Sp 542

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Roger33

Member
Joined
Aug 1, 2018
Posts
27
Reaction score
24
Location
Torrance
I have a 2018 that has 600 miles on it and I thought that the ignition was breaking down under hard acceleration and figured that I would give it time.....I am impatient so I installed the 542'2 in my truck yesterday and the issues are completely gone. I am n California and I am wondering if the trucks that seem to all have these issues with the hotter plugs are based on the West Coast....could be a California Emission requirement to run those plugs. In any case, the colder plugs resolved my issues.
 

Quiker

Full Access Member
Joined
Jan 14, 2017
Posts
106
Reaction score
152
Location
Austin, TX
I just ordered SP-542 - received SP-578 - called the dealer - sure enough they tell me 578 superseded 542..... anyone else find this out?
 

TXRaptor

FRF Addict
Joined
Sep 15, 2010
Posts
1,851
Reaction score
1,044
This thread was from a year ago, so it is possible the new plugs supersede the 542s I have installed in my truck.

Please report back if you find out for sure.
 

tlnt60

Full Access Member
Joined
Jan 7, 2019
Posts
115
Reaction score
33
Location
Arizona
This thread was from a year ago, so it is possible the new plugs supersede the 542s I have installed in my truck.

Please report back if you find out for sure.

the new plugs for sure supersede the 542s. I verified with ford and 3rd party. I will install this weekend and see how it does. I have a 17btw
 

nikhsub1

FRF Addict
Joined
Mar 5, 2017
Posts
4,104
Reaction score
4,688
Location
Los Angeles
For anyone looking for sp-542's, I don't believe the 578's are the same as the 542. I think that part number M-12405-35T is the equivalent to the old sp-542.
 
Top