Bad Injector #5
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Senior User
Joined: Dec 2006
Posts: 163
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From: Oceanside, ca
Bad Injector #5
Recently I had a p0273 code, CEL, supposedly it's the #5 injector, second one near the firewall on the pass side head.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
Recently I had a p0273 code, CEL, supposedly it's the #5 injector, second one near the firewall on the pass side head.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Logistics Pro
Joined: Dec 2004
Posts: 4,138
Likes: 7
From: South Weber, Utah
Recently I had a p0273 code, CEL, supposedly it's the #5 injector, second one near the firewall on the pass side head.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Pulled all the injectors, re oringed, cleaned them all. Same code. Replaced injector #5, while it did run better, the CEL went off but still the same code and same shaking at 1500rpms, ect. So then I replaced the injector harness. Same code. New IPR Valve, same code.
The weird thing to me is that it runs better cold then hot. When it's cold you cannot notice it has an issue. When the EOT get over 125 degrees is when it begins to idle erratic and shake at 1500 rpms. To me this tells me it's a mechanical issue rather then an electrical.
The only thing I can think else I can think of replacing is the injector cup sleeve. Other then that what could it be?
ficm in and out volts are good, plenty of icp starting and running. IPR is ok, camshafts are in sync. I don't know what to do now.
Thread Starter
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Senior User
Joined: Dec 2006
Posts: 163
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From: Oceanside, ca
I took every injector all the way down. Cleaned everything. After i cleaned them I still had the code and syptoms but they were not as bad. So then i replaced the injector with a new one, syptoms got better but it's still not running 100%. Like i said i replaced the harness so my next guess is the ficm is messed up, but i know what would be rare. It is a reman ficm that was replaced at 85k, i now have 136k.
Tuned
Joined: Jun 2006
Posts: 420
Likes: 3
I had the same thing happen to me after I had pulled the spool valves out for a cleaning (ran great cold, started to stumble once it got up to operating temps). What ended up happening was I had tightened the spool valve nut&bolt down too much and was causing the spool valves to hang up when hot. Everything was and has been fine and dandy since I repulled all of the injectors and lightened up on those bolts. I read one write up on here that the poster (name slips at this time) was stating that's those spool bolts only need a .5nM on them. Just to give you an idea how little that is 1nm = about .75 foot pounds. I would recheck those little nuts&bolts before looking at big $$$ items.
Thread Starter
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Senior User
Joined: Dec 2006
Posts: 163
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From: Oceanside, ca
Well like I said, I replaced injector 5 with a brand new injector so I would highly doubt that the one I rebuilt and the new one was torqued to much.
It this point I would gladly replace the ficm if that was the problem. I don't care about cost, I care about not opening up a valve cover for the 10th time or so.
Is there anyway to test the voltage going into each injector with a SC2?
It this point I would gladly replace the ficm if that was the problem. I don't care about cost, I care about not opening up a valve cover for the 10th time or so.
Is there anyway to test the voltage going into each injector with a SC2?
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Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
Just the ficm main power at 48 volts. You can ohm out the injectors from the ficm plug, easiest way would be to look at your old harness see which 4 wires go to injector 5 and see if those resistances match another injector. Simple process of elimination tells me the ficm needs sent to ficmrepair.com
I have personally sent mine to this shop and nothing but top notch quality and service. A low circuit code indicates a bad connection somewhere to injector 5.
I have personally sent mine to this shop and nothing but top notch quality and service. A low circuit code indicates a bad connection somewhere to injector 5.
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Lead Driver
Joined: Dec 2006
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From: So. Jersey
Well like I said, I replaced injector 5 with a brand new injector so I would highly doubt that the one I rebuilt and the new one was torqued to much.
It this point I would gladly replace the ficm if that was the problem. I don't care about cost, I care about not opening up a valve cover for the 10th time or so.
Is there anyway to test the voltage going into each injector with a SC2?
It this point I would gladly replace the ficm if that was the problem. I don't care about cost, I care about not opening up a valve cover for the 10th time or so.
Is there anyway to test the voltage going into each injector with a SC2?
There are 2 other voltages you can check with a SG2, FICM VEHICLE & FICM LOGIC. Both should be battery/charge voltage.
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Senior User
Joined: Dec 2006
Posts: 163
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From: Oceanside, ca
Thanks guys. I just ordered a new ficm from ficm repair. If nothing else having a new ficm will help me sleep better at night even if that is not the problem.
This is my 3rd 6.0 and I told myself from the beginning I was going to not be cheap if I have any problems with this truck. Repair everything better then new.
After I get this injector thing figured out all I need is a new turbo, egr cooler and headstuds/gaskets.
This is my 3rd 6.0 and I told myself from the beginning I was going to not be cheap if I have any problems with this truck. Repair everything better then new.
After I get this injector thing figured out all I need is a new turbo, egr cooler and headstuds/gaskets.
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Senior User
Joined: Dec 2006
Posts: 163
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From: Oceanside, ca
It was an OEM reman.
I emailed Ed today and he said the code is a very common issue with the factory ficms. So that gave me hope that I made the right choice. Sometime before the new ficm goes on I will have both alts rewound by a guy that does great work. I'll buy two new batteries also seeing how I can't find a date on the batteries in the truck, weird right?
I emailed Ed today and he said the code is a very common issue with the factory ficms. So that gave me hope that I made the right choice. Sometime before the new ficm goes on I will have both alts rewound by a guy that does great work. I'll buy two new batteries also seeing how I can't find a date on the batteries in the truck, weird right?
Tuned
Joined: Jun 2006
Posts: 420
Likes: 3
i'm curious to what your original problem was. just a code, or was it running rough at 1500rpm also? how does it idle cold and warm? have you pulled any live data like icp, icp volts, ipr both koeo and koer? wondering if it could be something else that is being overlooked. have you done a bubble test? might not be your problem but it wont cost you a nickle to do either.