Maybe pull another plug (or two) and see if they're similarly pristine ... that clean and 1000 miles in would baffle me a bit in my car (albeit an older and simpler engine) .... if they're different put them all back ... start the car ... and with gloves on pull each plug lead off in turn .... you should notice a definite roughness each time (you'll know in a second or two so you can push the plug cap back on and all should settle down ... that plug is suspiciously clean to someone of my vintage. ... if you pull a plug lead and there's no change that will narrow your search to that cylinder..... may as well eliminate a missing cylinder for sure ... only takes a few minutes and it's free!
K
PS ... you might want to hold on that if your car has individual coils on the plug, pending someone confirming that wouldn't harm them (used to pull the coil packs to test this way all the time on my race engines but better safe than sorry.)
Last edited by Image; 13/07/25 06:02 PM.
