Hey guys,
I have a 2004 6.0 that was running fine and starting fine until the other day it wont start cold. Truck turns over but no start. I noticed today though that there is no injector buzz. If I give it a quick shot of starting fluid it will fire right up and restart all day, until it sits for a while (overnight). There is alot of white smoke that smells like fuel while cranking but none once i spray the fluid and fires right up.

The ficm is an upgraded unit from ed and has 1500 miles on it and has 48v fmp while cranking.
my ipr % is roughly 60% while cranking
icp shoots right up 1800 psi (new sensor I replaced since I had the intake off along with cleaning ipr valve that looked good)

Any ideas on why the non start or where I should start with the troubleshooting?

thanks,
thebluemule

 

Recent oil change?

Josh

 

Have you ever had I injector buzz KOEO? Some early trucks didn't without a reflash.
The 03-04 trucks are hard to get to set a glow plug code.
Do you have access to a scanner? The snap on and maybe others have a functional test for the glow plug system. If not you can test on the engine.
The fact it will start fine unless its cold makes me wonder if that's not the problem.


You try the block heater?

 

I changed the oil about 2k ago. Then I had a major oil leak that dropped most of my oil. So I drained the remainder of oil and filled with new oil after I fixed the leak, but left old filter as it only had 2k on it.

 

I have had it plugged in for 2 days and still no start. I used to be able to hear the injectors buzzing while I would wait for the glow plugs to cycle but now there is no sound or buzzing. I do not have a scanner just a code reader and theonly thing I have is p0197 (eot low). Which I dont believe has any relation to the problem from my research.

 

Lack of injector buzz at all times or just cold? I would suspect the FICM relay.

As for cold start, possible weak HPOP shaft seal that's bleeding oil while it sits. Park nose up to confirm.

Josh

 

It hasnt had a cold start issue until I noticed no injector buzz. I havent got to see yet if they buzz with the truck warm but will check it out asap

 

I should expound the parking nose up/ nose down theory:

The early HPOP can develop a weak shaft seal causing the oil in the reservoir to bleed down.

Park nose up and it will drain faster, causing a longer cold start. Park nose down contains the oil and should result in a normal start.

Josh

 

If it used to buzz then that's your problem. I agree about the relay.

 

Do the injectors "buzz" when warm? What is the injector buzzing even mean or what is the purpose?
I will have to wait until the morning to get / test the relay

 

Now this is the second post like this in 2 days the other is at the org.
Nothing I suggested seemed to work. I don't think I can help here either. Sorry

 

Thanks for the help and suggestions. I'm taking anything anyone has to offer. I'm New to the 6.0s and live in the sticks where the internet still sucks. So between working all day and living in the boonies only get to do a little research on my phone when I go to town. Sorry if Im annoying anyone by similar posts. Just trying to get my truck fixed before the next snow flys

Thebluemule

 

Need to know what eot the pcm is seeing. That will influence glow plug cycle time and other things. I doubt a hpo problem being the icp jumps right up and the ipr is not maxing out. Take a koeo reading of the coolant Trans and oil temp without it being plugged in for 12 hrs. Then watch the battery voltage right after turning on the key and see if it drops under 12v, meaning the glow plugs are drawing a considerable amount of current and note how long they stay on (watch the battery voltage to bounce back up) and ambiant temp.

 

No problem about the post I am wondering if this is going to be a new developing issue that we haven't seen before. Because this exact issue is new to me at least.

 

I just saw something similar happen. Only one injector would buzz and it turned out to be sticking shuttle valves on the injectors. Truck would start but run rough until warmed up.