1995 F150 4.9 - Too much confusion over which module fits my truck. Oh Really's has the DY1075 Motorcraft listed, but I try that thru Amazon and they say it doesn't fit my truck.
- Ford Parts online sez it uses a DY533. Don't get me started on the aftermarket guys like Standard or NAPA....
Mine is fender mounted in the heat sink.

 

 

AND, oReally's and NAPA call for the same part number regardless if it's a Inline 6 or a V8! What gives?
Ford online sez they're 2 different part numbers.

 

The ignition module doesn't care how many cylinders you have, it just powers the coil based on the signal it's getting from the distributor (which varies based on cyl count). It doesn't know the difference between 4cyl at 3000rpm, 6cyl at 2000rpm or a v8 at 1500rpm.

 

Maybe this will help.
https://www.ford-trucks.com/forums/1...black-icm.html

 

Not having much luck finding a genuine Motorcraft Module.
Standard Ignition has 2 different black ones, an LX241 and an LX241T...
What's the "T" stand for? Anybody know?

 

The "T" refers to the "Economy" brand, cheaper.

Search on Amazon for the correct Black "Fender Mounted" ICM.

NOTE: I just searched on RockAuto, using the "Part Number" for "Motorcraft DY1077. It's $57.79

It's available, though not listed in the correct subcategories for Ford trucks for 1995-1997.

 

And that DY1077 will work on my 4.9?

 

Yes.

As was stated earlier, the ICM doesn't care what size engine is in the truck. The PCM is what determines what ICM is needed.

 

We need to start our own part numbers library....

 

Traced my problem to a set of bad spark plugs...
I am assuming somebody dropped the box of spark plugs before I got them and a couple of them have hairline cracks (I can't prove this, but I JUST put them in)
I replaced all six again and the problem cleared up.