Rough Cold Start
Cargo Master
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
That voltage drop is much better.
Your static voltage is still a little low, might be enough to slow the starter down enough to cause those initial romps.
I'm sure some 5w40 when the climate calls for it will smooth it the rest of the way out.
Congrats!
Your static voltage is still a little low, might be enough to slow the starter down enough to cause those initial romps.
I'm sure some 5w40 when the climate calls for it will smooth it the rest of the way out.
Congrats!
Fleet Mechanic
Joined: Nov 2010
Posts: 1,408
Likes: 249
From: Ringgold, Ga
Brady not sure if it was mentioned before in the thread.
That wait to start only lights off for 15 seconds. Good practice on super cold start to wait 2 mins total.
Watch the clock or listen for the GPR to go off. Also watch your voltage jumps right back to 12+ when GPR turns off.
Waiting the extra 2 mins gives the starter full batt voltage also to do it's job better.
Glad you have it going your way.
That wait to start only lights off for 15 seconds. Good practice on super cold start to wait 2 mins total.
Watch the clock or listen for the GPR to go off. Also watch your voltage jumps right back to 12+ when GPR turns off.
Waiting the extra 2 mins gives the starter full batt voltage also to do it's job better.
Glad you have it going your way.
Cargo Master
Joined: Aug 2003
Posts: 2,332
Likes: 442
From: Eastern Washington
I usually figure 3 trips. Less now as I get older and have a bigger pile of crap to rummage thru....
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Mountain Pass
Joined: Apr 2021
Posts: 130
Likes: 19
From: Idaho
Brady not sure if it was mentioned before in the thread.
That wait to start only lights off for 15 seconds. Good practice on super cold start to wait 2 mins total.
Watch the clock or listen for the GPR to go off. Also watch your voltage jumps right back to 12+ when GPR turns off.
Waiting the extra 2 mins gives the starter full batt voltage also to do it's job better.
Glad you have it going your way.
That wait to start only lights off for 15 seconds. Good practice on super cold start to wait 2 mins total.
Watch the clock or listen for the GPR to go off. Also watch your voltage jumps right back to 12+ when GPR turns off.
Waiting the extra 2 mins gives the starter full batt voltage also to do it's job better.
Glad you have it going your way.
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CNCFAB
Joined: Apr 2020
Posts: 4,874
Likes: 2,006
This was yesterday. It was like -10 to -14 out when I started it. It had been -21. Not plugged in all night. I had to shut it back down and add some diesel 911 as fuel gelled and I lost much if my fuel pressure
this is with new injectors, glow plugs and relay, and newer batteries. Dont know if the comparison helps you
this is with new injectors, glow plugs and relay, and newer batteries. Dont know if the comparison helps you
Got Data?
Joined: Dec 2012
Posts: 4,260
Likes: 1,390
From: Lake Stevens, WA
... I've had better luck with trying to start it while the glow plugs are on rather than with the extra voltage of them being off. My assumption is that when they are off the cold air being sucked in while trying to start the engine is cooling the cylinder back down rapidly.
Excerpt from the owners manual on cold start procedure.
Those of you that have better luck with long GP cycles - I'm curious why that is. Certainly keep doing that if it works for you, I just do not understand why it would help.
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Mountain Pass
Joined: Apr 2021
Posts: 130
Likes: 19
From: Idaho
I agree with you - sounds reasonable to me. You want the glow plugs on during cranking. No need to cycle glow plugs 2 minutes in cold weather. That glow plug tip is not adding much heat to the cylinder walls, and like you said, that hot air around the glow plug is gone in one revolution of the crank, and cold air is rushing in. It's the tip that is doing the work of igniting the atomized fuel - just need a few seconds to get it hot enough to do that, and the WTS light tells us when that is.
Excerpt from the owners manual on cold start procedure.
Those of you that have better luck with long GP cycles - I'm curious why that is. Certainly keep doing that if it works for you, I just do not understand why it would help.
Excerpt from the owners manual on cold start procedure.
Those of you that have better luck with long GP cycles - I'm curious why that is. Certainly keep doing that if it works for you, I just do not understand why it would help.
Were you applying throttle during that start or starting in a high idle tune? Mine doesn't Rev that high to start.