oem ignition coils discontinued ??

[Arfan Butt]

hi is it true that Honda isn't making ignition coils for the nsx ?mines a 99
if so where can Buy compatible ones and where would be the cheapest place to buy 6 ignition coils please...

I'm not mechanicly minded as you can probably tell so excuse if the questions are a bit ignorant.

I've just been googling and one nsx parts seller said they are rare as hens teeth.

[goldnsx]

Who did you ask? In the US they can be found here for example: https://www.oemacuraparts.com/v-1999-acura-nsx-coupe--nsx-alex-zanardi-ed--6-speed-manual/engine--high-tension-cord
They are pricey though...

[britlude]

rumour was they were selling them as a party-pack of 6 for the later 3 terminal style units (post 1996 obd2 cars) , for silly cheap, obviously i can't find the thread on nsxprime, just to be awkward....

if you don't mind drifting from oem for such things, rockauto has a selection....
https://www.rockauto.com/en/catalog/acura,1999,nsx,3.0l+v6,1419791,ignition,ignition+c oil,7060

[exiges1]

Another option - try Adnan at A.S. Motorsport. He makes his own upgrade kit. http://as-motorsport.com/site/en/catalog-c-6/nsx-c-1/engine-c-18/?category_id=18&page=3&sort=price

[britlude]

found the part number on an archived thread.....

http://www.nsxcb.co.uk/archive/index.php/t-11400.html


.....you can buy set of 6 x 3pin IG coil + 6 x spark plug at unbelievable price in US
using the part no. 06300-PR7-305....... tho i'm not sure the plugs are included in the ones i see currently....

https://www.ebay.com/itm/GENUINE-OEM-ACURA-NSX-1995-2005-IGNITION-COIL-KIT-06300-PR7-305-/302620422779

.....just got to find some one that will ship to uk!

edit..... https://www.ebay.co.uk/itm/ACURA-HONDA-OEM-IGNITION-KIT-06300-PR7-305/132072103329?hash=item1ec01c5da1:g:z7EAAOSw5cNYXKs i

[britlude]

Another option - try Adnan at A.S. Motorsport. He makes his own upgrade kit. http://as-motorsport.com/site/en/catalog-c-6/nsx-c-1/engine-c-18/?category_id=18&page=3&sort=price


evolved from this thread on nsxprime....
http://www.nsxprime.com/forum/showthread.php/196051-Bosch-cop-coils

which in turn evolved into 'operator' offering the kit...
http://www.nsxprime.com/forum/showthread.php/197826-COP-COIL-set

i'm guessing adnan made a tweak or 2 as operators kit didn't work with oem ecu.... only aftermarket ecu's where the coil timing could be tweaked in the software.....

[Arfan Butt]

thanks guys appreciate all the advice ..are there any other parts guys recommended .
should I replace all the coils as they have never been changed.

Also 2 of my coils are extremely rusty would the car drive with out causing damage to the engine if all of them were not functioning 100%.

[goldnsx]

I'd start with the 3 rear ones as they're prone to fail. The front ones don't get water under normal conditions.

Do you think you can DIY or do you let a mechanic do it for you? If DIY you can pull the connector from the coil. If the engine runs rougher you have a good coil. If no chance = bad coil.

[Arfan Butt]

thanks will try each one ..im sure could manage some basic diy I can follow instructions quite easily ...trained by the misses.

[britlude]

for the £150ish price of the set from the second ebay listing, i'd just change all 6 and be done with it, keeping the rust free old ones on the shelf

... and be glad i haven't got the 2 terminal early ones that are pretty much that price each OEM!!!

[goldnsx]

You might first have a look before you order them if they have 2 or 3 pins. OBD2 was a little bit later in Europe...

[Arfan Butt]

how do I know if mine are 2 pin or 3 pin ?

[goldnsx]

Disconnect one of them or you might be able to see if it has two or three wires to each coil.

[Kaz-kzukNA1]

Based on all of your old posts plus the recent one in another thread, for the future reference, could you let us know the followings?

Is this your NSX, family's or someone else's ?

What is the first 6 digits after 'JHMNA1' of the VIN?
Please DO NOT post the full VIN on public website.
Only need the 'aaaabb' portion of the VIN format as follows and no need to tell the rest such as 'xxx'.
JHMNA1aaaabbxxx.



Thank you.

Kaz

[Arfan Butt]

Hi Kaz

My Nsx midnite purple t top auto
JHMNA1270XT000XXX

regards
Arfan Butt

[Kaz-kzukNA1]

Hi, Arfan.
Thank you for sharing the info.

Your NSX is 99 spec, NSX-T, AT and it doesn't have the MDU (Misfire Detection Unit) so your IG coil is 2pin style.


You seemed to have solved the other issue of not being able to start the engine and probably too late on this occasion but for the future reference regarding the 2pin style IG coil, here is the options;

1. OEM IG coil
OEM 2pin style IG coils is still available but bit pricey even if ordered from Japan.

The electrical spec is the same between the Front and Rear bank IG coils so they are interchangeable but the vent hole position has 180deg offset between the two banks.


2. OEM IG coil but in aftermarket box
You can get Intermotor UF91 through Rockauto at very reasonable price.

I didn't test it on the IG spark dyno or cut it through to check the slice model but checking the material used, I'm 99.9% sure it's the same OEM one in a different box.
Very likely to be 'B-ranked' parts due to cosmetic reason.

There are many owners using it in US and I've also installed it for several owners;
http://www.nsxcb.co.uk/entry.php?2064-Drive-shaft-CL-Hyd-sys-etc-05

http://www.nsxcb.co.uk/entry.php?2065-Drive-shaft-CL-Hyd-sys-etc-06

http://www.nsxcb.co.uk/entry.php?2289-Busy-days-02

If you are keeping it NA and as the compression ratio is not high on our NSX and from the point of CPU power/INT job timing, you won't see benefit by changing the dowel time, spark energy, etc.
If you look at the shape of the piston head, you will have better chance of getting extra gain by improving the spray pattern of the INJ.


3. Convert OEM 3pin style IG coil
I haven't looked into this in detail because JDM never had 3pin style IG coil throughout its production years but since it's being used on the NA1 LEV model NSX outside of Japan,
the spark energy, waveform, dowel, etc characteristics seemed to be the same as the 2pin style one.
3pin style has larger head and extra feature such as voltage measurement, ionised current sensing or other patent related methods for the misfire detection so worth reviewing this conversion for the future.



https://lh3.googleusercontent.com/ASAcV4jlDXVYLKPaYEK48raX-Lz2SfeNM9phDEzvNlYFUBWhvWJqFO10lFHglLdC0W96d9RKcBO EVBiJc4E_uM8fywmiDFo6G-oCeVwtRRjAu1_p4W4gQPWayElLxYMvrYQQyVxJfZgypvk7HJ3d xYEuXVsU0XdwVs3OMofjoWPi7AhIaI0687hJq54ESx4J4L2LKt ZGPmnVNPyQBz4jAuaxwt5lllFg_k6nNB6bVJOn9U4zAFXNhLLd J6TNIL1f4Z5zaqsBUiArQPZjJ37DskaDvDsP1JVmVzM1psGnFK UjYJcivmilqgFMuT0f4obdGA_XXUSVQaGNaQ7PNFQXxXLGwHH0 NBOgpNcFByiVzwVNbyNwpPunpMy_UDo0IhgqtKxYS0rwOwYLWh zWCEJEXheZkiDA-zug3Ou_cccVcHIUB48KGzETqiZnAqT6D1G2pkTVZqIxbuoTS_Z iKq2y3TRoCcOUTXl2RVNFrXk9myYYU_A42p1mwL_EP_efRPuzZ jCD2n-rhMsYS7okek7u9e6YNLlSq1tLIK79l5nDv9Wi7hfS7lr5F_Ddv aQBgH_H9aku6lMgm7pvoy2LV_ECJEeb6UNMT5RfqMJ1ZH2N=w1 080-h608-no
You will get all these 6 x 3pin style IG coil for just over US$100.

You will need the later spec IG coil cover (it's already on your 99 spec).

Haven't looked into the terminal spec yet.


Kaz

[Arfan Butt]

Thanks for the info Kaz...
I sanded down the rusty plates on the ignition coil as I thought that was the issue on the car but it came down to a blown Acg fuse.

I honestly don't know what should be done on the car I have a brief list
all the belts (aux, alternator and timing belts)

, water pump, crankshaft pulley and coolant

Brake fluid

Air filter

Transmission fluid

Fuel filter

Valve clearances

suspension possibly

respray and gaskets etc


but am hoping you can fit me in at some point for your health check service so I can begin hopefully via you if you have the time.