Intermittent rough idle
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Senior User
Joined: Dec 2004
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From: Central,IL
Intermittent rough idle
Intermittent rough idle
Ok, I have another issue with me truck. Every now and then while driving around, the engine will start running rough like it isnt firing on all cylinders. There are times it will smooth out within a minute or two, and other times I have to let it sit overnight before for it to run smoothly. This has been going on now for a year, but like I said, it has been intermittent.
In the past when this has happened, I could never pull any codes using sct x3 programmer. Well today the issue came back, so I hooked the programmer up and finally got some codes.
Here is what I got:
1. P0269 - Cylinder 3 Contribution Balance
2. P0403 - Exhaust Gas Recirculation Circuit
3. P0405 - Exhaust Gas Recirculation Sensor A Circuit Low
4. P0611 - Fuel Injector Control Module Performance
Now the run down on my truck. Its 2004, with 142k miles, egr delete and a tune. ICP sensor reads .26v with the key on and .88v at idle. I tested the FICM, and I got 58.5v with key on and 58.8v at idle.
Ok, I have another issue with me truck. Every now and then while driving around, the engine will start running rough like it isnt firing on all cylinders. There are times it will smooth out within a minute or two, and other times I have to let it sit overnight before for it to run smoothly. This has been going on now for a year, but like I said, it has been intermittent.
In the past when this has happened, I could never pull any codes using sct x3 programmer. Well today the issue came back, so I hooked the programmer up and finally got some codes.
Here is what I got:
1. P0269 - Cylinder 3 Contribution Balance
2. P0403 - Exhaust Gas Recirculation Circuit
3. P0405 - Exhaust Gas Recirculation Sensor A Circuit Low
4. P0611 - Fuel Injector Control Module Performance
Now the run down on my truck. Its 2004, with 142k miles, egr delete and a tune. ICP sensor reads .26v with the key on and .88v at idle. I tested the FICM, and I got 58.5v with key on and 58.8v at idle.
Thread Starter
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Senior User
Joined: Dec 2004
Posts: 182
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From: Central,IL
Thanks for your input
Fleet Mechanic
Joined: Nov 2008
Posts: 1,443
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From: South Alabama
On the 2005 up you need a SCT tuner to turn off codes for a EGR delete. Don't know about the 2004. What do you get on FICM volts during cranking? Injector #3 could be failing or have striction like 6.0only said. Might try Archoil additive to straighten that out before replacing.
Thread Starter
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Senior User
Joined: Dec 2004
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From: Central,IL
On the 2005 up you need a SCT tuner to turn off codes for a EGR delete. Don't know about the 2004. What do you get on FICM volts during cranking? Injector #3 could be failing or have striction like 6.0only said. Might try Archoil additive to straighten that out before replacing.
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Joined: Oct 2016
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Soft codes will log codes in your scanner but not set a light on the dash.
Suspect bad injector #3. You could disengage #3 when it is running rough to confirm #3 is causing the disruption. Best to look at power balance in IDS at a dealership or shop. Or get Auto Enginuity w/ Ford Bundle as next best option.
Stiction would tend to target all injectors equally, but #3 could have a nut coming loose from the spool valve bolt on the top of the injector.
Suspect bad injector #3. You could disengage #3 when it is running rough to confirm #3 is causing the disruption. Best to look at power balance in IDS at a dealership or shop. Or get Auto Enginuity w/ Ford Bundle as next best option.
Stiction would tend to target all injectors equally, but #3 could have a nut coming loose from the spool valve bolt on the top of the injector.
Fleet Mechanic
Joined: Nov 2008
Posts: 1,443
Likes: 9
From: South Alabama
How about this. Use one ;-j I get caught up in the same thing that you are doing and end up doing nothing. So just use one. ;-)
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