91-94 coil packs.

[cccscotland]

Hi all,

I have a misfire when warm and under load that sorts itself out over 4k or so RPM but no warning light as no detection unit. It's not the fuel pump resistor - I pulled that and nothing changed. I don't think it's fuel or fuel filter as the car runs fine when cold. I've taken a look at the coil packs. The rears are rusty on the metal band that runs round the top - I don't know if that's an issue? Anyway the fronts are all marked up FR and have no rusting, but the rears have no marks on them. It's a UK 95 car with 2-pin coil packs and no misfire detection, which I think makes it the same as US 91-94.

I've had the car over 12 years and never changed them, and the car now has over 210k miles on, so it may well be that they are the problem, but I'm not keen to pay the $1200+ that my dealer has quoted to find out.

I see in the U.S., various eBay vendors lump the NSX coil in with the 91-96 Legend (TL in the states?), part number TC-16A. The ones on my car are marked TC-15A. I also understand from the forums that the front and rear banks are different, but the markings on the front and rears that I've pulled from my car are identical, other than the big white FR painted on the top of the fronts. The rears have no white paint.

So, cutting the long story short, in order to rule out the coil packs do I need to shell out the $$$$ that Honda UK want, or can I troubleshoot with a TC-16A? Also, the aftermarket coils don't specify front or rear. Is that a sign that they won't work well?

Thanks in advance,
Matt
1995 NSX-T

 

[Larry Bastanza]

Pls review this thread:

http://www.nsxprime.com/forum/showthread.php/187032-CEL-pattern?highlight=coil+paks

Post #19 ....

Any NSX friends you can swap coils with?? Unfortunately the 2 pin coil are pricey.



Regards,
LarryB

 

[cccscotland]

I'm in Switzerland, been living here for 3 years but mods (6 speed box) mean that the Swiss wouldn't let me register it, so it has been sitting for 3 years. We are shortly moving back to the UK, so I need to drive it back. I snuck it over to France for a test drive and the miss became apparent. Unfortunately NSX's are very thin on the ground here.

I took all the coils out, and one (middle rear) was really rusty, the others much better. No sign of tracking on the tubes. I was wondering if the places selling aftermarket 91-94 coils without specifying a bank could supply a single coil that I could use to troubleshoot all cylinders.

I suspect my best bet may be to stump up for a single rear coil and see if that improves matters before trying other things.

Unless the fact that it only misses when warm, under load and at low revs is a smoking gun for anything else obvious?
M