w_hari

Hi.

Since I have troubles with my engine swap I measured the impedance of my injectors. And they seem to be low impedance - although I expected high impedance on the 91 TII car. The injectors have the original oval plug and fit to the original harness. So I dont know if they are aftermarket injectors and where exchanged from the previous owner.
What I remarked is that they dont have a black coating like all the other pre 88 injectors I saw. So maybe anybody can tell me or has a picture of how the original 91 high imp injectors look like - especially black coating or not?

thanks,

Harry

1987RX7guy

iTrader: (3)

S5 Injectors are Grey coated. What part number is on the side of the injectors and what ohm reading did you get?

w_hari

Mine are definitly not gray coated - they are really shiny and I read about 2-3 Ohms. Where on the ECU do I have to measure to see if it gets the correct high impedance and do I have to measure a pin against mass?

Harry

1987RX7guy

iTrader: (3)

The Pinout image is in the FSM i'll see if I can find it for you. You can get the FSM at iluvmyrx7.com for your reference....

1987RX7guy

iTrader: (3)

S5 FSM 04B Page 80 of 89


Pins 3W, X, Y, Z

w_hari

and I do have to meassure against mass?

thanks a lot!

Harry

w_hari

Ok. I measured the pins at the ECU and they all read about 30 Ohms. So I guess thats ok and I dont have to do anything - right?!

Harry

1987RX7guy

iTrader: (3)

30ohms? i thought high imp was ~11-13ohm :o

HAILERS

Your going to have to do it another way. Measure from the ECU plug/socket, for a given injector to the Main Relay. It would be the four socket plug on the Main Relay. The Black/Yellow wire.

That's part guess. I don't have a series five schematic, but I bet the series five and four both feed the injectors from the Black/Yellow wire on the Main Relay plug.

slpin

iTrader: (9)

my high impedence injectors measured 47-50

HAILERS

It should be 10-12 ohms for high resistance injectors and 2 to 2.2 ohms for low resistance injectors.

slpin

iTrader: (9)

hehe yup,
thats why i ordered a set of new injectors