Hi guys, once again I almost got bit by making my easy to solve problem hard yet someone was looking out for my dumb ass.
My new to me 07 CV Sport started to stumble and surge at idle plus it seemed to lack power and I thought I could hear a light spark knock under light acceleration not to mention a rattling at idle like I had really loud injectors or carbon bouncing around in the cylinders it also had a miss at idle that seemed to coincide with the noise under the hood.
When I bought this car all the maintenance records were up to date the car had new fluids, Battery and other things done and was supposed to be Ford Certified.
Well anyways I knew for sure Ford or the previous owner would have changed the air filter so I was not even going to look at it.
To start my diagnosis the first thing I did was scan the car for pending codes and I didn't find any, So I removed the plastic engine cover to check for vacuum leaks and of course dropped the nut under the air filter box.
I wanted this nut back so I stopped the diagnosis and I pulled the air cleaner housing off revealing the worlds dirtiest air filter and the lower housing was filled with leaves and other debris. ( like this car has never ever had a new filter ) in fact the filter was so plugged up it was deformed and sucked up into the top air filter housing lid allowing it to bypass some.
After I removed the lower housing and cleaned it up also locating the nut I dropped I tested the car without a filter at all and the car runs like new. ( no more noises and it runs like a fine Swiss watch )
Had I not dropped that nut I am not sure how long it would have taken me to inspect the filter ( sure I would have got around to it but I had no clue it could have been that bad because of the clean engine oil and transmission fluid and other signs maintenance was up to date )
I guess I would rather be lucky than good at this point.
However now I have to wonder just how much debris made it past the filter in to the cylinders.
I ordered a new filter but I think I will have someone change the engine oil and filter even though it still looks new just to be on the safe side.
Hopefully any debris that got in the cylinders has already passed through and will just get burnt up in the front of the cats.
After the oil change I plan on replacing the spark plugs and coils and I will inspect the cylinders and pistons for damage with my lighted Otoscope, I am not expecting much if any damage since the debris I found was soft and I did not drive the car very long once I noticed the symptoms.
If there is anything else you would do if this was you car please feel free to share your thoughts. any help would be appreciated.
My new to me 07 CV Sport started to stumble and surge at idle plus it seemed to lack power and I thought I could hear a light spark knock under light acceleration not to mention a rattling at idle like I had really loud injectors or carbon bouncing around in the cylinders it also had a miss at idle that seemed to coincide with the noise under the hood.
When I bought this car all the maintenance records were up to date the car had new fluids, Battery and other things done and was supposed to be Ford Certified.
Well anyways I knew for sure Ford or the previous owner would have changed the air filter so I was not even going to look at it.
To start my diagnosis the first thing I did was scan the car for pending codes and I didn't find any, So I removed the plastic engine cover to check for vacuum leaks and of course dropped the nut under the air filter box.
I wanted this nut back so I stopped the diagnosis and I pulled the air cleaner housing off revealing the worlds dirtiest air filter and the lower housing was filled with leaves and other debris. ( like this car has never ever had a new filter ) in fact the filter was so plugged up it was deformed and sucked up into the top air filter housing lid allowing it to bypass some.
After I removed the lower housing and cleaned it up also locating the nut I dropped I tested the car without a filter at all and the car runs like new. ( no more noises and it runs like a fine Swiss watch )
Had I not dropped that nut I am not sure how long it would have taken me to inspect the filter ( sure I would have got around to it but I had no clue it could have been that bad because of the clean engine oil and transmission fluid and other signs maintenance was up to date )
I guess I would rather be lucky than good at this point.
However now I have to wonder just how much debris made it past the filter in to the cylinders.
I ordered a new filter but I think I will have someone change the engine oil and filter even though it still looks new just to be on the safe side.
Hopefully any debris that got in the cylinders has already passed through and will just get burnt up in the front of the cats.
After the oil change I plan on replacing the spark plugs and coils and I will inspect the cylinders and pistons for damage with my lighted Otoscope, I am not expecting much if any damage since the debris I found was soft and I did not drive the car very long once I noticed the symptoms.
If there is anything else you would do if this was you car please feel free to share your thoughts. any help would be appreciated.
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