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Brok3n_RB25
12-11-2010, 03:30 PM
Hey guys. I'm relatively new posting wise on this forum. I've trolled it for months now, but never really got active. I'm having an issue with my RB swap. I'm at the last leg of getting it running, but my injectors aren't firing. I've tried testing the CAS. I swapped it when one didn't work. Still no success. I've checked all the ground signal wires to the ECU. They're all good. They have power, but for some reason... they aren't getting the signal from the ECU to ground. I checked my ECCS relays even though I wasn't sure they had anything to do with the injector circuit. The injectors all ohm test good. My CEL is on with the key on, but turns off with cranking. So, that SHOULD be ok. Not 100%. Any help on where to look next would be appreciated. Thanks.
Sileighty_85
12-11-2010, 03:51 PM
you make it sound like the Injector Main harness isnt connected
Brok3n_RB25
12-11-2010, 05:38 PM
It's all connected. It's just not getting ground signal. I disconnected it to check for the +12v constant power and to check continuity to the ECU. Then, I reconnected it.
username
12-12-2010, 01:15 AM
i just had this exact problem with my car and it can be 3 different things: fried injector driver in the ecu (bad ecu), bad injectors, or a bad injector harness. I ended up having a bad injector harness and 6, yes 6 bad injectors but somehow all my coils only ohmed out to .3-.6 so they were bad. You said you checked yours which leaves a bad ecu or bad injector harness. I have a spare good ecu if you need one.
Brok3n_RB25
12-12-2010, 01:42 AM
Send me a text. I think that the ECU might be the source of my problems.
8502187988. Casey
Brok3n_RB25
12-12-2010, 07:48 PM
Ok guys. I found a bad ground and fixed it. Now I'm having troubles with getting the car to fully fire up. It's sputtering and then dying. I'm thinking that the CAS needs to be timed for it to fire up. Any advice?
Brok3n_RB25
12-13-2010, 12:09 AM
Alright. Narrowed it down to the MAF. For some reason the signal wire is showing 9.5v. With the MAF unplugged it starts, but it idles like shit. I tested the MAF off the car with the 12v FSM test. It gets like 300mv on the signal wire. How the f***? bad MAF?
modulation
12-17-2010, 02:45 PM
Alright. Narrowed it down to the MAF. For some reason the signal wire is showing 9.5v. With the MAF unplugged it starts, but it idles like shit. I tested the MAF off the car with the 12v FSM test. It gets like 300mv on the signal wire. How the f***? bad MAF?

Signal from MAF should be 0-5v.
Are you sure you have the correct wiring harness/pinout matched?