3.3TT Stinger Misfire

[Stingerr]

Hello everyone I need help I have a misfire that I cannot fix since I installed lap 3 pro tunner I already changed the 6 coils pack I have also changed the set the spark plug three times I have used Hks , densos 27 and 24 I still have the misfire
Mods
Secondary down pipe
Air intake
Cat back exhaust
LAP3 pro tuner v 2.5

 

[Justin B]

Worth noting, 1/3/5 are all one bank of the V6.

Have you tried removing the Lap3 to see if the issue pertains?

Edit: Annoying to remove based on the install instructions I just read, but, may be worth it to find the cause.

 

[Stock_stinger]

What octane and map are you running?

 

[Stingerr]

Worth noting, 1/3/5 are all one bank of the V6.

Have you tried removing the Lap3 to see if the issue pertains?

Edit: Annoying to remove based on the install instructions I just read, but, may be worth it to find the cause.

I have not done it yet

 

[Stingerr]

What octane and map are you running?

I’m using 91 with Boostane also I did try it with racing gas still have the misfire
User mode , stock map
Mode 2,3 I always have the misfire

 

[ddft1949]

Seems from other posts, Denso plugs are always prone to misfiring due to burnout or fouls. Would look into HKS plugs.

 

[monusa]

Not familiar with Lap 3 but if still happening after setting to "stock" and you have changed plugs already and coil paks, get a torque wrench and check torque on plugs.....also, what are you using to gap plugs?????? Since you are using different plug mfg, what you are using to set the gap may be the "common denominator"

 

[Travis Wills]

Not familiar with Lap 3 but if still happening after setting to "stock" and you have changed plugs already and coil paks, get a torque wrench and check torque on plugs.....also, what are you using to gap plugs?????? Since you are using different plug mfg, what you are using to set the gap may be the "common denominator"

What torque should we use with the HKS plugs?

 

[monusa]

Should be in the range of 18 - 20 lb/ft(25 - 30Nm). This figure is based upon "thread size" and for the 3.3 I believe 14mm.....on the 2.0, thread is 12mm and range is 15 - 18 lb/ft so that range should be about right. should be able to look up actual value......I know it is a pain but if you are checking torque, may as well pull a couple/3 plugs and verify gap.

 

[ZedsGT]

It's not the torque on the plugs it's the lap 3.

 

[Stingerr]

Seems from other posts, Denso plugs are always prone to misfiring due to burnout or fouls. Would look into HKS plugs.

I already did I used Hks and densos I still have the misfire

 

[Stingerr]

I tried everything already I changed the coils , spark plug also I have used e85 mix
I still have the misfire

 

[Stingerr]

its worse, all cylinders are now misfiring

 

[ecko04]

Your spark plugs look terrible. I wouldn’t discount that there could be potential engine damage based on the look of those. Whatever material is on the plugs appears to be caked on.

I would do a compression and leak down test. If those results come back good then remove the Lap 3, drop in new plugs, and run the car as stock with premium fuel. If the misfires continue then a dealership visit is in your future.

 

[ZedsGT]

You shouldn't be running e85 in a car that isn't designed for e85. Take the lap 3 off, replace the plugs with a proper gap and run 91 or 93 only.

 

[ChaneRZ]

Lap3 off.

 

[Stingerr]

It's funny because before I was using the agency power chip without any problem

 

[Stingerr]

!

 

[ecko04]

We don’t know what’s causing the problem.
However, the first step in troubleshooting is to go back to the most basic form; and that’s why you’re getting replies to remove the tuner. The responses would be the same if you were using that other piggyback or something like a JB4.

 

[WRXtoStingerGT]

I'm going to sound silly but why not revert everything back to stock and take it in for warranty?

Your mods caused this issue or perhaps running the ethanol did it?