First off I'm new here and would like to say hi. I've read about my issues here and some other forums and decided to join here as there seems to be many knowledgeable members. I have a 2001 f350 420000km. The truck is fairly new to me and will not start in the cold. Starts right up when plugged in, the odd time it idles rough for 20 seconds or so then smooths right out, it will generally start fine the rest of the day.
So first off I will tell you the things I have checked, batteries load tested fine, even swapped the batteries to be sure, terminals and leads are all clean, glow plug relay looks like it has been replaced at some point and this one tests out ok, glow plugs ohmed at .6-1.4 depending on the plug, 12volts at the power side of the harness, HPOP oil level was good, WTS light comes on, tried crossing the terminals on the GPR for 45 seconds or more still nothing, get puffs of white smoke when trying to start so getting fuel, fuel bowl is full, changed fuel filter, starter appears to be very new, as well as the fuel pump on the frame rail, the tach does move just a little when it tries to start. The only thing I haven't changed was the oil but will be doing that tomorrow and though I'm sure it could be the problem I find it unlikely as it doesn't seem overly thick but who knows.
I guess I'm just asking for a little guidance as what to check next. I do have a couple of questions:
On the GPR I get 12.2volts on the hot side and 10.8 on the other side when the key turns on and it stays on for a while, when I check the hot side it also drops to the same is this normal?
Is it possible the glow plugs have hydro and ohm out correctly but are not getting hot? I was debating popping the valve covers and removing them and checking to see if that was the case. I was just trying to avoid that if its not possible.
Anyways I'm sure this subject has been beat to death and I've searched and searched for answers on the questions I've asked and remedies to this situation but I'm at a loss and hoping someone can steer me in some kind of direction on where to go from here.
On a side note the truck is not kicking any codes and the previous owner replaced one injector though I can't remember which
Thanks in advance
The Glow Plugs are drawing over 150A, yes, the voltage is supposed to drop in the whole system, 10.8v is actually better than most (might mean they're not all working too...) If you have OHMed Out the GPs, and the results seem to be right, there wouldn't be anything that could give a false reading that I'm aware of. You've seen this? -> Troubleshooting GPR & GP's
For the best Cold Start results (say under 35F) here's what I would follow;
Forget the WTS light, it's not in any way connected to the GP system.
Over 20F, wait a Full min, with the key On, before you crank.
Under 20F, plug the block heater in for 3hrs (get a timer so it comes on before you leave in the morning) and wait 1-1/2 to 2 mins before you crank.
If you're routinely under 20, and especially if it's in the single digits, you will see a big improvement if you use a 5W-40 Synthetic motor oil (that 15W is pretty thick in those temps)
You have pretty high mileage, and depending on it's maintenance, there's a possibility you can be suffering with low compression. Cold starts are Really dependent on the compression being what it should be to ignite the charge and might be the first signs for you...
Try the easy stuff first, if everything else is right, you might want to have the compression taken (it's done through the GP holes so you'd get a look at 'em
Edit; are you sure the block heater is working? Feel the block. above the oil filter, where the cord goes in to be sure