Engine stutter , failed spark plug

[Intuit]

Purchased new or used?

 

[Bg99]

I bought the car used

 

[Bg99]

My fault for not giving it long enough to adjust , checked exhaust and all intake no leaks. Went for a drive got it up to temp yesterday and long term fuel trims dropped. Back under 10% at all engine loads and idle. Another compression test on the warmed engine and 180 across all 4 cylinders. Thinking Injector seal was the culprit.

 

[TyphoonFiST]

My fault for not giving it long enough to adjust , checked exhaust and all intake no leaks. Went for a drive got it up to temp yesterday and long term fuel trims dropped. Back under 10% at all engine loads and idle. Another compression test on the warmed engine and 180 across all 4 cylinders. Thinking Injector seal was the culprit. View attachment 62291

So how did it all turn out?

 

[EdServin]

Today mine cracked ceramic in cyl 1. One step colder plugs running Stage 1 dizzy tune. Going back to stage 1 Cobb tune and original spark plugs.

 

[TyphoonFiST]

Today mine cracked ceramic in cyl 1. One step colder plugs running Stage 1 dizzy tune. Going back to stage 1 Cobb tune and original spark plugs.

Did it cause a Misfire? Or set a code?

 

[EdServin]

Did it cause a Misfire? Or set a code?

Misfire...