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View Full Version : RB25 S13 no spark issue


Michaelwinne
10-08-2012, 07:11 PM
Alright guys I'm having another problem, I ditched the Chase Bays harness and picked up someone elses homemade wiring harness and ECU combo that came out of a running car(or so they say). I tossed everything in the car and turned the key and voila! the ECU lit up(a signal that I have yet to see with this swap), turned it to start and nothing. The starter wouldn't turn over. So I ran a hot wire to the solenoid with the key in the on position, can see the fuel lines jumping, and when I run the starter through, it doesn't start.

I pulled off one of the coil pack plug and hooked it up to a spare pack and spark plug, and nothing, no spark. I have the coil pack harness grounded, the wiring harness grounded to the intake mani, and the block grounded to the chassis. I checked power to the coils and I have 12v and a good ground to all coils, but I do not know how to check the signal wires.

I have a spare ignitor and tried both and no change, and I have a spare CAS and tried it and no change.

If someone could tell me how to check all the signal wires for the coils I will do that, or if you have any other ideas please help me out! I've been trying to get this car started for months and I just can't figure it out. I'm pretty sure all my fuses and relays are good, the wiring harness was missing the two relays, ECCS and IGN relays I believe, but I managed to find a couple that are both 30 amp 12v relays so I imagine that they work fine. If anyone has any questions or ideas please help me out!! Thanks for reading all this if you made it this far!

fliprayzin240sx
10-08-2012, 08:51 PM
Jeez, good luck Mike, just got mine up and running this weekend. I ended up going with WS pre-made harness and car started up within 5 seconds of the initial crank up.

Michaelwinne
10-08-2012, 08:56 PM
Thanks man I should've gotten a WS one but for $300 I got a harness and ECU from a running car, or so the guy says lol

Michaelwinne
10-09-2012, 10:22 AM
No ideas guys??

Michaelwinne
10-09-2012, 10:30 PM
Bump it up! There's gotta be some ppl out there with wiring experience with RB25s that have some ideas!

bkt808
10-10-2012, 12:21 PM
s1 or s2? do you have the correct coil packs?

Michaelwinne
10-10-2012, 01:00 PM
It's a S1 engine. I do have series 1 coils with 2 different ignitors.

Sileighty_85
10-17-2012, 01:19 AM
if you jump the stater you need to turn the key at the same time and it should run.