Ford Focus 1.8 tdci 03 it's had new glow plugs fuel rail sensor still doesn't start unless I squirt cold start down air intake.... What else can I change? Help

Hi,
Here is the location of the "Knock Sensor" you requested, I hope it helps you. It is Number 17. for future reference here is the list of the others
1 = Camshaft position sensor (CMP)
2 = Crankshaft position sensor (CKP)
3 = Engine Control relay (EC) -engine bay fusebox/relay plate 1
4 = Engine Coolant temperature sensor (ECT)
5 = Exhaust gas recirculation valve actuator (EGR)
6 = Fuel Filter
7 = Fuel Filter Heater - in fuel filter housing
8 = Fuel Flow control valve - on high pressure fuel pump
9 = Fuel Rail pressure sensor(FRP)
10 = Fuel Temperature sensor - on high pressure fuel pump
11 = Glow Plugs
12 = Glow Plug Relay 1 - engine bay fuse box/relay plate 2
13 = Glow Plug relay 2 - engine bay fuse box/relay plate 2
14 = High Pressure fuel pump
15 = Injectors
16 = Intake air temperature sensor (IAT) - in MAF sensor
17 = Knock Sensor (KS)
18 = Mass Air Flow sensor (MAF)

Diesel fuel tends to be sluggish to pump in cold weather and that is why some diesel cars and trucks have heaters in the fuel tank to overcome this problem. However I tend to think that the glo-plugs are not working as they should be. Have them tested . The fuel pressure fault may be the inability of the pump to pump enough fuel to do the job.

I suggest you check that the glow plugs are working as a cold diesel needs the glow plugs to initially ignite the fuel spray in the combustion chambers

pressure regulator on feul rail

white sort of smoke when cold and trying to start ,well dont panic and pull engine apart i think you just need new glow plugs thats all ,when its really cold just spray a squirt of easy start ether spray into the air intake whilst someone cranks engine and if it starts straight away then you know you need new glow plugs or the timer relay isnt working ,their is nothing wrong with the engine its just the fact that the glow plugs are down to one out of the four working if not all of them are dead and what you seeing is unburnt fuel as vapour .This is normal what you are seeing if the heater glow plugs are not working as after 40yrs i have seen this quite a lot especially with ricardo type cylinder heads (indirect injection) but you do get it with direct injection as well if the compression is down or the fuel has gelled up but you need temperatures of at least 10c below for this to happen unless the fuel has a antifreeze additive or half a gallon petrol to a tank of diesel will do the same antifreeze trick.

Dirty connection on plug to fuel rail pressure sensor

only takes one glow plug out of order to cause problems . check them for proper volatge and resistance

right renew the glow plug timer/relay if you put a meter on the glow plugs when cold and turn ign on (with help) it should supply power for a about 20 secs ,time depends on outside air temperature ,if all else fails then do a colin --- use a push button switch,wired to a relay so glow plugs can be operated by pushing the switch which you will mount on the dash ,cant beat a manual overide system

needs new glow plugs not hard to do

factory immobiliser playing up ,get a new ECU unit with the chip out of the key and the key reader