Galloping Idle on Start
#1
Galloping Idle on Start
My 7.3 has had a habit for some time of a galloping idle for 3-8 seconds when started after it has been sitting for a while (i.e. weeks). If it's been run recently, it starts right up to a smooth idle.
However, last week the problem took a turn for the worse. In deer camp, after sitting unused for only three days, it started with the galloping idle, then quit, which it hasn't done before. It did it again 4 or 5 times before starting and idling smoothly. Naturally I'm worried that it will get worse to the point that the idling smoothly part will never come about.
As best I can describe it, the engine cranks normally, fires off at the normal time, then the RPM varies from about 600-900 in a "rrrRrRrRRRMMMsilencerrrRrRrRRRMMMsilencerrrRrRrRRRMMMsilence" pattern.
I've tried to record a video of it, but it naturally hasn't done it since.
When doing the galloping idle it doesn't respond to any throttle input. Note also that the truck would do this before I installed the Hydra with PHP tunes.
Thoughts?
Oh, and because posts are more fun with pictures, and because it's on topic because the problem happened while deer hunting.....
My son with our bucks:
On our way home:
However, last week the problem took a turn for the worse. In deer camp, after sitting unused for only three days, it started with the galloping idle, then quit, which it hasn't done before. It did it again 4 or 5 times before starting and idling smoothly. Naturally I'm worried that it will get worse to the point that the idling smoothly part will never come about.
As best I can describe it, the engine cranks normally, fires off at the normal time, then the RPM varies from about 600-900 in a "rrrRrRrRRRMMMsilencerrrRrRrRRRMMMsilencerrrRrRrRRRMMMsilence" pattern.
I've tried to record a video of it, but it naturally hasn't done it since.
When doing the galloping idle it doesn't respond to any throttle input. Note also that the truck would do this before I installed the Hydra with PHP tunes.
Thoughts?
Oh, and because posts are more fun with pictures, and because it's on topic because the problem happened while deer hunting.....
My son with our bucks:
On our way home:
#2
#3
#4
The injectors are OEM but the truck has only 73,000 miles.
The dino isn't old as the truck recently did 2,000 miles to Yellowstone and back, and on driving to the ranch had been refueled in Ellensburg on Friday before the hard starting Monday morning.
The GPR is only a few weeks old per this thread, and that fixed the hard-to-start-at-all problem.
I didn't try switching to 00 on the Hydra, but the problem existed pre-Hydra. It's just that this is the first time the galloping idle problem has worsened to a quit-running rather than keep-running-and-smooth-out-to-normal event.
Another problem is that it's not very repeatable - it hasn't done it since, and probably won't again until that truck has been sitting at least a week without being run.
There's no CEL, but I don't have a way to read codes.
The dino isn't old as the truck recently did 2,000 miles to Yellowstone and back, and on driving to the ranch had been refueled in Ellensburg on Friday before the hard starting Monday morning.
The GPR is only a few weeks old per this thread, and that fixed the hard-to-start-at-all problem.
I didn't try switching to 00 on the Hydra, but the problem existed pre-Hydra. It's just that this is the first time the galloping idle problem has worsened to a quit-running rather than keep-running-and-smooth-out-to-normal event.
Another problem is that it's not very repeatable - it hasn't done it since, and probably won't again until that truck has been sitting at least a week without being run.
There's no CEL, but I don't have a way to read codes.
#7
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#13
Yes, my truck sounds exactly like the truck in the video.
So, I guess it has the romps. (Sounds like something you could pick up in the PI.)
That sent me scurrying to the search function to find the cure for the romps and it doesn't appear to me, at least in the threads I found, that the hive mind has yet found a definitive cause/cure for the problem.
For many, switching to thinner oil stops the romps, but it doesn't for others, and consensus seems to be that it's only a band-aid fix for the root problem. Some are of the opinion that it's actually a software problem.
Or....I never found the right thread that announced the miracle cure.
I've run Delo 15-40 year round since the truck was new because it normally doesn't get that cold around here (sub 30 nights are rare in the winter) and I only occasionally get up in the mountains.
Tugly: I don't normally happen by Wenatchee, but if I do I might pester you.
So, I guess it has the romps. (Sounds like something you could pick up in the PI.)
That sent me scurrying to the search function to find the cure for the romps and it doesn't appear to me, at least in the threads I found, that the hive mind has yet found a definitive cause/cure for the problem.
For many, switching to thinner oil stops the romps, but it doesn't for others, and consensus seems to be that it's only a band-aid fix for the root problem. Some are of the opinion that it's actually a software problem.
Or....I never found the right thread that announced the miracle cure.
I've run Delo 15-40 year round since the truck was new because it normally doesn't get that cold around here (sub 30 nights are rare in the winter) and I only occasionally get up in the mountains.
Tugly: I don't normally happen by Wenatchee, but if I do I might pester you.
#14
Yes, my truck sounds exactly like the truck in the video.
So, I guess it has the romps. (Sounds like something you could pick up in the PI.)
That sent me scurrying to the search function to find the cure for the romps and it doesn't appear to me, at least in the threads I found, that the hive mind has yet found a definitive cause/cure for the problem.
For many, switching to thinner oil stops the romps, but it doesn't for others, and consensus seems to be that it's only a band-aid fix for the root problem. Some are of the opinion that it's actually a software problem.
Or....I never found the right thread that announced the miracle cure.
I've run Delo 15-40 year round since the truck was new because it normally doesn't get that cold around here (sub 30 nights are rare in the winter) and I only occasionally get up in the mountains.
Tugly: I don't normally happen by Wenatchee, but if I do I might pester you.
So, I guess it has the romps. (Sounds like something you could pick up in the PI.)
That sent me scurrying to the search function to find the cure for the romps and it doesn't appear to me, at least in the threads I found, that the hive mind has yet found a definitive cause/cure for the problem.
For many, switching to thinner oil stops the romps, but it doesn't for others, and consensus seems to be that it's only a band-aid fix for the root problem. Some are of the opinion that it's actually a software problem.
Or....I never found the right thread that announced the miracle cure.
I've run Delo 15-40 year round since the truck was new because it normally doesn't get that cold around here (sub 30 nights are rare in the winter) and I only occasionally get up in the mountains.
Tugly: I don't normally happen by Wenatchee, but if I do I might pester you.
#15
New glow plugs solved the problem. No romps since....not during the winter nor when at high altitude.