so it seems my sp20 is running on 3 cylinders :/
I replaced the sparkplugs and saw now change ion performance.
So i started pulling out the ignition leads/ coils whilst the engine was running and noticed increased RPM when pull each one out... except for the far left ( RHS of car ).
is this a suitable replacement ?? has any1 used these ?
http://www.ebay.com.au/itm/Ignition-...60796255936%26
OR should i replace all 4 ??
any recommendations for replacing the whole set ?
Keep in mind the car has done 230k kms and they're probably the original ones that came on it.