If you clear the DME codes - and then try the stomp test again and still get the "1444", my bet is the CPS is bad... Crank Position Sensor for whatever reason on the M42's does not and will not throw a code or CEL to show that it's bad. I don't know why that is, but in 99% of the threads posted on here (including my own very lengthy one a while back) AND on those posted on other BMW forums, a new CPS in an M42 should start that car... Especially if you have tried all of the aforementioned tests & component replacement (fuel filter, fuel pump is working, fuel pump relay is working, fuel pump fuse is good, DME is getting power if it shows ANY codes or blinks when doing the stomp test, DME relay is working, etc etc).
There are quite a few "non-start" threads that relate back to a failed CPS - definitely search them out on here, especially the one initially made by me - which had TONS of helpful info in there for the next person needing non-start help.
A bad ICV will cause some sporatic non-start or idle/drivability issues. If when turning the key ON, when you touch the ICV - is it humming or buzzing? If so, the ICV is powered. If there is NO hum or buzz, the ICV is dead. Take a small hammer and tap the outer casing, do you now feel any hum or buzz? If there is a hum or buzz, then try starting the vehicle - IF the vehicle starts, then the ICV needs to be cleaned (it's carboned up inside). After cleaning it, the car should run or operate for quite some time, enough so that you don't need to immediately buy another ICV RIGHT NOW... A competely failed ICV will throw a code - so in order to determine if it's bad - you first need to clear any/all stored codes in the DME.
best of luck!
