Spark Plugs - Taurus Car Club of America : Ford Taurus Forum
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post #1 of 19 (permalink) Old 07-29-2012, 07:27 AM Thread Starter
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Spark Plugs

Which would be better for me to use on my 2004 Duratec with COP not a Flex Fuel:

MOTORCRAFT Part # SP433 {#AGSF32WMF4} Finewire Platinum
Gap: .054; Type - Standard Service Plg; 6 required per vehicle

or

AUTOLITE Part # APP104 {#APP764} Double Platinum (Rebate/Promotion Available!)
GAP .054

These are on Rock Auto. I went on the Motorcraft page and put in my VIN and they have several plugs listed there. The only one they have listed from Rock is the Motorcraft finewire obviosuly. I keep reading to use a "double platinum" but it seems like these are used on Flex Fuel engines, not regular engines. Maybe that view is wrong.
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post #2 of 19 (permalink) Old 07-29-2012, 08:11 AM
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Both are good plugs, I have always used the fine wires in my 96 DOHC 24V but the double plats are great too!! Either would be just fine for you.
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post #3 of 19 (permalink) Old 07-29-2012, 08:58 AM
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I have the APP-104's in my car with no issues.

I believe that Autolite and Motorcraft are made by the same manufacturers so the only difference is Platinum compaired to double Platinum.

John
2007 Pontiac Torrent, 2013 Hyundai Sonata GLS
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post #4 of 19 (permalink) Old 07-29-2012, 10:22 AM
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Quote:
Originally Posted by Bob R View Post
Which would be better for me to use on my 2004 Duratec with COP not a Flex Fuel:

MOTORCRAFT Part # SP433 {#AGSF32WMF4} Finewire Platinum
Gap: .054; Type - Standard Service Plg; 6 required per vehicle

or

AUTOLITE Part # APP104 {#APP764} Double Platinum (Rebate/Promotion Available!)
GAP .054

These are on Rock Auto. I went on the Motorcraft page and put in my VIN and they have several plugs listed there. The only one they have listed from Rock is the Motorcraft finewire obviosuly. I keep reading to use a "double platinum" but it seems like these are used on Flex Fuel engines, not regular engines. Maybe that view is wrong.
I'm using the specified finewire iridium enhanced center electrode with platinum pad ground sidewire plugs in both of my Ford rides & in the wifes Neon, we enjoy quicker year round starts.
Autolite is said to make the Motorcraft plugs to Fords specs, so with the autolite rebate & Advance Auto online discount promo code I got them for a little over $2 ea last year.
Here are some sparkplug thoughts that might be helpful in making up your mind about which design plug design to use & why.
https://www.taurusclub.com/forum/82-m...-tutorial.html

94 Taurus GL 3.8L PEP204A
99 Ranger XLT 4dr 4.0L 5spd Auto
Payload & Tow Pkg

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post #5 of 19 (permalink) Old 07-29-2012, 10:47 PM
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motorcraft plugs and wires in mine - picked up the car a few months back for 700$
took motorcraft plugs out of it and motorcraft wires that said "1999" on them, must have never been down on that car in 120,000

sheesh
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post #6 of 19 (permalink) Old 07-30-2012, 01:51 PM Thread Starter
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I purchased 6 Motorcraft SP433 Iridium Platinum plugs from Advance Auto Parts for $2.99 ea.

I checked the gaps on all six and have from .056 -.062. None are .054. How close to .054 do they have to be?

Last edited by Bob R; 07-30-2012 at 01:59 PM.
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post #7 of 19 (permalink) Old 07-30-2012, 06:31 PM Thread Starter
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Quote:
Originally Posted by Bob R View Post
I purchased 6 Motorcraft SP433 Iridium Platinum plugs from Advance Auto Parts for $2.99 ea.

I checked the gaps on all six and have from .056 -.062. None are .054. How close to .054 do they have to be?
I re gapped them all to .054.

Another question...do I have to replace the UIM gaskets after I pull it to change the plugs?

BTW....if i were head of engineering at Ford and and engineer gave me an engine design where you had to pull the intake manifold to change spark plugs...I wouldn't only not approve the design...I'd FIRE the SOB!
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post #8 of 19 (permalink) Old 07-30-2012, 08:48 PM
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Quote:
Originally Posted by Bob R View Post
I re gapped them all to .054.

Another question...do I have to replace the UIM gaskets after I pull it to change the plugs?

BTW....if i were head of engineering at Ford and and engineer gave me an engine design where you had to pull the intake manifold to change spark plugs...I wouldn't only not approve the design...I'd FIRE the SOB!
I set mine to min specified gap, as the gap is always opening up with time, so the spark gap will stay in spec longer & having the gap on the min side will help a little with cold winter starts & it slightly advances the spark which will help some too.

I also butter the spark plug threads with a light coating of high temp nickle anti-sieze compound, to prevent them siezing in place, then torque to the Min side of spec, to allow for the anti-sieze lube effect.

I also butter the outside plug insulator & inside both plug wire boots with light coating of DowCorning or GE silicone grease, to prevent flashover on those wet dewy, or damp, rainy day starts.

I'd have the designers work on the assy line & at the Dealers, turning wrenches for at least 6 months each, before they'ed ever set their buns down at a CAD station to design something for me!!!!!.

94 Taurus GL 3.8L PEP204A
99 Ranger XLT 4dr 4.0L 5spd Auto
Payload & Tow Pkg

Details are trifles, but trifles make perfection & perfection is no trifle (Ben Franklin)
Our signature is a sign of a job completed, autograph your work with excellence.

Last edited by pawpaw; 07-30-2012 at 08:50 PM.
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post #9 of 19 (permalink) Old 07-30-2012, 09:10 PM
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Bob, iirc, the gap spec is .052-.056, so, .054 (middle) is good. If the uim gasket isn't damaged, I wouldn't replace it, but it's your call.
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post #10 of 19 (permalink) Old 07-30-2012, 10:37 PM
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Quote:
Originally Posted by Bob R View Post
I re gapped them all to .054.

Another question...do I have to replace the UIM gaskets after I pull it to change the plugs?

BTW....if i were head of engineering at Ford and and engineer gave me an engine design where you had to pull the intake manifold to change spark plugs...I wouldn't only not approve the design...I'd FIRE the SOB!
The 96-03 upper intakes don't overhang that bank of the engine. All the newer duratecs do it. 3.0 from 04 onwards. The 3.5 does it, so does the 3.7 :\

--Nick
-'66 Ford Country Squire wagon 390/C6
-'87 & '89 Mercury Colony Park wagons 302 EFI/AOD
-'90 Lincoln Town Car 302 EFI/AOD
-'03 Lincoln Town Car 4.6L/4R70W

former '87 Taurus 3.0 GL sedan, '87 Taurus 3.0 GL Wagon, '97 Taurus SHO 3.4 V8 sedan, '00 Taurus SEL 3.0 24V
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