AC Delco vs. Motorcraft

[Ozwynn]

hhhmmmm I got 30,000 miles on my bosh platinum plugs and they are still clean. I put champion gold truck plugs in the motorhome because I didn't have to go to ford to get them. spark plug is a spark plug is a spark plug. just watch things like splitfire and those bosh 4 prong pos things, those extra prong thingies like to break off and blow a hole in the top of your piston.

 

[Bob Ayers]

motorcraft plugs are made by autolite. ap764 is the plug required for a 93 3.0 and the plug gap is .044. always use a wire type feeler gauge, not a ring guage. multigap plugs cause misfiring on oe coils, splitfires and bosch 4s are a waste. iridium type plugs dont do well under oe coil performance either. acdelco plugs dont hold up well in a ford, friend of mine found this out on accident. ford vehicles run the best w/ autolite plugs as they were designed for them.

WRONG! Motorcraft and Autolite plugs are made by a company named Honeywell, a division of Allied Signal.

 

[Bob Ayers]

Spark Plug "tip":


When changing spark plugs, always use Motorcraft double platinum's, or fine wire platinum's. They are designed to be
the correct heat range for your 2.3L, 3.0L, or 4.0L engine, as well as Ford's EDIS.

A word of caution about gapping these plugs. On the double platinum's, there are platinum beads on the center electrode, as well as the outer electrode:

Make sure you use the "wire" type of spark plug gauge, NOT the "circular" type of gauge.
When using the "wire" type of gauge, DO NOT use force to insert it in the gap, the platinum
beads can be easily damaged. To adjust the gap, bend the outer electrode close to the
spark plug threads.


Use one of these type of gap gauges:

http://www.sears.com/shc/s/p_10153_12605_00940816000P


http://www.sears.com/shc/s/p_10153_12605_00993925000P


DO NOT use this type of gap gauge:

http://www.sears.com/shc/s/p_10153_12605_00999827000P

 

[fleck]

Could I be having a problem with my Autolites because I used a circular gapper?

The plugs look fine, I don't think Sea Foam has ruined anything and when I first start her up the truck stutters all over the fuggin place, after warms up its a bit better but touchy.

 

[rurouni20xx]

well if the ring gapper messed up the upper tip and causes the trk to arc at an angle one on side of the plug to the other throwing your timing off yes that could be a problem. but for the most part ring gappers space the plug too far and damage the upper electrode, thats why you always use a wire gage to prevent this.

 

[Bob Ayers]

well if the ring gapper messed up the upper tip and causes the trk to arc at an angle one on side of the plug to the other throwing your timing off yes that could be a problem. but for the most part ring gappers space the plug too far and damage the upper electrode, thats why you always use a wire gage to prevent this.

The difference in the coil discharge time will be usecs, worse case, which will not be seen in timing at all. Mis-fire, however, is a possibility.

 

[MikeInIdaho]

Do you guys think Autolite iridium plugs with a manufacturers' heat range of 4 (same as factory plugs) would be OK to use in an '06 duratec? Just curious.

 

[Bob Ayers]

Do you guys think Autolite iridium plugs with a manufacturers' heat range of 4 (same as factory plugs) would be OK to use in an '06 duratec? Just curious.

Don't waste your money, go with the Motorcraft double platinums, or finewire platinums, for the best performance.

 

[rurouni20xx]

The difference in the coil discharge time will be usecs, worse case, which will not be seen in timing at all. Mis-fire, however, is a possibility.

by throwing off the timing i mean misfire. a spark that goes all over the plug will throw off the timing at the plug end and cause misfiring. the correct gap and a good plug will cause consistent firing in the same place at the plug and make the timing perfect. i see this all the time on single cylinder engines which depend on that one spark event to run, multicylinder engines will simply stumble a bit and keep running if one or two cylinders have this problem. low speed bucking on 4 cylinder engines is caused by this as well if one cylinder has this issue.

 

[Bob Ayers]

by throwing off the timing i mean misfire. a spark that goes all over the plug will throw off the timing at the plug end and cause misfiring. the correct gap and a good plug will cause consistent firing in the same place at the plug and make the timing perfect. i see this all the time on single cylinder engines which depend on that one spark event to run, multicylinder engines will simply stumble a bit and keep running if one or two cylinders have this problem. low speed bucking on 4 cylinder engines is caused by this as well if one cylinder has this issue.

Timing means the spark & combustion happened, but at the wrong time. Misfire means the spark may or may not have happened, but combustion DID NOT happen.

 

[rurouni20xx]

right i didnt do so good in english class so i have a bad tendency to misuse terminology. i have a bad habit of interchanging the terms spark timing and misfire. plz forgive my habits.