Cylinder misfire and blown spark plug with LAP3 tune

[eflyguy]

Trying to understand this -

Lower than labeled octane (i.e. bad gas) would cause early detonation, more force on the plug, leading to failure?

So it's not really about the electrical specs of the plugs, but the actual strength of the design and materials?

If that is the case, would a comparable-sized plug used in a higher compression engine solve the issue?

Again, just trying to understand what's going on (as I plan to modify my Stinger) ..

 

[Rufus]

Sorry to hear about your misfire!

Just to go over a few things with you, you were running the chip on the 91 setting with 91 octane gas?

We have seen a few others with stock motors/no bolt ons or chip have some issues with their plugs (only a few incidents so far).

Lap3/PROS did inform us that the stock plugs should be sufficient to run the chip (unlike the Optima which did not come equipped with plugs sufficient for the tune). I will be contacting Lap3 in Korea and HKS this week to look further into a possible alternative to stock plugs (if needed).

We want the community to know we take all products we carry seriously and always looking out for the best interest of the customer. As soon as I hear back from both Lap3 and HKS I'll be sure to let the community know if we will be requiring a different set of plugs/solution if there is an alternative!

Thanks


I'm pretty sure these will not fit the 3.3TT, just for the 2.0T

Are the plugs the same in the 2.0 and 3.3? Are the plugs for the 2.0 considered by Lap3 to be sufficient as well? I'd read about 2.0 plug issues before in Optimas, and seen folks iterate the plugs in the Optima weren't as robust as those on the Stinger. However, I'm unsure what Stinger motor was being referenced, and would really love clarification on this, if possible.

 

[Kamauxx]

I think people are saying the 3.3 plugs are sufficient.

The 2.0 in the Stinger is the same engine used in the Optima.

 

[ballistic]

@STINGER is having problems too. if i'm not mistaken he went through a couple of spark plugs and a coil. then removed the tune. not good.

 

[iclicku]

This car has been available in Korea for a while. I'm assuming they've had the lap3 tune longer there as well. I wonder if anyone of our Korean friends could check out naver.com and see if they find anything over the pond. I wonder if they are having issues as well.

 

[Kazz]

Plugs and other things may be different in different countries, however.

 

[Hung tran]

I contacted Lap3 today for the same concern about a misfire. They told me the HKS m45xl will not fit the 3.3tt. David from Lap3 told me that the HKS m45IL will fit. Still waiting to hear back from him.

 

[iclicku]

Thanks for the leg work hung!

 

[Hung tran]

Your very welcome. As I work for Kia dealership. So I have one tricked out for the owner. The misfire was on a customer car. We took the chip off and it still run bad under boost.

 

[iclicku]

Your very welcome. As I work for Kia dealership. So I have one tricked out for the owner. The misfire was on a customer car. We took the chip off and it still run bad under boost.

It's good to know you guys are working with the customer on this. Wish I had a service dept. like yours.

 

[Rufus]

I think people are saying the 3.3 plugs are sufficient.

The 2.0 in the Stinger is the same engine used in the Optima.

Then does this mean that those running this chip in a 2.0 model should definitely upgrade their plugs? Or does it mean they're sufficient for this application?

 

[iclicku]

I think the implication is that those with 2.0 engines need to upgrade their spark plugs.

 

[Daniel @ K8 Stinger Store]

I was going by information listed on your website.

I'll make the change to state otherwise that the Stinger does not need upgraded plugs

 

[Daniel @ K8 Stinger Store]

I think the implication is that those with 2.0 engines need to upgrade their spark plugs.

Yes, the 2.0T would run different plugs than the 3.3TT

Then does this mean that those running this chip in a 2.0 model should definitely upgrade their plugs? Or does it mean they're sufficient for this application?

The 2.0T is unlike the 3.3TT. I'm checking on this as well, I was told both plug options are sufficient

Then does this mean that those running this chip in a 2.0 model should definitely upgrade their plugs? Or does it mean they're sufficient for this application?

Checking on this to be sure! Initally I was told with the Stinger no plug changes needed to be done

I contacted Lap3 today for the same concern about a misfire. They told me the HKS m45xl will not fit the 3.3tt. David from Lap3 told me that the HKS m45IL will fit. Still waiting to hear back from him.

That's what we are gathering as well, double checking and confirming that these will fit and be a solution.

Are the plugs the same in the 2.0 and 3.3? Are the plugs for the 2.0 considered by Lap3 to be sufficient as well? I'd read about 2.0 plug issues before in Optimas, and seen folks iterate the plugs in the Optima weren't as robust as those on the Stinger. However, I'm unsure what Stinger motor was being referenced, and would really love clarification on this, if possible.

Plugs are different on both. Only the 3.3T plugs are the ones we were told were "good " enough with the Lap3 chip.

 

[Rufus]

Yes, the 2.0T would run different plugs than the 3.3TT

The 2.0T is unlike the 3.3TT. I'm checking on this as well, I was told both plug options are sufficient

Checking on this to be sure! Initally I was told with the Stinger no plug changes needed to be done

That's what we are gathering as well, double checking and confirming that these will fit and be a solution.

Plugs are different on both. Only the 3.3T plugs are the ones we were told were "good " enough with the Lap3 chip.

Thanks for the clarfication, sir! Do you recommend and/or carry a specific plug upgrade for the 2.0?

 

[Aquadog]

Might I ask before you blew the plug , how much more performance did you get out of the chip . And was it worth it .

 

[Chris]

Might I ask before you blew the plug , how much more performance did you get out of the chip . And was it worth it .

Is any amount of performance gain worth blowing the plug? Who knows what other damage it did..

 

[Aquadog]

That's what I'm talking about .

 

[Dark_Knight GT]

Might I ask before you blew the plug , how much more performance did you get out of the chip . And was it worth it .

Objectively, the additional power was considerable and I ran it knowing there was a chance for problems. If the benefits had been negligible, I’d have taken it off the car. I didn’t because of the performance benefits. That said, I won’t take the chance again until Im confident that the recommend countermeasures are sufficient to prevent these outcomes.

 

[GuyManDude]

Might I ask before you blew the plug , how much more performance did you get out of the chip . And was it worth it .

I have been running the Lap3 chip since Saturday on my 2.0. Although I intend on A plug upgrade I haven’t swapped them yet. The increase in power is like night and day. So far I have had no issues and have run the car pretty hard.