Just rebuilt my motor. Added long tubes better pistons and rods. Now getting an engine code that im misfiring. And i also lose power, but just for about 30 seconds then everything comes back normal for lets say 5 min and then again i lose the power for about 30 seconds and comes back.
Car sat for anout 8 months so im wondering about bad sensors messing with tune. Any ideas would be appreciated...Jim

 

If its intermittent like that my first thought would be a COP or two. Or connectors for said COPS.. Doesn't cost any money to re seat them.

 

When you put it all together did you do the crank relearn process? If not, you will get random misfire and power loss.

 

I dont believe I did that. Can I just do that on my tuner?

 

I found that on my tuner. So far working. Thanks for the tip!

 

Glad you found it and fixed it easily. Always start with the easy and cheap fix - and with the 2011+ quite often after work like you did the crank relearn is the issue.

You get random misfires because the computer hasn't been taught yet where the crank really is.