In my honest opinion, they look pretty good Hoss! The browning up the ceramic insulator (something to do with oil particles) is normal and not going to affect the performance at all. The # of miles/km on them will be the bigger part of the question for such a decent looking plug.Time to change them??
Hey Joe,In my honest opinion, they look pretty good Hoss! The browning up the ceramic insulator (something to do with oil particles) is normal and not going to affect the performance at all. The # of miles/km on them will be the bigger part of the question for such a decent looking plug.
What is the gap?
How many miles on them?
*If it isn't broken, don't try to fix it =D (Specifically relating to an ST, spark plugs seem to wear out of tolerance pretty quick!). Also, preventative maintenance is key to longevity.
Looks like it doesn't have that kinda rowdy attitude for a while now. That's why I decided to check the plugs.Well, factory maintenance says way longer, but I had to change my 1st set of stock Ford spark plugs @ 30k for some random misfire issues & loss of power.
If they feel like the car is running well, then you very well might keep them for 100k miles and save $. If, on the other hand, the car seems to have lost some timing or aggressive 'attitude' during normal driving then it could be worth it to change them.
Are you running a tune on your car?
Tell me about it. My friends 2013 ST has now clocked 387K Kms (242K miles). He changed his original spark plugs at 200K Kms, original rotors at 310K Kms and still is on original struts & dampers. He is still on original Clutch and and had a Transmission oil changed for the first time recently. 😂 He has been tuned stage 3 (stratified) since the beginning. Last month his fuel pump failed. His is mostly a lot of highway driving.Hi all, I just wanted to hop in and give you guys a chuckle.
My 2013 ST2 has just clicked over 155K miles (not KM) on the original plugs.
It's running pretty great, except for the stupid CEL and rough idle caused by the evap valve.
I intend to address that myself shortly, since I've already had it back to Ford, and they claim there's "nothing wrong" with my car, and that the recall isn't required. I guess CELs with DTCs calling out fuel system vacuum issues just pop up on their own? lol
Anyway, I just ordered a set of the NGK 95605 from Rock Auto. I got the set of 4 for $39.54 with tax and shipping. Hard to beat!
No need to replace the coils and factory spec plugs gapped from 0.30 to .032.Hi all!
I’ve read through this terrific thread, an amazing amount of info, which also has me somewhat confused.
I’m the original owner of a 2014 ST, base model, currently has 120,326 miles. I had to replace the turbo @111k miles. Replaced with stock turbo at the Ford dealership. Plugs are original, I went through all my receipts, none have plugs replaced. Car runs great, idles smoothly, but about a month ago I noticed some stumbling at WOT accelerating onto the highway. My commute is 70 miles round trip. So my question is which plugs, and should I replace the coil packs? Is there a coil pack & plug combination that would improve the performance a bit without I’ll effects to the motor? I’ve pretty much followed the scheduled maintenance since new.
Thanks in advance, Glenn