MSD 2 step caused check engine light

[k_aimone]

So I have an 07 full bolt on GT, and when I put the car on the two step I get a CEL for cylinder mis fire.


1. My tuner has never seen this before and offered to adjust my tune by turning all misfires CEL's off

2. The car acts like a raped ape until I get the light then it seems like it pulls power to compensate for a possible problem.

3. Long story short it ran a 12.4 with a shitty 60' so I'm kind of happy.

4. Have any of you 3v guys ever experienced this.


Ciao
Ken

 

[CPRsm]

It's not just 3v. See it on 500's and coyotes. Depends how long you're on it. Hit the box is indeed causing a misfire. The harder I built boost on my car the aoon it would show. Sometimes too long and it goes into limp mode

 

[wbt]

Never had an issue on my 5.0 and neither has kdanner. I have driven both cars at the track. Process for usage:

1. Stage the car.
2. Activate the 2 step.
3. Throttle to the floor.
4. Deactivate and go.

Not sitting on it longer than 5 seconds. I think your tuner can make the needed adjustments if you are on it longer than that.

 

[Chilliwack 42]

Last time I raced I threw a random misfire code. I also have an MSD 2 step, but I can't confirm yet if the 2 step caused the code. Mine didn't pull any timing when the CEL came on and infact ran it's best time. I've been using the 2 step for years without any issues. I'll be swapping plugs soon and pulling the valve covers just to check things out.

Did your tune adjustments help?

 

[k_aimone]

I have changed the tune yet. I will get it done after thanksgiving.