Join Date: Sep 2010
Feedback Score: 0 reviews
Have you tried taking the fuel filter cover off and having someone turn the key on and watching the fuel flow?
I am sceptical that you are losing "fuel prime", but I am leaning more towards a high pressure oil system leak.
Let me explain my theory:
The high pressure oil system is fed by the low pressure oil system.
The low pressure system fills a "reservoir" that is located on top and in the front of the engine, under the oil filter housing (more or less). The reservoir drains down through a screen and into a channel, that channel feeds the High Pressure Oil Pump (HPOP).
If you park with the nose up, this reservoir could drain back into the oil pan if there is a high pressure oil leak.
Heres the only way I can think of to check this out;
Park the truck nose up, check the oil level on the dipstick. It will not be an accurate measure of what the true level is in the truck, but for this it really does not matter. You just need a "starting point." Mark the level on the dipstick any way you can think of. A dab of red lipstick might work for this, I don't know.
The next morning (or at least the 10 hours later you describe), before cranking the engine, recheck your oil level. Has it gone up?? Even slightly? This would tell you if the oil is draining back from the High Pressure Oil system, but will NOT tell you where the actual leak is.
Also, if you see higher oil level, What it is really telling you is that it is time to get the high pressure oil system checked by a qualified tech.