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I think the leads are originals on my 2002 NB with 80,000km I've had for a couple of weeks . They appear to have been wrapped together with electrician tape. Would it be good to replace them now? It looks like the coils are on the wires themselves - is it difficult to replace them myself? Does the replacement come with the coils? What's a good brand?
Finally, what is the current plug of choice? NGK BKR5E11 or BKR5ES11?

lol

Dann

if the tape looking stuff is loose, its just to protect the leads from chaffing....my NB had the same stuff on it

as for new leads...they dont come with new coils

yea that tape stuff is standard on all nb8b iv seen wouldn't worry about it.

why you want to change them though if it running nice leave it maybe?

spark plugs wouldn't hurt though ill reply with the ones i put in tomorrow but again if running nice maybe there fine

Well it can be a bit jerky when cold, but at 80,000km and probably the original leads - well I thought it might be good to change them anyway. With the plugs changed it's kind of another tick off the list to keeping it running smooth I thought....
Standard NGK plugs and a basic but good leads replacement should see another 80,000km is my thought...
Just need some advice on choices please...?

NGK plugs and Mazda leads. A bit old school but it should work. Join the MX-5 Club and get a 10% discount at Grand Prix Mazda on parts.

The conventional wisdom of replacing the plugs and leads (NA6 ,NA8 & NB8A) doesn't necessarily ring true on a NB8B which have Coil on Plug (COP) therefore there is only 2 short coil leads.
Mine are original at 130K Km and are fine.
Others still have the original leads and much higher Km's

Go ahead and replace the plugs!
Unless the 2 plug leads are actually causing a problem - leave them alone.

Your money - your choice

Good advice, much appreciated dB.
...and I get to learn what COP means - bonus!
You still there Mr.Cynical = Dann?

Also.....why do U.K sources always specify NGK BKR6E11 plugs when U.S. and Aus.
specify NGK BKR5E11?
Can't be that it's the cold winters ....they could be anywhere.

UK, different temperatures and different fuel.

Im not cynical, I just think its a little cute how much effort you are putting into 'fixing' the car.

My thoughts are: The best way to guage the health of an engines systems (fuel, internals, ignition) is to time it on a rolling pass (say 80-120 in 3rd) if its stock you will find out how healthy it is pretty fast.

Also you must appreciate that when new people join here, get a car and get comfy posting, many do what you are doing and get really really specific about many questions, a popular one is fuel in NBs, along with tyres and gearbox oil.

They are just repeat threads and its a bit cute. No offence intended, you seem like a nice guy whos passionate about the mx5 world which is great.



Dann

JBT DeB +1. At 80000 km the car is a pup and these cars are very robust . Refer the owners manual for servicing and just drive the car. The P2 is really a very good package and delivers a real sporting experience for those wanting an active drivers vehicle. Also for parts Mazda oe are likely to be the best products so a phone call establishes cost benchmarks. Nitro raised some pertinent points and useful comments.

Silvia wrote:Well it can be a bit jerky when cold,

have talked to multiple mx5 owners i believe this is very common, people say that "oh yea, i added fuel injector cleaner now its less jerky" but not sure if it true or placebo....... i add fuel injector cleaner every minor service which is like once a year with the kms i do

just enjoy the car and punch it every now and again to realise ur alive..............