motohegg

Just installed the BHR ignition kit at 32,400 miles. 2011 Sport, manual. DD mostly highway and autocross approximately every other weekend. Probably a little early and the car "seemed" to be running well, but decided it couldn't hurt anything to upgrade.

Here are how the coils and plugs looked. The spark plugs don't look great IMO.

In the picture of the coils, from left to right - L1, T1, L2, T2. T1 had a white spot and, you can't really see it, but T2 was beginning to get it too.

Let me know if anything looks weird or if you have questions.

RIWWP

iTrader: (2)

TSB: 2004-2011: E001/07: Ignition Coil Inspection- UPDATE
http://www.rx8help.com/doc/tsbs/Igni...-%20UPDATE.pdf

I recommend more frequent plug replacement. Those are rather fouled. 15k - 20k would probably be better.

motohegg

I'll check them in another 15K. Thanks for responding!

Steve Dallas

One of my coils on my 2011 failed at less than 20K miles. That was my impetus to install the BHR kit, which has been working great for me for over a year now. Plugs are on my maintenance schedule for yearly replacement. I get them from Auto Parts Warehouse, who periodically sends out coupon codes for 20% off and free shipping, which brings the price down to under $60.

motohegg

Nice. Thanks for the tip.

I guess the deposits on the spark plugs were from oil. Still researching. I'll also see if my bluetooth obd2 reader can display AFRs to see if it's running a little rich.

RIWWP

iTrader: (2)

If you grab an OBD2 app, there are 2 reported AFR PIDs from the ECU. One is the commanded AFR (what it is expecting), the other is the actual AFR (what it sees).

Keep in mind that rich vs lean... your plugs are still going to foul up relatively fast inside a rotary engine. It's a filthy filthy environment. You can't magically save plugs with adjusting tune (although there are plenty of other benefits).

Nadrealista

plugs on new to me 2010 S2 looked pretty much the same(maybe slightly worse) at 28K miles. Lady was previous owner so doubt that car saw any hard use..that will change soon :-)

wonder if there is more life in them if there were cleaned properly?

ASH8

Good advice from RIWWP..

I am about to change the Spark Plugs in my S2, I have been running Denso Racing and yes they run a little cooler than OEM NGK's, but the Denso's have performed faultlessly.

Going to do my Coils too for the first time, not that car needs them as she fires up as good as and as fast as new, but I purchased 2 sets of OEM Coils when they were cheap @ $33.10 USD each new.
So my original coils have done 45,000 KMs or 27,000 miles, change them out just for THAT ''''piece of mind''''.

Nadrealista

but I do wonder if regularly using something like FP60 will help keep plugs cleaner and carbon down?

RIWWP

iTrader: (2)

Possibly. But be very careful about jumping to conclusions. For example, if you pick an additive that is also capable of removing oil, then you would also be stripping the oil film from the seals and surfaces inside the engine, leading to significantly decreased engine life.


When I get an 8 again, I'm going to be testing with a water injection kit, seeing how clean it keeps everything. I proved a few years ago that it can remove the carbon, and a theory is that it won't be able to remove the oil film. Unknown if that is true however.

paimon.soror

iTrader: (15)

Been running FP+ since I bought the car. Spark plugs have been nice and clean. I actually took a carboned up spark plug and left it in a cup filled with FP+ for 5 hours. Came back, used a rag to wipe dry, and it took off a significant amount of carbon. My UOA's have been stellar (except that time i ran Royal Purple, but thats a different story).

Will it save an engine? who knows. Does it clean better than seafoam? not sure, i dont run seafoam in my car. Does it remove oil film, it hasn't been reported to, and 40k+ miles and counting on my car w/o issues.

Nadrealista

good to hear that, do you also premix?

paimon.soror

iTrader: (15)

1oz fp+, 4-6oz Amsoil. OMP rates have been increased 10% as well.