Elusive P0352 Code
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From: South Surrey
Elusive P0352 Code
My 2006 F250 5.4l is giving a P0352 code. The plugs have only 10,000miles. I swapped plugs with cylinder 1 swapped COPs from cyl 1 and 5. The P0352 stays with the cylinder, not the plugs or the COP. I followed the diagnostics from the 2006 Ford service DVD. I lost the DVD and had a hard copy for some of this so I don't know where the coil relay is to test it. The PCM harness lays on the connector for the cylinder 2 COP, so I tied it away. Currently the error doesn't come up and the truck runs well since I have removed the harness and put it back in and tied it off. I suspect the harness and I have found erratic readings on cyl 2 through the harness but it could have been me. One of the test at 1 point read 0 volts though the harness to ground at cyl 2 and 12.4 Volts through all the others. Odd since as I understand it they all should read less than 1V. I reconnected the harness expecting the error but the error code was cleared drove it 50miles no problem. But this has been happening the last week I am sure it will be back. Disconnected the PCM harness again and through the harness to negative is 12.4V for all 8 cylinders. I am quite certain I my contact to my voltmeter was good both times but I could have screwed up
Last edited by cc35mki; Sep 26, 2012 at 09:01 PM. Reason: Incomplete
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Thanks for the help but compression is consistent and well within specs for cylinders 1 & 2. That's all I tested. I am under the impression from presumably reliable sources p035x codes do not trigger with poor compression. But I still tried it out. It is easy to reliably trigger p035x codes on a given cylinder by disconnecting the COP connector. I prefer not to because of the possibility of washing down the cylinder and overheating the cats. I think the injector shuts down but I am not sure of that.
At the moment it is running great but the problem comes back. It has 200,000miles but it looks great inside and out. Except for this the truck runs and drives great. Well maybe the rear springs sag a bit, but the air springs compensate for it. Except for the odometer it gives the impression of having low miles. Besides I really like it so I don't want to give up on it, that and economics.
At the moment it is running great but the problem comes back. It has 200,000miles but it looks great inside and out. Except for this the truck runs and drives great. Well maybe the rear springs sag a bit, but the air springs compensate for it. Except for the odometer it gives the impression of having low miles. Besides I really like it so I don't want to give up on it, that and economics.
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From: SE PA
Why are you swapping 1/5 and not 2?
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I didn't explain that well at all. I exchanged COPS 1 & 2 and 2 & 5. The code stayed with the cylinder.
I am quite convinced this is in the harness but I see no way of proving it without cutting into the harness. A pigtail that fits into the COP from Ford lists at $56 Cdn that I can use to prove or disprove but that is expensive and destructive. I might have to take it to the Ford dealer, and they have always been good to deal with, but this will be expensive and quite likely not conclusive.
At one point during all this the air conditioner was not working.
I am quite convinced this is in the harness but I see no way of proving it without cutting into the harness. A pigtail that fits into the COP from Ford lists at $56 Cdn that I can use to prove or disprove but that is expensive and destructive. I might have to take it to the Ford dealer, and they have always been good to deal with, but this will be expensive and quite likely not conclusive.
At one point during all this the air conditioner was not working.
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There is more to misfire than just the plug firing. Have you thought about a bad fuel injector? Might also try swapping the plugs, number 2 with another one. Just something else to think about. Could be the harness, but there is also some other stuff left untested as of yet.
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From: South Surrey
There is more to misfire than just the plug firing. Have you thought about a bad fuel injector? Might also try swapping the plugs, number 2 with another one. Just something else to think about. Could be the harness, but there is also some other stuff left untested as of yet.
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