3.3TT Cylinder #6 Misfire

[Shrikecorp]

Does anyone have the firing order handy so I can locate which cylinder is misfiring?

See above posted 3.3TT - Cylinder #6 Misfire by Hydrajin in this very thread.

...edit: tossed together a pic. Not more informative than Hydrajin's post, just with more color

 

[Hydrajin]

See above posted 3.3TT - Cylinder #6 Misfire by Hydrajin in this very thread.

...edit: tossed together a pic. Not more informative than Hydrajin's post, just with more color
View attachment 24351

Very nice, I like *Borat voice* .

 

[Angel]

If you bought the ikh24 Denso plugs good chances you may have blown them, they're only 1 step colder which is borderline enough for stock car, my plugs cracked without a tune or chip, stock boost levels cracked them.

I have the Denso IKH24 and fried 2 plugs on cylinder 2 and 6. Was having misfires and the code said misfire on Cylinder 2 and 6. I changed the the 2 plugs with the oem ones in the meantime and the issue is gone. I ordered Denso IHK27 which are 2 step colder.

Have you had any idle issues with IKH27 plus which are 2 step colder? Any issues at all? I read that in cold weather colder plugs could cause issues.

I have JB4, WMI, DP and intake. I blew the 2 plugs doing some WMI pulls.

 

[Hydrajin]

I have the Denso IKH24 and fried 2 plugs on cylinder 2 and 6. Was having misfires and the code said misfire on Cylinder 2 and 6. I changed the the 2 plugs with the oem ones in the meantime and the issue is gone. I ordered Denso IHK27 which are 2 step colder.

Have you had any idle issues with IKH27 plus which are 2 step colder? Any issues at all? I read that in cold weather colder plugs could cause issues.

I have JB4, WMI, DP and intake. I blew the 2 plugs doing some WMI pulls.

I haven't had any issues at all with them yet, I don't think cold weather would affect them in any way; I gapped the at .022 to .023 I don't think any temperature would impacy plugs gapped that low.

Time will tell if cold plays a role, we get as low as -38°C for a few weeks consistently where I live. I can report that there are no issues at all for temperatures as low as 2°C. I would have gone with colder plugs if I could cross reference a colder plug.

My stock plugs on my stock boost car cracked without racing scenarios lol. It came to my attention under normal driving on a rainy day in the form of backfire then a few days later I hit the gas a little harder than usual and it went into limp mode and shutoff one cylinder untill next start-up. Kia botched this one along with the pad material choice. Curious to see what else they cut costs on down the road.

 

[Angel]

I haven't had any issues at all with them yet, I don't think cold weather would affect them in any way; I gapped the at .022 to .023 I don't think any temperature would impacy plugs gapped that low.

Time will tell if cold plays a role, we get as low as -38°C for a few weeks consistently where I live. I can report that there are no issues at all for temperatures as low as 2°C. I would have gone with colder plugs if I could cross reference a colder plug.

My stock plugs on my stock boost car cracked without racing scenarios lol. It came to my attention under normal driving on a rainy day in the form of backfire then a few days later I hit the gas a little harder than usual and it went into limp mode and shutoff one cylinder untill next start-up. Kia botched this one along with the pad material choice. Curious to see what else they cut costs on down the road.

So you go have the IKH27? No idle issues on drivability issues when driving normal not under boost?

I was thinking of gaping mine to around .024-.025? Any issues going that gap with the 2 step colder plugs from your experience?

 

[Hydrajin]

So you go have the IKH27? No idle issues on drivability issues when driving normal not under boost?

I was thinking of gaping mine to around .024-.025? Any issues going that gap with the 2 step colder plugs from your experience?

Yeh I have the ikh27, no issues at all.
I would actually say it runs better than it did before, it feels more responsive and sounds smoother than before. Responsiveness and smoother operation may have been a result of smaller gap and more intense spark with the narrower tip on the denso?

 

[Tonkabob]

I used a magnetic socket that has the swiveling built in extension, then swivels and extensions from there. I actually had no issue with that plug under the manifold arm. The most difficult part was removing the coil pack, but that was easier when I separated boot from the pack. Just need to be sure everything is pushed down together when you put it back in.

I've done it manifold off and manifold on. Leaving the manifold on was much easier but I do have a magnetic swivel socket and one more swivel to get at #3.
@Angel just blew 2 Densos (one step colder) this week trying WMI with his JB4.

 

[Revvdmedia]

I've done it manifold off and manifold on. Leaving the manifold on was much easier but I do have a magnetic swivel socket and one more swivel to get at #3.
@Angel just blew 2 Densos (one step colder) this week trying WMI with his JB4.

I understand the premise of why colder plugs are used (and how they work) and smaller gaps, but I'm not wondering if blowing plugs is common on tuned boosted engines, or if ours happens to be more susceptible than others.

 

[Hydrajin]

I understand the premise of why colder plugs are used (and how they work) and smaller gaps, but I'm not wondering if blowing plugs is common on tuned boosted engines, or if ours happens to be more susceptible than others.

Nope, issue is with crappy OEM plug choice, and 1 step colder don't really help much if heat is the culprit. I've doubled boost on a nissan engine using a manual boost controller with no tune for 100K with no issues at all.

 

[Angel]

Quick update.

I went ahead and changed the spark plugs with Denso IKH27 2 step colder today. Car is fine, NO CEL and no issues at all. Will test drive this week to confirm there are no issues.

 

[Piker]

Does anyone have the firing order handy so I can locate which cylinder is misfiring?

 

[ScottyDangles]

If you bought the ikh24 Denso plugs good chances you may have blown them, they're only 1 step colder which is borderline enough for stock car, my plugs cracked without a tune or chip, stock boost levels cracked them.

Well I have to say, it appears you are were 100% correct with this statement! I started getting misfires again, this time on cylinder 5. So today I changed them all to the IKH27s. I gapped them at .022 using the BMS tool, what a handy device! I also took the manifold off, that was a bit of a pain today since it was so hot, but job done, car runs as it should.

Thanks again for the help!

 

[Hacksaw907]

Well I have to say, it appears you are were 100% correct with this statement! I started getting misfires again, this time on cylinder 5. So today I changed them all to the IKH27s. I gapped them at .022 using the BMS tool, what a handy device! I also took the manifold off, that was a bit of a pain today since it was so hot, but job done, car runs as it should.

Thanks again for the help!

So all in all... Does that mean the ikh24 shouldn't be considered at all for the stinger? I was just about to install them in tomorrow, but if it's going to cause trouble, I'm going to hold off. Moreover, @Terry@BMS should probably remove them from his store too if they are actually that prone to failure with even stock boost levels.

 

[Revvdmedia]

So all in all... Does that mean the ikh24 shouldn't be considered at all for the stinger? I was just about to install them in tomorrow, but if it's going to cause trouble, I'm going to hold off. Moreover, @Terry@BMS should probably remove them from his store too if they are actually that prone to failure with even stock boost levels.

It seems the most problems come from stock factory plugs, and now a "few" people are noting problems with the IKH24's. It seems the 24's run well for most with a few exceptions. It looks like you can either take a risk with factory plugs (re-gapped), or a much smaller risk with 24's, or the most capable plugs being the 27's, but those will foul even quicker than 24's and would have a higher likelihood of cold start harsher idle (yet to be determined, some have stated no).

 

[Hydrajin]

It seems the most problems come from stock factory plugs, and now a "few" people are noting problems with the IKH24's. It seems the 24's run well for most with a few exceptions. It looks like you can either take a risk with factory plugs (re-gapped), or a much smaller risk with 24's, or the most capable plugs being the 27's, but those will foul even quicker than 24's and would have a higher likelihood of cold start harsher idle (yet to be determined, some have stated no).

I haven't noticed any cold start issues living in one of the coldest capitals in the world lol. Yet to stress these in true winter temperatures but -5°C start was as normal as +40°c that we have been having lately. Winter where I am will really show if extreme cold start has any issues when we get -40°C and lower.
As for fouling, I have driven a good 5K km on the 27's I'll pull one out and inspect for white residue but I suspect if the stock and 24s are blowing due to heat, the 27 is unlikely to foul with heat high enough for it to self clean or compromise a hotter plug. No clue why Terry has the 24s rather than the 27s on the site but I know the very popular hks upgrade is 2 steps colder than stock just like the denso 27s.

Will report back when I get a chance to inspect a plug or 2; 5k km should be way more than enough for signs of fouling plugs if they are indeed too cold for the motor.

 

[Hacksaw907]

After seeing the back and forth... I've bought a set of the ikh27's. But I'll go ahead with the ikh24 installation and see how they go. Figured I'll at least give them a shot first, and worst case scenario, I'll have the ikh27's on hand already to replace them if they crack.

 

[Adamdan]

Im stilling running stock plugs gapped to .024. I run mostly map 2 but have run map 3 and 5. I have lots of hard pulls with no issues so far. I have 6000km on them so far. I wonder how long they will last. I will probably order the ikh27 soon to have them on hand.

 

[StungBlueGT2]

I haven't noticed any cold start issues living in one of the coldest capitals in the world lol. Yet to stress these in true winter temperatures but -5°C start was as normal as +40°c that we have been having lately. Winter where I am will really show if extreme cold start has any issues when we get -40°C and lower.
As for fouling, I have driven a good 5K km on the 27's I'll pull one out and inspect for white residue but I suspect if the stock and 24s are blowing due to heat, the 27 is unlikely to foul with heat high enough for it to self clean or compromise a hotter plug. No clue why Terry has the 24s rather than the 27s on the site but I know the very popular hks upgrade is 2 steps colder than stock just like the denso 27s.

Will report back when I get a chance to inspect a plug or 2; 5k km should be way more than enough for signs of fouling plugs if they are indeed too cold for the motor.

Correct me if I’m wrong, but don’t colder plugs foul or get carbon buildup quickly if not driven hard or at high boost often? I was warned not to get 2 steps colder if most daily driving is not more than 8-10psi.

NGK says the general rule of thumb is one step colder for every 75-100hp added which is what most chips/tunes add to the Stinger. What is a Spark Plugs Heat Range?
I believe that’s why Terry and most tuners recommend only 1step colder unless adding WMI or running map5+.

 

[ScottyDangles]

All I can say is I blew 3 IKH24s over a 5 month period. My friend also just blew one of his IKH24s as well. He is going in Monday to have all of his plugs changed to the IKH27s. We were both using Map 2 on 93 Octane fuel on a daily basis.

All I can say is my car is back, lots of power, strong idle. I'll keep monitoring and report back if any issues.

 

[ecko04]

I run Map 5 almost exclusively after reviewing logs and having access to E85. I run the HKS plugs, I know — an unpopular opinion given their price, but I’ve had no spark plug issues.