2nd Cylinder 1 Misfire in 2 weeks
 

Hey guys, hope you've been well. Car just made 100K miles. My plugs finally shit the bed a month or two ago, so I replaced all of them and all of my ignition coils with OEM parts.

Last week I got cylinder 3 misfire. Like...completely dead. Had to tow the car. Swapped the coil into cylinder 1 to see if it was the plug or the coil - lo and behold, cylinder 1 started misfiring. So I figured, shitty coil, replaced it. Problem resolved, no biggy.

Now today, after a couple of boosts (Sprintex 210) I'm getting a cylinder 1 misfire. It only seems to happen at idle and low load. I have a replacement coil and plug - but I would really like to solve the root of the issue. Everything looks fine on my OSDB reader. Also I'll mention that my car hasn't pulled any timing, so I don't believe the issue to be knock-related.

Anybody have any ideas? Thanks in advance.

Spark plug keeps gapping itself. Any ideas?https://uploads.tapatalk-cdn.com/202...9f85985f12.jpghttps://uploads.tapatalk-cdn.com/202...047521d09d.jpg

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What brand of plugs do you have. I don't recall seeing the electrode that recessed in standard oem plugs.

lol spark plug modz

2 threads in 2 days for the exact same thing with the exact same post?

and have you ever looked at logs while driving it hard or you have no clue if it s detonating ?

Just DENSO oem plugs that keep failing. 2 posts on 2 threads because I didn't get a response in over a day on this one.

Yes, I have logged my pulls, am not knocking or pulling timing.

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It didn't start this way. It ended this way.

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If it didn't start that way, then you have some detonation or something wrong going on inside that cylinder.

Is the knock sensor muted in your tune?

how much PI% do you have at high rpm high load?
how far is the end of injection to the spark ignition? there is a value for that in ecutek measured in milliseconds

do you have access to an external wideband afr sensor ?

tires look wideband af :popcorn:

kek

I'm chalking it up to chinese plugs. No knock, nothing about the tune or timing or fueling or scaling has changed since I swapped the plugs. Seems to run fine now.