What have I done? Please Help!

[Turblown]

Ok... I really need some help troubleshooting a problem!

I did a boost leak test and found a leak around my injectors. So I bought new o-rings, and insulators and installed them on the injectors. Now my car is only running on two injectors!
I tested with my datalogger and found that injectors 3 and 4 are not firing. I verified this once again by simply pulling the injector plugs off of the 3rd and 4th injectors. I'm not sure what values I should be getting but I tested each injector for resistance and each came out to about 8 ohms. I'm assuming that there may be a problem in the wiring harness, but how would this happen all of a sudden?

Where did I go wrong? What do I do to fix this problem? What kind of troubleshooting can I do to narrow down the problem?

PLEASE HELP!!!

 

[Quasimondo]

With old harnesses like that, they're usually fine until you touch them. Did the connectors for the 3rd and 4th cylinder feel properly seated? You might have broken a wire inside of the connector. Try a continuity test at on the harness.

 

[Turblown]

honestly... all of my plugs are pretty crappy... but the 3rd and 4th injectors are no worse than the first two... and I left off the retaining clips for testing purposes and the first two still work. I'm probably going to pick up a noid light (not sure where they sell them) to test for a pulse and then check the line between the injector and the ecu...

Does anyone know what ECU pins (numbers) connect to the injectors?

 

[Quasimondo]

Pins 51, 52, 60, and 61. Check if the injection resistors are blown as well.

 

[Turblown]

Pins 51, 52, 60, and 61. Check if the injection resistors are blown as well.

Sweet... thanks! For future reference... I also found the info here.

Well... I'll do some testing and come back with the results!

 

[Turblown]

Okay... I'm a total idiot... but I figure I'd post an update for future searchers...

Make sure to check your Plug Wire Order when putting everything back together!

Apparently I switched two of the plug wires making both cylinders fail... switched them back and all is well.

 

[oldman]

Okay... I'm a total idiot... but I figure I'd post an update for future searchers...

Make sure to check your Plug Wire Order when putting everything back together!

Apparently I switched two of the plug wires making both cylinders fail... switched them back and all is well.

You dumbass..

 

[Turblown]

You dumbass..

Yeah... I know... the first thing I did when the engine wasn't running correctly was to test the cylinders with my datalogger... I guess I figured that they would all still fire if the plug wires were connected... just not in order... but apparently it doesn't... anyways.