RB25DET S2 Coil Packs Go Bye Bye

[Midnight-280Z]

Hey Everyone,

 

So I have an issue. My car was running fine and then all of a sudden it seemed like my 1 of my coil packs just died. Here's exactly what happened.

 

Drove my car to work this morning fine (Roughly about a 30 minute drive and then before turning off my car, let it idle for about 2-3 minutes). Roughly about 9 hours later, I started up the car again. That's when the issue happened. Once I started it up, you could hear the problem. It sounded like a suby. Took the car for a small drive, no more than 2 miles and kept the RPM under 3K. Mostly between 1K-2.5K RPM because I didn't want to push it. The car shakes a bit at low speed/low RPM rev and had that suby sound all the way up to about 2.5K RPM. As I said, I didn't want to push it any further as something is already wrong. I don't see a need to try and push harder than what was needed to hear and feel it out. 

 

I did recently have my plugs changed, and after the change, the car ran a lot smoother so I don't think the problem is related to my plugs. They're gapped at .8mm and are the copper type. $13 I believe was the cost of the plugs and the best damn $13 bucks I spent lol.

 

I lost coil packs before and it was a problem when I was trying to get my car tuned a long time ago. The tuner kept blowing coil packs (Specifically #6, the one closest to the firewall) and it would break up in the high RPMs. He was able to get it to a nice tune and I didn't run into any issues for quite some time until now. Since the car has sat for quite some time, I lost the tune we had. It was done through a Apexi SAFC. So my car should be running how it is stock. My boost is set to a good decent amount, but I have not boosted past 10 PSI since I got the car back up and running. I have also not revved past 5K RPM as well since I got it back up and running (within the last 2 weeks)

 

Does anyone know what the issue could be? The tuner suggested that it could be related to a wiring problem when I had the whole swap done a long time ago. He also suggested that I should consider upgrading coil packs as well but said he wasn't sure if it was such a good idea because if the issue is something else, I might end up blowing the new coils.

 

Engine Info

RB25DET S2 - Stock'ish - FMIC, FPR, Cone filter, Q45 TB, Apexi SAFC, Manual Boost Controller, Bigger Fuel Pump, Freddy Intake Manifold. 

Edited July 24, 2013 by Midnight-280Z

[ZT-R]

I'm not real familiar with the rb25 but does that have an ignitor? that was a common problem on the rb26s. I put aem externail coils to get them out of the heat and ditched the ignitor. 

[helghast7]

For starters, you need to determine if a coil did in fact die, and then identify which coil it is. Once you figure that out I'd swap that pack to a different cylinder to see if the issue travels with it. If it does then you just have another dead coil, stock coils weren't very good anyways. If it doesn't travel then your issue is elsewhere.

 

Once you figure out that stuff, we can take this further, but until then its to difficult to give you a definite answer.

 

If it turns out to be just another dead coil, I'd suggest changing to the ls2 coil setup, its fairly easy to install, especially on the s2 since it doesn't have the ignitor, their pretty much bullet proof and they can run on just about any dwell time reliably, including stock.