Which Motorcraft Plugs for 1999 4.6? - F150online Forums



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Which Motorcraft Plugs for 1999 4.6?

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  #1  
Old 01-04-2011, 08:37 PM
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Which Motorcraft Plugs for 1999 4.6?

This has probably been asked before, but what is the correct motorcraft plug for my 1999 F-150 with the 4.6 Windsor? Auto parts stores list 2 different ones - SP413 (Original Equipment Nickel Spark Plug) and SP432 (Original Equipment Finewire Single Platinum Spark Plug). Truck only has 69,000 on it but being the tinkering type, I may change them soon.
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Old 01-04-2011, 10:48 PM
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I believe they are both the right plug, ones a nickle plated plug, ones platinum. I would opt for the platinum.
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Old 01-04-2011, 10:49 PM
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x1,000,000,000,000,000 for the platinum
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  #4  
Old 01-04-2011, 11:33 PM
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Quote:
Originally Posted by aridranger03 View Post
This has probably been asked before, but what is the correct motorcraft plug for my 1999 F-150 with the 4.6 Windsor? Auto parts stores list 2 different ones - SP413 (Original Equipment Nickel Spark Plug) and SP432 (Original Equipment Finewire Single Platinum Spark Plug). Truck only has 69,000 on it but being the tinkering type, I may change them soon.
Use the Iridium Fine wire. Motorcraft has one for yours.
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  #5  
Old 01-04-2011, 11:43 PM
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Thanks everybody! I'll go with the SP432s. Kinda funny that they're the same price. Now I need to decide when to do them. I plan on cleaning the TB and checking the mpgs soon too.
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  #6  
Old 01-05-2011, 12:53 AM
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I've got the 432's in my 97 4.6 and couldn't be happier
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Old 01-05-2011, 01:06 AM
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NO antiseize, 28 ft/lb.
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Old 01-05-2011, 01:17 AM
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Yea, their all good, some just have a healthier longevity. I'll list them -

1. Single Plat
2. Double Plat
3. Iridium

Iridium being the best. They still don't have Iridium's (Motorcraft) for the 5four, but I believe they do for the 4six, go figure. I had to go with Denso's for good fine wire. Good Plugs so far. Mileage went up a little for me, but that doesn't happen for everyone.
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Old 01-05-2011, 01:46 AM
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Originally Posted by jbrew View Post
Yea, their all good, some just have a healthier longevity. I'll list them -

1. Single Plat
2. Double Plat
3. Iridium

Iridium being the best. They still don't have Iridium's (Motorcraft) for the 5four, but I believe they do for the 4six, go figure. I had to go with Denso's for good fine wire. Good Plugs so far. Mileage went up a little for me, but that doesn't happen for everyone.
Who sells motorcraft iridiums? O'reilly, Autozone, and Advance don't list them online.
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Old 01-05-2011, 01:48 AM
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Originally Posted by aridranger03 View Post
Who sells motorcraft iridiums? O'reilly, Autozone, and Advance don't list them online.
Have you tried Rock?

http://www.rockauto.com/
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  #11  
Old 01-05-2011, 02:03 AM
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I guess they don't have the Iridium :o my bad. Here's what I list, -

SP413

MOTORCRAFT SUPPRESSOR SPARK PLUG, NICKEL, SOLD INDIVIDUALLY -- 0.044 in. gap size, alternative plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.

* Series: Suppressor
* Quantity Sold: Sold individually
* Product Fit: OE replacement
* Warranty: Motorcraft's 12-month or 12,000-miles warranty

Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 4.6L; "CNG"
* 1999: XLT; 8 Cyl 4.6L; "GAS"
* 1999: XLT; 8 Cyl 4.6L; "VIN W"
__________________________________________________ _____

SP493

MOTORCRAFT SUPPRESSOR SPARK PLUG, SINGLE PLATINUM, SOLD INDIVIDUALLY -- 0.034 in. gap size, alternative plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.

* Series: Suppressor
* Quantity Sold: Sold individually
* Product Fit: Direct fit
* Warranty: Motorcraft's 12-month or 12,000-miles warranty

Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 4.6L; "CNG"
* 1999: XLT; 8 Cyl 4.6L; "GAS"
__________________________________________________ _________

SP432

MOTORCRAFT SUPPRESSOR SPARK PLUG, FINEWIRE PLATINUM, SOLD INDIVIDUALLY -- 0.054 in. gap size, standard service plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.

* Series: Suppressor
* Quantity Sold: Sold individually
* Plug Type: Resistor
* Electrode Core Material: Copper
* Electrode Tip Material: Platinum

* Product Fit: Direct fit
* Warranty: Motorcraft's 12-month or 12,000-miles warranty

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Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 4.6L; "VIN W"
__________________________________________________ ______

AWSF32E

MOTORCRAFT SPARK PLUG -- Platinum plus; A high quality, direct fit OE replacement spark plug; 12-month or 12,000-mile Motorcraft limited warranty.

* Quantity Sold: Sold individually
* Product Fit: OE replacement
* Warranty: 12-month or 12,000-mile Motorcraft limited warranty

Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 4.6L;
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  #12  
Old 01-05-2011, 02:13 AM
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For an Iridium, you would either go with "Denso" or "NGK". Like I said, ALL are good plugs. An Iridium fires better, longer. Stick within those tree manufacturers. -

Motorcraft
Denso Iridium
NGK Iridium

Motorcraft offers the fine wire plat. That's the best one there for Motorcraft.
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  #13  
Old 01-05-2011, 02:15 AM
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BTW- I must have confused their fine plat for a fine wire Irid. Not sure, I thought they made an Iridium, for something ?
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  #14  
Old 01-05-2011, 02:19 AM
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Ahh, here's their Iridium, but it's for the 5four, -

SP479

MOTORCRAFT SUPPRESSOR SPARK PLUG, PLATINUM IRIDIUM, SOLD INDIVIDUALLY -- 0.054 in. gap size, standard service plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.

* Series: Suppressor
* Quantity Sold: Sold individually
* Plug Type: Resistor
* Electrode Core Material: Copper
* Electrode Tip Material: Platinum

* Product Fit: Direct fit
* Warranty: Motorcraft's 12-month or 12,000-miles warranty

View more View less
Fits the following 1999 Ford F-150 submodels:

* 1999: XLT; 8 Cyl 5.4L; "BI-FUEL"
* 1999: XLT; 8 Cyl 5.4L; "GAS"

_________________________________________

That doesn't make sense yet tho lol. Not to me anyway.
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  #15  
Old 01-05-2011, 02:47 AM
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Thanks jbrew! I'll prob stick with the motorcraft platinum to keep it less confusing for me. The SP432 plugs are $4.69 ea.
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