SPark Plug Difference
09-27-2018, 12:32 PM
#1
Junior Member
Thread Starter
Join Date: Sep 2018
Location: Arizona
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
SPark Plug Difference
What is the difference between a Motorcraft SP450 ans a SP450a? both are listed for my F150 the difference in price on rockauto is like $.30 a pice and I just was wondering is one hotter than the other? and which would be best for my old truck.
She is an '93 F150 5.0 with 215K miles on her that I have barely ever done a thing to. Recently she has started a loss of power issue so I decided id start with a tune up since I cant even remember when I did the last one but Its been Ages thats for sure.
She is an '93 F150 5.0 with 215K miles on her that I have barely ever done a thing to. Recently she has started a loss of power issue so I decided id start with a tune up since I cant even remember when I did the last one but Its been Ages thats for sure.
09-28-2018, 10:40 PM
#2
Member
Join Date: Jan 2018
Location: Memphis, TN, Earth, Milky Way
Posts: 11,256
Received 1,731 Likes
on
1,487 Posts
EFIs don't need tune-ups; that's only for carburetors. But all vehicles need maintenance, and sometimes repairs. Get a Haynes manual, read it (at least once cover-to-cover), and catch up all the recommended maintenance.
(phone app link)
Using the highest-quality parts you can find & afford (instead of the cheapest, like most people do) and using the proper techniques pays off.
Doesn't the site you're shopping say what the difference is? Post the link that shows both plugs.
(phone app link)
Using the highest-quality parts you can find & afford (instead of the cheapest, like most people do) and using the proper techniques pays off.
Doesn't the site you're shopping say what the difference is? Post the link that shows both plugs.
10-14-2018, 01:05 PM
#3
Junior Member
Thread Starter
Join Date: Sep 2018
Location: Arizona
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
EFIs don't need tune-ups; that's only for carburetors. But all vehicles need maintenance, and sometimes repairs. Get a Haynes manual, read it (at least once cover-to-cover), and catch up all the recommended maintenance.
(phone app link)
Using the highest-quality parts you can find & afford (instead of the cheapest, like most people do) and using the proper techniques pays off.
Doesn't the site you're shopping say what the difference is? Post the link that shows both plugs.
(phone app link)
Using the highest-quality parts you can find & afford (instead of the cheapest, like most people do) and using the proper techniques pays off.
Doesn't the site you're shopping say what the difference is? Post the link that shows both plugs.
No the site I am shopping on does not list the difference, if it did I would not have asked here, And A Haynes manual is your ultimate suggestion? I admit they are handy, and have their uses but they often glaze over important details and sometimes miss information all together. Such as the distinction between these two spark plugs. Both will work for my truck but I want to know if one is specified for a specific high heat application, or some other specific detail. I have since bought plugs so it no longer really matters.
10-14-2018, 02:14 PM
#4
Senior Member
That's a weird one. They show as either is proper for a whole list of cars. And the 450 is shown as a cross-ref for the 450a, but not vice-versa. Seems like the "a" would be some minor change, maybe for manufacturing or for improved design. Worthy enough for an "a" but not for a complete new number.
Also possible that the "a" is an economy, or lower quality designation, like Standard products T series.
https://www.rockauto.com/en/parts/mo...park+plug,7212
Also possible that the "a" is an economy, or lower quality designation, like Standard products T series.
https://www.rockauto.com/en/parts/mo...park+plug,7212