Since my car is still running rich by the smell from the left exhaust I would like to replace the stock Platinum plugs with the Iridium ones. I don't mine about the radio inteference. Would that solve the problem?
The exhaust smell can be a number of reasons. I would not complicate the problem until it is resolved.
See the service manual if you need a reference on where to start. The cats may be old / damaged. You may be having inadequate combustion. Make sure fuel pressure is where it needs to be, check / clean fuel injectors, check spark plugs, etc.
Since my car is still running rich by the smell from the left exhaust I would like to replace the stock Platinum plugs with the Iridium ones. I don't mine about the radio inteference. Would that solve the problem?
I doubt Iridiums spark plugs will solve the problem. Unless you have not changed the spark plugs in the past 5 years.
Yes, you can use Iridium spark plugs in NSX. Denso Iridiums will cause radio interference, NGK does not.
I use NGK Iridium in my NSX and Supra turbo, they are very good, as good as Platinums if not better, not to mention also cheaper. NGK Iridiums cost $6.50 each.
Cheaper = single iridium electrode with a steel ground, vs. OEM platinum on both electrode and ground. The "better" iridium plug is the same price as OEM because it has an iridium tip and a plat ground.
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