Quick bog at start up
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Quick bog at start up
In the cold, i would go out and let the truck go through one glow plug cycle, when i go to start the truck it fires right up but about 10 seconds into idle after it was started it almost sounds like the truck bogs down or wants to die but catches it self and goes back to normal? Is this an issue or is my head playing games with me? Lol mom and dad dont cover my repairs so any issue i hear or see throws a flag with me, any help would be appreciated!
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Thats what i thought it was, havent tried it in the warm yet! Appreciate the input!!
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Are you talking like 5-10 seconds after the truck is started? Sounds like it was gunna stall but kinda revs itself up once? Because thats exactly what im talking about
Laughing Gas
Joined: Oct 2013
Posts: 861
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From: AZ
No where near a stall but it bounces probly 100rpm when my glow plugs kick off. I have a GPR LED installed so I can see exactly when it happens. Or you can keep a close eye on voltage to see if it coincides with the stumble.
You know the glow plug light on the dash has nothing to do with how long the glow plugs are energized right?
Either way you're describing something a little more drastic than what I'm talking about unless a set of low batteries were thrown in the mix putting even more strain on the alternator.
And someone mentioned EBPV but when mines operates it just makes a hissing noise until it opens back up, doesn't effect the engine smoothness or rpm at all.
You know the glow plug light on the dash has nothing to do with how long the glow plugs are energized right?
Either way you're describing something a little more drastic than what I'm talking about unless a set of low batteries were thrown in the mix putting even more strain on the alternator.
And someone mentioned EBPV but when mines operates it just makes a hissing noise until it opens back up, doesn't effect the engine smoothness or rpm at all.
Junior User
Joined: Oct 2015
Posts: 86
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From: CA
When the Glow Plugs are active (below 140*F EOT) the Alternator, Rectifiers, and Regulator are fully closed trying to achieve its maximum output.
This places a strain on the engine as the alternator shaft is "dragging" in its magnetic field thus slowing the engine speed. The PCM compensates by adding fuel to maintain 650-750 RPM.
This will continue to occur until the Glow Plugs circuit gets an open command from the PCM. And, the engine will begin to increase in RPM until the PCM signals the IPR to open slightly to achieve 650-750 RPM (or thereabouts).
Now, all the gibberish aside.
You should check your charging system to ensure the Batteries and Alternator are functioning normally. Since I can't either see nor hear the process I can't say as though it is normal or not.
The entire electrical systems on the HEUI engines are very tasked during first start of the day when cold.
This places a strain on the engine as the alternator shaft is "dragging" in its magnetic field thus slowing the engine speed. The PCM compensates by adding fuel to maintain 650-750 RPM.
This will continue to occur until the Glow Plugs circuit gets an open command from the PCM. And, the engine will begin to increase in RPM until the PCM signals the IPR to open slightly to achieve 650-750 RPM (or thereabouts).
Now, all the gibberish aside.
You should check your charging system to ensure the Batteries and Alternator are functioning normally. Since I can't either see nor hear the process I can't say as though it is normal or not.
The entire electrical systems on the HEUI engines are very tasked during first start of the day when cold.
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No where near a stall but it bounces probly 100rpm when my glow plugs kick off. I have a GPR LED installed so I can see exactly when it happens. Or you can keep a close eye on voltage to see if it coincides with the stumble.
You know the glow plug light on the dash has nothing to do with how long the glow plugs are energized right?
Either way you're describing something a little more drastic than what I'm talking about unless a set of low batteries were thrown in the mix putting even more strain on the alternator.
And someone mentioned EBPV but when mines operates it just makes a hissing noise until it opens back up, doesn't effect the engine smoothness or rpm at all.
You know the glow plug light on the dash has nothing to do with how long the glow plugs are energized right?
Either way you're describing something a little more drastic than what I'm talking about unless a set of low batteries were thrown in the mix putting even more strain on the alternator.
And someone mentioned EBPV but when mines operates it just makes a hissing noise until it opens back up, doesn't effect the engine smoothness or rpm at all.
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When the Glow Plugs are active (below 140*F EOT) the Alternator, Rectifiers, and Regulator are fully closed trying to achieve its maximum output.
This places a strain on the engine as the alternator shaft is "dragging" in its magnetic field thus slowing the engine speed. The PCM compensates by adding fuel to maintain 650-750 RPM.
This will continue to occur until the Glow Plugs circuit gets an open command from the PCM. And, the engine will begin to increase in RPM until the PCM signals the IPR to open slightly to achieve 650-750 RPM (or thereabouts).
Now, all the gibberish aside.
You should check your charging system to ensure the Batteries and Alternator are functioning normally. Since I can't either see nor hear the process I can't say as though it is normal or not.
The entire electrical systems on the HEUI engines are very tasked during first start of the day when cold.
This places a strain on the engine as the alternator shaft is "dragging" in its magnetic field thus slowing the engine speed. The PCM compensates by adding fuel to maintain 650-750 RPM.
This will continue to occur until the Glow Plugs circuit gets an open command from the PCM. And, the engine will begin to increase in RPM until the PCM signals the IPR to open slightly to achieve 650-750 RPM (or thereabouts).
Now, all the gibberish aside.
You should check your charging system to ensure the Batteries and Alternator are functioning normally. Since I can't either see nor hear the process I can't say as though it is normal or not.
The entire electrical systems on the HEUI engines are very tasked during first start of the day when cold.
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