Not Your Common Rough Idle (04.5 LLY)
- Thread starter hopkins_fam
- Start date
Mine also shows "PCM IN VTD FAIL - YES" when NO should be displayed. How do you correct that? Could that be my whole problem? Sorry for the surge of info Im just trying to get all the details so hopefully someone can find out what'd going on
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After clearing the codes and throwing the Xcelerator back on (updated the software version). Im not getting EGR codes any more and nothing has popped up about Fuel Temp again. I went ahead and added sonera 2-Stroke to this fill-up to see what happens.
I have to goto Pittsburgh tomorrow for 3 days then 2 weeks of work in Wheeling,WV/Cambridge OH area. While Im up north Im gonna try and find a FICM at a reasonable price, any one know anybody in that area?
I have to goto Pittsburgh tomorrow for 3 days then 2 weeks of work in Wheeling,WV/Cambridge OH area. While Im up north Im gonna try and find a FICM at a reasonable price, any one know anybody in that area?
Im not positive but I think the ppe flash disables the fuel temp from throwing an out of range value. I have seen an lly behave like yours and the it just needed the bcm and ecm cleaned and reflashed. After that I just reinstalled the ppe and it's been good since. I just think you have a corrupt file...
That's not bad I can handle that. I feel my problem now id going to be finding a dealer that will do what Im asking and not want to do a whole run down or something.
Anyone know any good dealers that can just reflash for me in Northern WV, Eastern OH, or around Pittsburgh?
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Anyone know any good dealers that can just reflash for me in Northern WV, Eastern OH, or around Pittsburgh?
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Not much of a update. I got my used FICM in the mail yesterday. Threw it on and also but the factory filter & head back in the original spot. Then i moved my CAT water seperator & head back before the lift pump. Also replaced all my fittings with push-loc jic and threw new hose on.
Got it all back together and fired it up, thought fir sure it was fixed. Before this even at cold it idled fine but when reviving you could feel a miss and it was noisy like a old 7.3. Well this time she was ad quite and smooth as my bosses 2013 LML. I've never heard this truck sound this good. Truck hit 165° and still going good, fuel rate was still holding 6-7mm3. Ran inside and came back out and there was my rough idle back again.
Do now Im back to square 1. Today Im gonna pull the crank sensor and check the wheel. And even though I've checked the FICM wiring 3-4 times, Im gonna pull all the loom and tape back off the whole harness up to the turbo, even open up the plastic piece and check through it.
Im lost, but hopefully something will poke its head out today and say here i am fix me!
Got it all back together and fired it up, thought fir sure it was fixed. Before this even at cold it idled fine but when reviving you could feel a miss and it was noisy like a old 7.3. Well this time she was ad quite and smooth as my bosses 2013 LML. I've never heard this truck sound this good. Truck hit 165° and still going good, fuel rate was still holding 6-7mm3. Ran inside and came back out and there was my rough idle back again.
Do now Im back to square 1. Today Im gonna pull the crank sensor and check the wheel. And even though I've checked the FICM wiring 3-4 times, Im gonna pull all the loom and tape back off the whole harness up to the turbo, even open up the plastic piece and check through it.
Im lost, but hopefully something will poke its head out today and say here i am fix me!
The main problem on the harness you need to look for is up by the alternator.
Also I think the reason your fuel rate is bouncing around is from the ecm trying to cut fuel and bring the idle back to where it should be.
My truck had a slight lope at idle and wouldn't read balance rates sometimes when I first bought it a few Years ago. After patching up the harness and a new FPR it cleared up. It wasn't a constant miss either, just every few seconds it would chug a couple times then idle fine.
Also I think the reason your fuel rate is bouncing around is from the ecm trying to cut fuel and bring the idle back to where it should be.
My truck had a slight lope at idle and wouldn't read balance rates sometimes when I first bought it a few Years ago. After patching up the harness and a new FPR it cleared up. It wasn't a constant miss either, just every few seconds it would chug a couple times then idle fine.
That's what it doing now, i got the harness open, not finding anything obvious except this wire, have no clue why'd they run it like that. Im wondering if the bend and twist has it broke inside
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Well nothing obvious, only thing i noticed were a few brow spots on the yellow w/ green that runs down the front of the motor. Gonna check the 2 bail connectors tomorrow and see if i can find anything.
Where exactly is the crank sensor at in relation to the balancer? I see the cam sensor below the fan pulley on the passenger side kinda.
Where exactly is the crank sensor at in relation to the balancer? I see the cam sensor below the fan pulley on the passenger side kinda.
Ok now Im really lost.
While playing with the truck today i messed around with a few things. I decided to unplug my little 95gph carter lift pump and see what the readings were.
To my amazement to trucks main fuel rate was actually 5-6 mm3 instead of the 0-4 mm3 jumping everywhere and truck wasn't jumping like it was.
I plugged the pump back in and of course fuel rate went right back to 0-4 jumping everywhere.
Here's the kicker, my primer bulb wants to stay down, i can pull it back up but it sucks itself back down. What's going on here? With the lift pump going the bulbs not firm either? Any input? I have a spare rebuild kit, all the fuel lines are new, valley, FICM, my pre-pump CAT filter.
Could something be going on in the tank? I hold 22-23k at WOT so i know its pulling fuel. Im just really confused, also will the factory CP3 pull fuel through the CAT pre-filter as well if i ditch my lift pump til i can get a AirDog?
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While playing with the truck today i messed around with a few things. I decided to unplug my little 95gph carter lift pump and see what the readings were.
To my amazement to trucks main fuel rate was actually 5-6 mm3 instead of the 0-4 mm3 jumping everywhere and truck wasn't jumping like it was.
I plugged the pump back in and of course fuel rate went right back to 0-4 jumping everywhere.
Here's the kicker, my primer bulb wants to stay down, i can pull it back up but it sucks itself back down. What's going on here? With the lift pump going the bulbs not firm either? Any input? I have a spare rebuild kit, all the fuel lines are new, valley, FICM, my pre-pump CAT filter.
Could something be going on in the tank? I hold 22-23k at WOT so i know its pulling fuel. Im just really confused, also will the factory CP3 pull fuel through the CAT pre-filter as well if i ditch my lift pump til i can get a AirDog?
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Not sure on the primer, but too much pressure to the cp3 will cause a lope. What kind of psi are the little carter pumps good for?
Specs said 3-5 psi 95 gph only bad side is they have 1/4" inlets/outlets. I have mine converted to jic fittings (#8 or #10).
I just had to run out to the store real quick and noticed up to half throttle without the lift pump done great anything more and it started falling on its face.
So either my filters are gelling again or water again!! Or I have a restriction somewhere now. But with lift pump on i hold 22-23k at WOT
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I just had to run out to the store real quick and noticed up to half throttle without the lift pump done great anything more and it started falling on its face.
So either my filters are gelling again or water again!! Or I have a restriction somewhere now. But with lift pump on i hold 22-23k at WOT
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Your filter is before the pump? Not sure how those carter pumps like that, especially with 1/4" inlet. You can take that pump apart to, they have an inlet screen. IMO put the filters after the pump, the very little dirt that goes through the system won't hurt them. I'm not entirely sure those pumps are flow through.
The specs said it was flow through but not sure its working that way.
I originally had the CAT filter and head in place of the factory unit, after my filters gelled last week i threw the factory unit back on for the heater and moved the CAT filter to pre-pump. With the pump on it does fine. Only at idle the main fuel jumps around. (stays real low jumps around 0-4 mm3)
With the pump off the main fuel looks good, holds a 5-6 mm3 at idle when warm. I think Im gonna redo the whole system, and just ditch the carter for now.
Will the CP3 be ok pulling fuel through the factory unit and the CAT filter?
I originally had the CAT filter and head in place of the factory unit, after my filters gelled last week i threw the factory unit back on for the heater and moved the CAT filter to pre-pump. With the pump on it does fine. Only at idle the main fuel jumps around. (stays real low jumps around 0-4 mm3)
With the pump off the main fuel looks good, holds a 5-6 mm3 at idle when warm. I think Im gonna redo the whole system, and just ditch the carter for now.
Will the CP3 be ok pulling fuel through the factory unit and the CAT filter?
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Im gonna remove the lift pump tomorrow and remove the primer bulb from the factory head and see what's going on.
If i try to prime with the truck off it'll pump up but after s couple pump it'll push straight down with no resistance. So its either got air leaking some where or its holding suction? Im nite quite sure
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If i try to prime with the truck off it'll pump up but after s couple pump it'll push straight down with no resistance. So its either got air leaking some where or its holding suction? Im nite quite sure
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