Random misfire (P0300 & others + sometimes no AC)

according to http://www.myautorepairadvice.com/p0300.html

What Causes a P0300 Code?
Low Fuel Pressure
Vacuum Leak
EGR system malfunction
Internal Engine Problems (such as low compression)
Less Common Causes
Faulty Coil
Faulty Spark Plugs and/or Wires
Camshaft or Crankshaft sensors
Ignition module
Computer

Does your scan tool report fuel pressure as the car is running?
 
Alrighty, so the latest. Thought I updated this thread weeks ago. My mistake.

-Replaced EGR
-New cam position sensor
-Removed, inspected, and re-clamped some vacuum lines just because
-Cleaned MAF
-Oil, filter, fuel filter
-New Crankcase Ventilation Retainer (the thing the PCV valve 'clicks' into on the valve cover. Mine wasn't clicking)
-New crankshaft position sensor (I looked back in the records. CPS "may not" have been replaced since it wasn't on my mechanics slips. Swore it was. Did it again anyway.)
-Disconnect battery, sit, drive
-AC tested and recharged

Now it's several hundred miles later. Maybe 15+ cold cranks or more

Still getting:
P0315 – Crankshaft position system variation not learned
P0300 - Random Misfire

Still not right. Sometimes engine shakes a little at idle like I have lopey cams, sometimes a specific COP showing misfiring. Never the same COP. Swapping COPS does nothing. Sometimes she drives perfectly, as in: put a glass of water on the engine and no ripples. Other times like a giant poop.

I'm reading conflicting information on the "crank relearn" procedure. What is the drive cycle on this?

Pretty much fed up. Guys, I'm not new to these cars. I know them. New PCM? AT this point, I almost have nothing left.

Anyone in New England want car?
 
From what I've read the crankshaft variation is learned during deceleration fuel cutoff when speed has been above 60mph. So you need to clear the codes and find some place where you can get it up to 60+, take your foot completely off the accelerator pedal and wait until the car slows down to 40 mph or below. Do it 3 times and it should learn that.

Instead of spending the big bucks on the AutoEnginuity system with the enhanced Ford package consider ForScan. OBDLink is a good communication device. Personally I use the MX as it will read the Medium Speed CAN that some of my newer Fords have but a LX will do everything that can be done on a Marauder. ForScan will give you almost all of the functionality of IDS, including Mode $06 and the ability to change some settings on some vehicles. The software included with the OBDLink will also give you Mode $06 for all brand vehicles.
 
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