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More info please...
1. Is there a particular temperature that we are talking about or does it happen every time?
2. Where is the oil level on the dipstick? (fill to full + maximum of 2qts over to diagnose oil airation due to oil pickup issues)
3. Do you have access to and AutoEnginuity or equivalent scan tool? (need a way to monitor the Injector control pressure, need to be making steady 500 psi during cranking. Also need to monitor IPR duty cycle.)
4. Does your truck have any visible oil leaks (even small ones) on the oil cooler? Elsewhere on the engine? Leaking oil cooler o-rings can alow enough air to get into the oil during cranking to really make things hard to start.
5. What is your fuel fill level on the gauge?
6. Do you hear the fuel pump run during the wait to start cycle?
7. Manual or Auto? Not sure about autos, but for manuals the parking brake must be set (dash light illuminated) to allow intake heater to function.
8. Does the truck sound like it is cranking evenly?
Other tips: Just because the "wait to start" light goes off doesn't mean it is ready to start when things are cold. The glow plugs will remain on for up to 90 seconds during cold weather conditions. The first start attempt is the best chance, wait the 90 seconds with the key on, then cycle ignition and crank after the wait to start light goes out. After the first attempt any unburned fuel/oil/exhaust can increase the amount of energy required or otherwise inhibit the start of the combustion in any given cylinder. Also if your oil becomes airiated in the first attempt the truck will not start until the air bubbles are allowed to settle out.
Last edited by Jon_001; 02-17-2014 at 06:41 PM.