robinellis222

rx8 has a missfire on cylender 1 and have taken coils off today and they all have a mark on bottom like a burn is this what is causing the missfire and help whould be great

wcs

iTrader: (2)

No that mark means nothing.
You need a HEI Ignition Coil tester.

It's the only thing that will tell you if your coil is bad

dannobre

iTrader: (3)

NO...good coils can have them.....and bad ones might not...

There is NO correlation between that mark and the coils working

You need to check them with a HEI coil tester...looks like a spark plug with a clamp on the side of it

wcs

iTrader: (2)

^^^^ It's a tie!!!!!
lol

DarthRX8

that was pretty funny!^^^ we need to have the seconds added to the time...

dannobre

iTrader: (3)

LOL.....lost by seconds.

Good thing it's not a competition

There are lots of things that can cause a missfire...from a faulty coil..to plugs, wires, poor ECU connections....ESS sensor with crap on it

If the coils have more than 50K miles on them...I would just change them out if you can afford it..they are reasonably cheap and easy to change....and likely do the wires and plugs as well.

robinellis222

We're is my ess sensor sorry its my 1st rx8

dannobre

iTrader: (3)

beside your lower pulley...on the drivers side of center...just wipe the flat surface off with a rag