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View Full Version : RB25 starting issue! No spark!


Michaelwinne
08-06-2012, 12:49 AM
Alright I'm still stuck and no one helped me out so I'm gonna make another thread and see if I can get anywhere. I'm finishing up my RB25 swap into my S13, and I go to fire it up and.. nothing. So I start checking it all out. Fuel pump is good, I pulled the CAS off and spun it by hand and I can hear the injectos pulsing. I moved onto spark, pulled the plugs and there was fuel on every plug. I used a multimeter to check the voltage at the plug and I get 12v. I checked the continuity as much as I could figure out from the wires going to the coils and CAS and they all are continuous back to the ECU. It is a series 1 RB25 and I have replaced the ignitor and purchased 6 more coil packs so I don't think those are an issue. The only thing I am unsure about is my ECU, I don't know how to check and see if it's good or not and I think the guy said it was a series 2 when I bought it, but Ive heard it didn't matter. I also am unsure about my grounds, I have a Chase Bays wiring harness and it is grounded to the intake mani, I have a big ass ground wire going from the block to the strut tower, and some smaller grounds from the intake mani to the firewall just to be safe. So needless to say I'm stuck. I'm leaning toward needing a new ECU but wanted to see if anyone had any other ideas before I went out and bought a new one. If you read all of this thanks for getting this far and thanks in advance for any help! I need it!

Detroit.Tee.Tee
08-08-2012, 06:00 PM
Post the numbers on the ECU please. Also, the 2 character code.