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Hey Guys, New to the forum, I usually just troll around. I have a 2015 EcoD with 22,xxx miles on it. This past weekend I went out to Yuma, AZ where it was 100-108 degrees outside. After unloading the truck and boat and everything at the house I got back in the truck and tried to start it, it cranked for probably 8-10 seconds before it finally started up, I noticed when it was cranking a low oil pressure message appeared on the screen but as soon as it started that was gone. Throughout the course of the weekend I moved the truck a bunch of times all with the same result, one of the times it cranked for what seemed like 20 seconds and you could hear the motor almost fire up but it just wouldnt do it, again the low oil pressure message popped up on screen but as soon as it started it was gone. I also noticed on the drive home the oil got really hot, higher than I have ever seen it. Now that I'm back in San Diego in 70-80 degree weather the truck is still doing it, sometimes its just 3-5 extra seconds, sometimes longer.

I don't think this is battery related because it still cranks at the same speed it did when it was brand new, it just cranks for a while before it turns over. I haven't had any issues with the truck besides this, the service electronic throttle message has popped up 3-4 times but it immediately turns back off with no issues, other than that its been to the dealership a few times for some oil changes but nothing else. Kinda stumped. The dealership is going to take a look, I called today and they cant look at it until the 18th...
 

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Has the fuel filter been changed yet? Could be the fuel, maybe a big change in fuel quality. Hard to determine by mileage as your towing.
The low oil pressure could just be a side effect of the engine taking so long to crank over.
Check the battery voltage while the truck is off and while cranking, it should stay above 12V. ground your meter to something other than the negative battery terminal.
 

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Welcome to the forum.

This is going to be a hard one to determine right off the bat. The oil pressure will be low until the truck is started. The thing is, the long cranking. Did you purchase fuel anywhere different? Did it happen after you purchase fuel? The only other thing I can think of, High Pressure Fuel Pump. If you don't take it in now, and it is still doing it, especially after a fresh tank of fuel, and possibly a filter change, I would have it taken in.
 

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Could be the glow plugs failing.
doubt the glow plugs are going bad, if it was happening on the first start of the day then it would be a possibility.
If you tip-start the engine and it cranks immediately, the ECM is not turning the glow plugs and waiting for them to warm up.
 

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Has the fuel filter been changed yet? Could be the fuel, maybe a big change in fuel quality. Hard to determine by mileage as your towing.
The low oil pressure could just be a side effect of the engine taking so long to crank over.
Check the battery voltage while the truck is off and while cranking, it should stay above 12V. ground your meter to something other than the negative battery terminal.
I have never seen a 12v battery stay at 12 volts or above when cranking unless it was an 8D starting a lawn mower. While I didn't check my truck, I would expect it to drop well below 12 and probably below 11 volts but it is a relatively small engine and a good sized battery. Seems to me it was about 10 volts with a 5 liter V* gas engine. Surely there is a good Ram technician here that knows the correct number, but I feel certain it isn't 12 volts or above.

All the best,
 

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I have never seen a 12v battery stay at 12 volts or above when cranking unless it was an 8D starting a lawn mower. While I didn't check my truck, I would expect it to drop well below 12 and probably below 11 volts but it is a relatively small engine and a good sized battery. Seems to me it was about 10 volts with a 5 liter V* gas engine. Surely there is a good Ram technician here that knows the correct number, but I feel certain it isn't 12 volts or above.

All the best,
On our locomotives, our 68 volts of batteries (give or take a few volts) drops down in the low 50's on cranking. When I restart after initializing a mobile regen on my edge, my edge alerts me that I go below 11 volts. A load test on the battery is probably a better alternative.
 

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Check coolant bottle for oil, check standing (key off) voltage of battery is considered good around (12.7v-13v) at rest!
Listen for abnormal noise or a tapping high pitch sound at passenger side engine bay.
Start truck bring to operating temp (10mile drive) place truck in gear "D" foot on brake allow engine to idle look for and observe any spikes in rpm and oil pressure, should remain smooth and steady.

Rpms should be around a constant 750 rpm, and oil pressure should remain consistently 18psi while in these conditions if either spikes or fluctuates up or down within a 4-5 second range get it checked asap!
Oil should remain at 18 psi without a loss and gain cycle happening.
Check inside of oil cap for a milky sludge that would indicate a coolant leak into engine (head gasket failure)
Also check under truck ( quick peek under engine, and fuel tank) for diesel fuel leaks.

Good luck!
 

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I would expect it to drop well below 12 and probably below 11 volts but it is a relatively small engine and a good sized battery. Seems to me it was about 10 volts with a 5 liter V* gas engine.
Yeap..typed that too fast, thanks for the catch. With the truck having an AGM battery, if the voltage drops more than about 2 volts to suspect the battery might be going bad.
 

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Discussion Starter #13
Wow! So much good information in here.

Yesterday I took a look around on the truck, I didn't get a chance to check the battery but that will be my next step. One thing I did notice is the coolant dropped below the cold fill line, even when its hot its down below there which is interesting because I had the truck serviced about 2,000 miles ago and my dealer is really good about topping off fluids etc. The oil level also seems high, I checked multiple times and all of them were above the max line. I haven't noticed white smoke or anything like that, just the persistent starting issue. I also do notice a loud tapping sound on the passenger side of the truck when the hood is up and I noticed today that it seems a bit oily in the wheel well, that could be armor all since I just had a detail but all the other wheel wells are dry.
 

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Wow! So much good information in here.

Yesterday I took a look around on the truck, I didn't get a chance to check the battery but that will be my next step. One thing I did notice is the coolant dropped below the cold fill line, even when its hot its down below there which is interesting because I had the truck serviced about 2,000 miles ago and my dealer is really good about topping off fluids etc. The oil level also seems high, I checked multiple times and all of them were above the max line. I haven't noticed white smoke or anything like that, just the persistent starting issue. I also do notice a loud tapping sound on the passenger side of the truck when the hood is up and I noticed today that it seems a bit oily in the wheel well, that could be armor all since I just had a detail but all the other wheel wells are dry.
If your coolant level is low, and your oil level is high - you may have cross contamination although from my knowledge with the ED it usually happens in reverse (oil drops, coolant raises)

Coolant in the bottle should still be clear purple, yeah? No black spots or extreme darkness?

Make sure you're checking your oil properly (bring engine up to temp, let cool for 10-13min, then double-dip to check) though as a cold check will yield false results.
 

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When is the last time the fuel filter was changed? Could be taking a while to reach an acceptable fuel pressure to fire.
 

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Discussion Starter #16
Check coolant bottle for oil, check standing (key off) voltage of battery is considered good around (12.7v-13v) at rest!
Listen for abnormal noise or a tapping high pitch sound at passenger side engine bay.
Start truck bring to operating temp (10mile drive) place truck in gear "D" foot on brake allow engine to idle look for and observe any spikes in rpm and oil pressure, should remain smooth and steady.

Rpms should be around a constant 750 rpm, and oil pressure should remain consistently 18psi while in these conditions if either spikes or fluctuates up or down within a 4-5 second range get it checked asap!
Oil should remain at 18 psi without a loss and gain cycle happening.
Check inside of oil cap for a milky sludge that would indicate a coolant leak into engine (head gasket failure)
Also check under truck ( quick peek under engine, and fuel tank) for diesel fuel leaks.

Good luck!
The coolant bottle seems clear of any oil, looks to me like its just clear and purple. I tried what you suggested and I noticed that while sitting at idle the rpms's are jumping around a bit, not a ton but its consistently moving up to 750 and down a bit, not all the way to 500. I also noticed that the oil pressure will fluctuate between 17 and 18psi but it will mostly stick at 17psi. When I get a chance Ill check both the oil cap and under the truck.

The fuel filter has not been changed yet, and I always fill up at the same chevron by my house, very high volume station, constantly packed. If I go on a trip to yuma (every two weeks or so) I fill up at the chevron out there, same situation, very high volume station, I think those are the only two places I've ever filled up at.

What temps should I be seeing for oil and coolant? When towing home last weekend I was noticing oil temps up near 290, I also noticed the difference in coolant temp vs. oil temp was greater than 20 degrees difference which my 7.3 powerstroke friends say is bad news. And what PSI? I hadn't paid too much attention in the past but I'm noticing PSI is up in the 50's at times.
 

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Everyone is speculating on mechanical issues and that could be. The 18th cannot come soon enough. I often have other ideas.

What is "long cranking" to you?

These trucks have what we call "tip start". That means you turn the key or press the button or whatever and let go right then and there. The truck then goes into a cycle to activate the starter and keep it going until start time. After you "tip" the key or button, leave it alone and time then. Now first you really should allow the system to go through it's warm-up beeps - think there are five. Then "tip" the starter and let go. From the start of the first beep until their end and engine start is probably a good 10 to 15 seconds.

Some do get in, turn and hold the key on and expect start to be immediate. Maybe it is but not so for me. Wait the five beeps and "tip".
 

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There was a flash tsb available that raised rpm just a little bit, you might need this update!
However oil pressure should be 19 psi steady and smooth idle at 750 rpm.

Bring truck in to dealer for an update? Obtain an oil sample and have it analyzed for your piece of mind, and for a bench mark to compare to if things get worse.

Good luck
 

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Oil temps 'up near 290 degrees' strikes me as extremely high and above anything I have ever seen reported onthis website before. If this is not a typo I believe you have a problem. GDE and others have pointed out that the engine's computer control module is supposed to depower the engine and prevent damage to it. I suggest you search the GDE threads for info but if the 290 degree oil temperature is really correct I believe something is wrong. Please describe the conditions that caused the oil to reach that temperature.
 

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Discussion Starter #20
Everyone is speculating on mechanical issues and that could be. The 18th cannot come soon enough. I often have other ideas.

What is "long cranking" to you?

These trucks have what we call "tip start". That means you turn the key or press the button or whatever and let go right then and there. The truck then goes into a cycle to activate the starter and keep it going until start time. After you "tip" the key or button, leave it alone and time then. Now first you really should allow the system to go through it's warm-up beeps - think there are five. Then "tip" the starter and let go. From the start of the first beep until their end and engine start is probably a good 10 to 15 seconds.

Some do get in, turn and hold the key on and expect start to be immediate. Maybe it is but not so for me. Wait the five beeps and "tip".
I'm only counting the time it is taking once you hear the starter get going. So after I tip the key once everything gets going and you hear the starter come on, usually it took just a second or two, now it is noticeably long, sometimes you hear the starter running for up to about 20 seconds before it starts up. Even today I was getting in and my coworker got out of his car to come help me because he heard it cranking for so long.
 
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