Feels like the transmission is slipping

[EcoBrick Bob]

Flashing check engine light means you have a misfire, nothing to do with the trans.

That was my opinion earlier as I have seen that same situation and car stumbles during misfire.  I changed out my plugs to cooler ones and to .30 gap and haven't had any issues since.  Saw this situation both when not tuned and once when tuned.

 

[melc]

That was my opinion earlier as I have seen that same situation and car stumbles during misfire.  I changed out my plugs to cooler ones and to .30 gap and haven't had any issues since.  Saw this situation both when not tuned and once when tuned.

Bob,

Can you provide the part number of the plugs you used? Don't they usually come pre-gapped from the factory?

Thanks,

 

[EcoBrick Bob]

That was my opinion earlier as I have seen that same situation and car stumbles during misfire.  I changed out my plugs to cooler ones and to .30 gap and haven't had any issues since.  Saw this situation both when not tuned and once when tuned.

Bob,

Can you provide the part number of the plugs you used? Don't they usually come pre-gapped from the factory?

Thanks,

NGK LTR71X-11  6510  Purchased on Amazon.  These are the same plugs that BPD used.

I re-gapped to .30  You need to be careful when changing the gap, but a few firm taps usually does it, combined with gauge.

Previously I used stock plugs  and used them pre-gapped.

 

[BiGMaC]

Flashing check engine light means you have a misfire, nothing to do with the trans.

That was my opinion earlier as I have seen that same situation and car stumbles during misfire.  I changed out my plugs to cooler ones and to .30 gap and haven't had any issues since.  Saw this situation both when not tuned and once when tuned.

Good to know that the tune isn't the root cause.

 

[curry67]

Where exackly is that wire do i have to take off the cover?
Its the weirdest feeling it just like sorta skips sometimes its hard to show someone cause sometimes i cant get it to do it and it runs amazing. Ive noticed the engine doesnt sound the greatest at idle im thinking of just changing the plugs and wiring will fix both things.

 

[SHOdded]

HTH.  http://www.ecoboostperformanceforum.com/index.php?topic=554