have been experiencing cold temp. starts.its as if the glow plugs are not heating,after doing bill's mod and buying the new module at ueroparts and now hooking them to a momentary switch via the mod fuse box directly to battery,it starts or i should say does'nt start like the plugs are not heating.i'm getting 12v to the disconnected glow plug wire at the plug,i took out #1 gp and bench tested it as i thought maybe the 1 year old gps had shorted.it lit up just as it should,which leads me to believe the other 4 gps are good as they ohm out at the external fuse block mod.when removing #1 gp i did notice that was gunked up and almost wet as if it had never been heated.short of taking a plug out and testing on the top of the motor with the harness still connected i am at a loss.i did scan it on a snap-on solus and came up with 2 maf sensor codes.could this have anything to do with the no cold start?it runs and starts fine when warm.i'm using desiel power additive in the fuel and the fuel filter was replaced about 5000 miles ago at the most.fuel rail pressure was 4650 when running during the last scan.any ideas would be greatly appreciated as it is cold here and this is my main transpo as well as my work van.thanks,jb.p.s.it started right up with a very small squirt of ether in the intake box,yea i know,but i had to resort to it for the first time this morning at 15f and its only going to get colder the next couple of days.