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Hi all, Looking to upgrade to r35 coils from stock. I see that these can be run on GT-R and GTTs, but can they also be run on an NA RB25 Neo? I don't see why I wouldn't be able to since GT/GTT are so similar but wanted to double check. Cheers

Thanks, I kind of suspected it's on it's way out. I gave it a clean a while ago, but still seems to have the same issue

Hey all, I've been hearing some weird buzzing from my IACV lately. Whenever i turn the ignition to ON, it starts to buzz. When I pulled the IACV off to see what it's doing, I noticed the valve is moving back and forth just ever so slightly. Check the video below: I'm not sure if the valve is trying to open itself all the way and is getting stuck or if it should only open halfway like that. Any idea if the IACV is on it's way out? My car does idle higher than it should be, so wondering if faulty IACV may causing it.

Hmm okay, good think I checked. @GTSBoy I guess I'll test the circuit the old fashioned way with a multimeter. Ill trace from the ECU to the fuse and then from the fuse to the IACV. Do you know what fuse #14 would be on this diagram? I assume it is the 14th fuse counting from left to right, top to bottom on the kick panel fuse box.

Hey All, My car is idling a bit high when warmed up and seems to be stuck in "cold mode". (bad fuel economy) I noticed when my car is set to ON position, the IACV/AAC valve is getting less than 12v. Seems like there is maybe something wrong with the circuit. I'd like to see what happens to the AAC valve when it's getting all 12v when the car is running. I'm a bit of a noob at electrical, how would i go about doing that? Is it as easy as running a wire from the +ve end of the battery to the +ve end of the valve, and then running another wire from the -ve end of the valve, back to the -ve end of the battery, and then starting the car? I don't really wanna fry anything, so thought i would double check by asking here. Thanks!

Hey All, wanted to revive this thread again. Just checking to make sure my IACV is functioning properly. When I put the key to the on position, my IACV valve seems to buzz and not fully open all the way. Is this normal? It also sorta moves back and forth just slightly as if it's stuck or something.

@joshuaho96 sounds good. Where did you get that repair manual? I think that's different than the workshop manual?

Ahh, didnt think it may be a connection issue with the laptop, but that's probably right. I'll double check the connection next time. Is there any way to figure out if the coolant thermostat on the iacv is working correctly?

Yesterday I adjusted my base idle and set my TPS. Im still getting 5* ignition timing on warm up. A few things I did notice yesterday tho was, when I put my key to On, my IACV starts buzzing. I cleaned it again and also captured a video of what its doing when it gets power. Is this normal for these things to buzz? I also took some logs of my car while idling, I noticed occasionally in the software that all the guages would just end up going to 0 for a few milliseconds, and then return back to normal. Does this mean a short somewhere? Or is it likely that its just a software bug. First time I've ever seen this and I've used datascan quite a bit. IMG_3616.MOV

@Dose Pipe Sutututu I assume you mean by adjusting the idle screw?

@BK @TurboTapinWas having similar frustrations with Amayama. I tried to order a while ago, but they quoted me $1500 to ship to Canada, and there was a 3.5 month lead time -_- @GTSBoy @Dose Pipe Sutututu I fixed up the rubber boot, but still seeing the timing go way back to 5* on warm up. I hooked up my smoke machine again and I see it's still lightly leaking from that area. I may try some heat shielding tape to really seal off that area for now just to see if that makes any different.

cool, thanks guys. ill let you know if it fixes the issue!

ok, I bought a smoke machine thanks to recommendations from @Dose Pipe Sutututu and found a leak instantly. Looks like the gasket between the throttle body and intake is cracked and possibly letting air in/out. Since shipping times are slow as hell from Japan, what would be the best way to repair this temporarily?

@Dose Pipe Sutututu I dont have a smoke tester. Maybe I should go invest in one... I tried checking my exhaust mainfold for leaks, seems fine. Took a look at my IACV, pretty clean, so doesnt seem to be an issue. I also remove my exhaust and checked the cat, hasn't disintegrated and doesnt seem clogged. Anybody have any idea what to check next?

Spent some time spraying carby cleaner around the engine yesterday, but wasn't able to find any leaks. checked around intake valve body, intake manifold, injectors, vacuum lines, breather hoses. Ill be checking my exhaust manifold for leaks, iacv and carb tomorrow.