Colder Plugs on Stock Motor

[River8478]

Hello all,

I've recently a '14 MKS EB that's still under warranty for ten months or about 6000 more miles. As soon as the warranty is up, I plan on flashing a tune to the car and installing a 3 bar MAP I bought. With this, of course, also comes colder plugs. With the mileage the car has, I'd like to replace the plugs now as part of my "new to me" car maintenance, but don't want to have to replace them again in four months when I hit 70,000. Would I be looking at any significant adverse effects running a one-range colder plug on a stock car until I flash a tune to it? Thank you all!

 

[SHOdded]

Welcome!

The MKS will run richer in the meantime as the stock tune does not accommodate the colder plug.  Might see fuel economy dip a bit.  But nothing detrimental to the engine in the short run. Personally, I would just wait till ready to flash a tune, do it all at the same time.

 

[sholxgt]

I would get with your planned tuner.  I think most suggest running the Motorcraft SP534's tuned or not.

On my '13 MKS, I ran those plugs gapped at .030 when tuned and when running stock tune.  They worked perfect.

 

[glock-coma]

I was running sp542’s on the stock tune for around 3 weeks when I was letting a friend borrow the SHO.
No issues. They are gapped @.030

 

[802SHO]

Hello all,

I've recently a '14 MKS EB that's still under warranty for ten months or about 6000 more miles. As soon as the warranty is up, I plan on flashing a tune to the car and installing a 3 bar MAP I bought. With this, of course, also comes colder plugs. With the mileage the car has, I'd like to replace the plugs now as part of my "new to me" car maintenance, but don't want to have to replace them again in four months when I hit 70,000. Would I be looking at any significant adverse effects running a one-range colder plug on a stock car until I flash a tune to it? Thank you all!

Welcome River8478 and you picked a good one that MKS sure is nothing to mess with!  I wish you a lightning fast next 6000 miles so you can experience what some light mods will do on our engines....youll be blown away and like many of us be itching for MORE

 

[River8478]

Thanks for the advice everyone. I'll probably just pick up the plugs and wait to put them in.