Spark Plugs
Fleet Mechanic
Joined: Mar 2005
Posts: 1,603
Likes: 1
From: St Louis
Replace platinum plugs in a vehicle that was sold by the manufacture with platinum plugs. Replace standard plugs with standard plugs. Dont replace your plugs with higher heat range plugs because you will cause a pinging issue, or the reverse by replacing your plugs with lower heat range plugs unless pinging is an issue. Read your plugs as you pull them out. If they are a golden brown in coloration then you have the best plug for your engine. If they are any other color then you need a different plug.
I had a set of platinum plugs in my 1991 bronco 5.8L and they caused pinging and when I pulled them they were blistering. I put the standard plug, motorcraft, that ford shipped in the engine and the pinging disappeared.
I had a set of platinum plugs in my 1991 bronco 5.8L and they caused pinging and when I pulled them they were blistering. I put the standard plug, motorcraft, that ford shipped in the engine and the pinging disappeared.
New User
Joined: Jul 2005
Posts: 19
Likes: 0
[QUOTE=subford]Just look under your hood at the sticker, take that information to your auto parts store and buy a set of Motorcraft resistor plugs.
People talk about what is a better conductor of electricity but if you are using resistor plugs what difference does it make. I will take steel, I think they last longer and are less expensive.QUOTE]
1) Are Autolites the same/as good as Motorcraft? Reason asking, NAPA and AZ don't sell Motorcraft, at least around here. 2) Also, what benefits are there of resistor plugs? These quotes are from NGK's web,
"Q: When should I use a resistor spark plug?
A: NGK "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking.
NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.
They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.
In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion."
So, should all vehicles with computers use resistor plugs? Or do modern vehicles have different ways to suppress ignition noise? I'm confused, but enjoy researching/reading up on these kind of things, do you know of a good website that has good info? Thank you subford, you are one of my main members I use when I search for answers.
PS How do you get the quotes from threads in posts to be in the grey box like subford did to Nash_Taylor's in his post?
People talk about what is a better conductor of electricity but if you are using resistor plugs what difference does it make. I will take steel, I think they last longer and are less expensive.QUOTE]
1) Are Autolites the same/as good as Motorcraft? Reason asking, NAPA and AZ don't sell Motorcraft, at least around here. 2) Also, what benefits are there of resistor plugs? These quotes are from NGK's web,
"Q: When should I use a resistor spark plug?
A: NGK "R" or resistor spark plugs use a 5k ohm ceramic resistor in the spark plug to suppress ignition noise generated during sparking.
NGK strongly recommends using resistor spark plugs in any vehicle that uses on-board computer systems to monitor or control engine performance. This is because resistor spark plugs reduce electromagnetic interference with on-board electronics.
They are also recommended on any vehicle that has other on-board electronic systems such as engine-management computers, two-way radios, GPS systems, depth finders or whenever recommended by the manufacturer.
In fact, using a non-resistor plug in certain applications can actually cause the engine to suffer undesirable side effects such as an erratic idle, high-rpm misfire, engine run-on, power drop off at certain rpm levels and abnormal combustion."
So, should all vehicles with computers use resistor plugs? Or do modern vehicles have different ways to suppress ignition noise? I'm confused, but enjoy researching/reading up on these kind of things, do you know of a good website that has good info? Thank you subford, you are one of my main members I use when I search for answers.
PS How do you get the quotes from threads in posts to be in the grey box like subford did to Nash_Taylor's in his post?
Last edited by daszanto; Jan 6, 2007 at 09:44 AM.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
Motorcraft plugs are made by Autolite, so I would assume they are just as good. I can't think of any reason not to use resistor plugs, but maybe someone else knows better than me.
For the quotes, the tag [/quote] ends the quote and [quote=user name] begins the quote.
For the quotes, the tag [/quote] ends the quote and [quote=user name] begins the quote.
Last edited by EPNCSU2006; Jan 6, 2007 at 10:45 AM.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
Originally Posted by daszanto
So, should all vehicles with computers use resistor plugs?
Originally Posted by daszanto
Or do modern vehicles have different ways to suppress ignition noise?
Originally Posted by daszanto
Thank you subford, you are one of my main members I use when I search for answers.
Postmaster
Joined: Jul 2006
Posts: 3,978
Likes: 0
From: Central PA
My t=old truck ate a set of ngk (1500 miles) an then a set of Ac's (5500 miles) Put in Motorcraft copper and ran great for another 45000 till I parked it. I also checkplugs before install. About 2 out of 8 are iffy. Good luck
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