I went to the dealer and asked for plugs for my 96 4.0L.
They went through 3 part number changes and came up with AGSF42FM, looks like a bosch plat plug with the tiny wire electrode. These aren't the correct plug's are they? All I want is double plat plugs...


Dick

 

Go to an auto parts store and ask for the correct Autolite applications double platinum. Bosch plugs are terrible, and the electrodes wear down quickly. Or check out rockauto.com, they have the correct Autolite OEM part.

 

I don't think so. Not any more...
http://www.autolite.com/products/doublePlatinum.php

Dick

 

Hmm, guess thay are correct then. The narrow point doesn' mean its bad, unless it is a Bosch. If the Ford dealership is approveing them, then I assume its because either Ford or Autolite have designed them to meet the original specs. And it does say they are designed for DIS systems. If in doubt, get the old part #, anyone have it by the way?

 

Autolite Double Platinum part number is APP765, gap is 0.54"....
make sure they DON'T sell you wrong plug, AP765 single platinum

their search engine is NOT working correctly

call Autolite's Hot Line North America Product Assistance - Call 1.800.890.2075


http://www.autolite.com/carcare/faq.php#q12
Q. What is DIS?
A. DIS is different from standard electronic ignition systems in that the voltage surges from the coil passes through the plug wire to the plug. With the evolution of DIS, because spark plugs in a DIS system fire in a looped system rather than a single spark for those in a conventional system, the spark plug is required to be stronger and more robust. The Autolite® Double Platinum spark plug, which features platinum on both tips of the electrode is designed to withstand the added requirements of a DIS system. So when the DIS ignition system fires, the platinum on both tips of the electrode ensures the plug tip does not wear down AND maintains the gap thereby extending the life of the plug. With the extended life of the Autolite® Double Platinum spark plug, vehicle owners won’t have to incur the labor costs of changing their spark plugs as often since these plugs last 2 to 3 times longer.

forget about Iridium tips...only needed in the new direct gas injection stratified charge lean mix engines..... wasted money on Aero engines at $10+ per hole, won't last any longer than double platinums

what dealer parts dept. was trying to pawn off on you was single plat. Motorcraft plug which is wrong one for Aero 4L w DIS electronic ignition....correct M/C # is AGFS42PP for double plat...
dealer price is a rip off over auto parts store and only last resort

<TR><TD class=subheader>
http://www.motorcraft.com/products.do?item=18
Platinum Spark Plugs
</TD><TD></TD><TD align="right" rowspan="4"></TD> </TR><TR><TD class=bodytext>The same premium-quality spark plugs that have 100,000-mile replacement intervals, used in many new Ford Motor Company vehicles, are available as replacement plugs for earlier model vehicles. Platinum's high melting point provides superior resistance to erosion. This results in 60,000- to 100,000-mile intervals between spark plug changes while maintaining optimum engine performance. Platinum plugs are designated by the letters "P," "PP," "E," "EE," "F," or "FE" in the part number suffix. </TD></TR><TR><TD class=subheader>
Platinum Spark Plug Groups

</TD></TR><TR><TD class=bodytext><LI class=bodytext xmlns:msxsl="urn:schemas-microsoft-com:xslt">Single Platinum (P & E)<LI class=bodytext xmlns:msxsl="urn:schemas-microsoft-com:xslt">Double Platinum (PP & EE)<LI class=bodytext xmlns:msxsl="urn:schemas-microsoft-com:xslt">Finewire Platinum (F & FE)</TD></TR>

 

The dealer can no longer get anything but AGSF42FM All old numbers are superseeded to it. Seems that autlite has done the same thing..I will see if I can get APP765.

Thanks

Dick

 

good info 99f350,

called Autolite customer line.
looks like Autolite has discontinued their double plats...
they want us to use their fine wire iridium/plats Extreme Performance part #XP105
darn, I hate paying $10 a plug

 

What about the 3.0? They recommend AGSF32PMF6.

 

My supplier had some APP765's But maybe not for long.


Dick

 

I got the plugs. Now for the fun part.


Dick

 

Well I got them changed not too bad. My hands are way too big for the job but It be done. All of the gaps were over .080. All the new plugs had to be set to .054 they were about .049 or so. Thanks for the help.


Dick

 

For anyone in Canada looking for the Autolite APP765's, "Bumper to Bumper" has them as a normal stock item. $9.99 each.

 

They can be had for less than $3..

 

Where do I get them for that price? Please share!

 

I'll check tonight and get back...