Changed plugs...interesting

[BigPelo]

How much did you pay for your plugs? I also have a 2013 SHO and it does what you describe at cold start. Might look into that.

[Needmoreboost]

How much did you pay for your plugs? I also have a 2013 SHO and it does what you describe at cold start. Might look into that.

$3.99 a pop.  They are made by NGK.  Lol

[05yellowgt]

Better that $20 a plug that we were first paying for 3v plugs.

[Mac98SHO]

Do you have the torque value for the spark plugs? I think I will be trying tis also, have the stumbling and load up when first started, especially in winter.

[JMR76]

I did mine at 132 inch pounds.

[SHOdded]

Which translates to 11 ft lbs, for all you guys out there with the GIANT torque wrenches   Be careful.

[FoMoCoSHO]

Thanks for the feedback on the new plugs, mine also runs rough on start up. Will have this done on next trip to the dealership.

[JMR76]

Regarding MAC98SHO

Just FYI,

For some reason the stock tune seems to run rough until warmup.  The 93 tune I have does not..  Even after running a tune for over a year I went back to stock for some service.  I've been running the stock for 2 weeks and noticed again it runs pretty rough at first.

[Needmoreboost]

Regarding MAC98SHO

Just FYI,

For some reason the stock tune seems to run rough until warmup.  The 93 tune I have does not..  Even after running a tune for over a year I went back to stock for some service.  I've been running the stock for 2 weeks and noticed again it runs pretty rough at first.

They both (stock and 93 tunes) ran rough for me.  But, .032-.038 mix and match factory gapping probably did not help the start up idle on either tune.  LOL

[EcoBrick Bob]

POOR Mac SHO98 is stuck in Minnie..soda... Winter is cruel there... even if you live south of Minneapoli.... and north of Mayoclinica.... I still remember his 2013 SHO at Brainerd where he stupidly let me ride on the track with his friend.  MOST FANTASTIC EXPERIENCE EVER!!!!  I think I owe Mac some tire rubber!!! Got to ride in a Pontiac GXP.. it was faster... but didn't have that passenger grab handle that kept me from riding on top of the driver!!! LOL (and then they told him to SLOW DOWN and not run over all the Gen 1 SHO's).

Mac's 2013 PP SHO was extremely balanced and we were really fast!!!!  My best 2013 experience...

[68_GT]

Needmorrboost what plugs did you replace them with ?

I was thinking to just pull my plugs regap to a consistent .30 and call it a day. My 2013 PP has 18k miles on it. I want the Xv1 tune with the 3bar map sensor, t-stat, and just a K&N filter only.

Anthony at LMS suggested I regap mine and possibly switch them out for the f150 ecoboost plugs. What's the difference in the plugs ?

[black99lightning]

What is the NGK part number to order?

[JMR76]

Regarding MAC98SHO

Just FYI,

For some reason the stock tune seems to run rough until warmup.  The 93 tune I have does not..  Even after running a tune for over a year I went back to stock for some service.  I've been running the stock for 2 weeks and noticed again it runs pretty rough at first.

They both (stock and 93 tunes) ran rough for me.  But, .032-.038 mix and match factory gapping probably did not help the start up idle on either tune.  LOL

I did some logging on the LMS new tune .  I'm still experiencing shudder above 4500 rpm.  Logging shows boost max at 15.7 psi and is showing knock sensor retard during this.  It also shows throttle actual drop from 100% down to around 60% during the retard.

Note:  this is usually only when in already driving 30mph plus the WOT.  For sone reason I don't notice it from a dead stop 0-80 mph.

[twnscrw13]

What is the NGK part number to order?

LTR7IX-11
6510
I changed to these plugs with a gap of just under 0.03 to just over 0.025. It helped a little but I'm still getting hesitation under WOT. If I go to the stock tune, runs perfectly. Called LMS and informed them and was told they'll look into it further.

[ivofe]

New to the forum. I have not done anything with the plugs but I also get the hesitation with both the 91 and 93 tune from LMS as mentioned here. I got an email from LMS they blamed the winter blend of fuel. I was wondering for the guys with the hesitation did you have DTC stored? I had a few, I didn't write them down just cleared them when I tried the re-tune to 91 to see if it would help. I'm thinking something with the tune. BTW I have a 2014 non PP SHO running the V7 tune, Air Rais CAI and 170 Stat. Still waiting to hear back from LMS since swapping to 91 did not help.