Lopey Idle
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Senior User
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Lopey Idle
So the other day I was at a gas station parked next to a second gen 7.3 powerstroke. It had the nicest idle I have ever heard. It had a very lopey/choppy sound. It made me wonder though. What would make it sound like this? What physically is going on to make it idle that way?
Fleet Owner
Joined: Jul 2006
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From: Mi'kma'ki
sounds like it's cammed.i didn't know or think you could cam a diesel.(meaning replacing the camsaft with an aftermarket one with lobe separation that causes this.like 106/107/108 for example.)
maybe they can adjust this stuff with computer chips etc.interesting.
edit.
ok searching for camsaft with lopey idle for 7.3l led to "resister mods"
so seems they are adding a resister someplace to control their computers.......sweeeeeeet!
here ya go.did it sound like this one?
http://www.youtube.com/watch?v=Wu8ISiq8PYE&NR=1
sounds just like you replaced the cam in the diesel.that's a bad *** mod!
maybe they can adjust this stuff with computer chips etc.interesting.
edit.
ok searching for camsaft with lopey idle for 7.3l led to "resister mods"
so seems they are adding a resister someplace to control their computers.......sweeeeeeet!
here ya go.did it sound like this one?
http://www.youtube.com/watch?v=Wu8ISiq8PYE&NR=1
sounds just like you replaced the cam in the diesel.that's a bad *** mod!
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No I dont believe that was it. I read about it on a powerstroke forum a little bit. It has to do with some type of electronic thing that controls the injectors or something like that. It was kinda confusing to read but it still didnt answer my question as to what would physically make it idle that way.
Post Fiend
Joined: Oct 2007
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From: Faibanks Ak.
Oil change 21.5 miles overdue or sucking oil it isn't suppose to lope more likely a bad injector or two, but oil effects them too. When the strokes first came out the dealers answer for everything as in hard starts or rough running was change the oil.
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No it doesnt have to do with oil or anything. Well..... I guess potentially that would be possible. But they are doing this on purpose. They call it the resistor mod. You swap out a resistor in the electrical system for a different size one. It is supposed to increase fueling and responsiveness with the downside being the bad idle. Nobody seems to explain why exactly the idle becomes this way however.
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Post Fiend
Joined: Nov 2003
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From: Nutter Fort, WV
I have read about it a little.
Since the Stroke throttle works off resistance sending that value tot eh computer, the resister added to the throttle circuit make the computer think the throttle can go through the floor.
I however have not read enough about it to understand why it does not raise the base idle RPM as well.
Since the Stroke throttle works off resistance sending that value tot eh computer, the resister added to the throttle circuit make the computer think the throttle can go through the floor.
I however have not read enough about it to understand why it does not raise the base idle RPM as well.
Cargo Master
Joined: Oct 2008
Posts: 3,330
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From: Eaton, CO
Maybe the stroke was cold still and he was experiencing the romps.
The romps are common with strokes. Supposedly synthetic oil cures them. I've never had the romps with my stroke and run dino oil. I've had rough starts w/o plugging it in during single digits and below zero temps, but no romps.
The romps are common with strokes. Supposedly synthetic oil cures them. I've never had the romps with my stroke and run dino oil. I've had rough starts w/o plugging it in during single digits and below zero temps, but no romps.
