I have an 03 F250 5.4l that is running like complete crap everytime that it rains or everytime there is moisture in the air. I get a P0325 code for the knock sensor. Last weekend I replaced the knock sensor and also replaced the plugs and boots and filled them with dielectric grease.

Does anyone else have any ideas what is causing this knock sensor code. Because it is obviously not the knock sensor itself. Never had issues with this truck until I paid it off 2 weeks ago and its been downhill since then. Somebody please help

 

when I took the intake off i only saw one knock sensor on the passenger side. Is there another located somewhere else or is that the only one?

 

Symptoms sound like a bad coil pack.
Is that the only code you ever got.

 

Yes the P0325 is the only code im getting in the stored codes. How can I test the coil packs?

 

bump....

Is there anyway to check the coil packs?

I do have a diablo tuner installed that will give me live data feed. Is there anything I should be looking at to help me narrow down the issue?

 

I'm beginning to lose my mind.. Can anybody help me. Truck runs great until it rains or gets wet then it runs like ****.

 

I took mine to the dealer and they ran a scan on it and told me which coils were bad. It was around $100 to have it done.

 

Local shop did a scan on it and got a P0605 code for the ECM internally grounding.... I dont know if this is because of my tuner or not