Checking Injector Resistance w/out pulling intake?

[jmgtp]

Way back when I had a 3.1 Beretta I was able to check the resistance of the injectors at a connector on the injector harness. By reading the resistance there I would at least know if I had a bad injector somewhere or not.

Now, on my LX9 swapped Grand Prix, I'm going through the tuning process and its better than where it started but the thing is so down on power that I want to check the injectors to be sure that I don't have a bad one or possibly one that is not plugged into to its harness. But, my wiring harness (a modified 3.4 dohc harness) doesn't have the connector like my 3.1 did. The fuel injector wiring goes right into the bundle and to the ecm.

If I pulled the harnesses out of the ecm can I measure injector resistance there at two of the pins? I'm trying to avoid pulling the manifold since I don't want to buy new gaskets.

[robertisaar]

if you did that, you would collectively measure ALL of the injectors on the circuit... and let's say one injector on the circuit is perfect, another has significantly higher resistance, and the last has significantly lower resistance, it could all combine to LOOK like they're good, but obviously they're bad....

[jmgtp]

True, but if I try it there is still a possibility that I can identify a discrepancy and then pull the manifold and identify which injector.

I do get what your saying, one high by X amount and the other low by X amount would be a wash and I wouldn't see that anything is wrong on the meter.

[robertisaar]

should you want to try it, assuming just 3 are on a circuit, you should see ~4 ohms, if they're all in spec. if all 6 are connected to the same circuit, then ~ 2ohms.

if my math is right anyways.