What are my spark plugs telling me?

[Devin]

Couple questions???

1. what brand are the plugs?(can't see in the picks but at least don't look like HKS - ask because I looked on RockAuto and didn't find right fit plugs for Stinger)
2. what is the current gap?
3. depending upon question #1, what is the heat range of said plugs(this can be confusing when trying to compare brands)?
4. what torque/tighten method are you using?

Random issue, confirm gap. issue happening regularly once engine is fully warmed up, see question #3. I am not second guessing any of the other responses but I inadvertently used an incorrect heat range on a different brand of plug and was seeing similar issues. HKS/Denso with 0.022 - 0.024 gap. way to go.....

I sure hope that person got their problem solved a year and a half ago

 

[turboAWD]

I was getting some stuttering at higher throttle input and thought my plugs were fouled (had them almost 20,000 miles). I was using Denso 5346 IKH24 Iridium Power spark plugs which are 1 step colder than stock. I checked the gap and a few had widened to more than 0.024 (gapped to 0.022 initially). I swapped plugs back to the stock plugs and gapped them to around 0.023 and ran the car for a few hundred miles. That's when the check engine light would come on, multiple misfires. I re-gapped the Denso plugs and put those back in and removed my JB4 in case that was faulty. Tested again today and it ran great for 20 minutes and then boom, check engine -- multiple misfires on cyl 1,3,5. Not sure if it is a coil pack or something more serious. Any help would be much appreciated!

Misfires on the whole bank? Doesn't sound like a coilpack or plug, but I'm not an expert.

 

[nodenwire]

Misfires on the whole bank? Doesn't sound like a coilpack or plug, but I'm not an expert.

Yep! It's intermittent though. Could it be a fuel injector going bad?

 

[monusa]

time to let a pro take a look...