figure out what I have.
My car was made in 07/88.
I took these injectors out of my NA engine. They have orange tops and a sqare connector with a centered notch. When they were out of the car I measured resistance of 12 Ohms (high impedance).

from this info from rotaryressurection.com :
Year type impedance plug style plug notch position flow rating color part number
•• 84-85 13B NT low square center 680cc orange 195500-0900
•• 86-87 13B NT low square center 460cc red 195500-1350
•• 86-87 13BT low square center 550cc tan 195500-1370
•• 88 13B NT high square offset 460cc purple 195500-1350
•• 88 13BT high square offset 550cc purple 195500-1370
•• 89-91 13B NT high oval center 460cc red 195500-2010
•• 89-91 13BT high oval center 550cc purple 195500-2020

from this list it would seem to me that i have the
84-85 13B NT low square center 680cc orange 195500-0900
But heres my problem.... it says they should be low impedance (2-3 Ohms)....

So really...... My injectors don't actually match up with ANY in the list.

Can anyone tell me, or give any direction for me to find what injectors I really have???
I posted a pic if it helps at all (sorry for the quality, flashlight and a camera phone trying to get under my manifold)

 

What is the Injector part Number you have??..It is on the side of the injector..other side says denso.
You'd have HI impedance injectors on an 88 as the wiring harness has no connector to hook up to a resistor pack( under the stock air box..looks like a silver box,with a big *** connector on it).
Color Fades with age on the injectors,so the 680s would be Sort of Tan in color now.

 

The injectors are in the car right now so its tough to get the part number. I guess if I really want to be sure, I'm gonna have to get at them.
The wiring harness IS set up for high impedance, it has no resistor pack.
As you can see in the picture, they are a pretty bright orange, do you think maybe these are aftermarket injectors of some kind? I just bought the car a few months ago and dont really know what the previous owner did to the car

 

they look like mazda/ND injectors

you really need to check the number as i have early s4 low ohm NA injectors ( 1350 ) that have faded to the same colour
the purple and tan ones also get colour confusion as they age

the centre notch screams low ohming injector, and if so you need to ballast the wiring with a 10 ohm resister in series for each injector
( if it is not already there )
- or mod the loom and fit the 86-87 ballast resister pack

 

Is there any reason to believe that the injectors in your car are not supposed to be there?

 

I measured the resistance and got 12 Ohms on all the injectors... if they were low ohm shouldnt they read between 2 and 3?

I know the car did have some changes to the fuel system, I'm not sure what though because it was done by the second owner before me.

 

AFAIK all centre notch EV1 type connector injectors are low ohms , deliberately so
at least the 20 or so 83-87 mazda/ND centre notch ones in my bucket are all low ohms

did you measure the wiring included,, or the injector with nothing attached to it?

 

I measured the injector by itself, not attached to the wire

 

As I was taking my throttle body off today I got a good enough angle to get the part number.195500-1350. Turns out these are the stock injectors and have simply faded from purple to orange.....? seems really strange to me but I guess it can happen :P

 

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