First, is it possible to fix you cold air intake, leaks worsen with time and that might be the issue.
Those codes are for lean bank 1 and bank 2. When you got the O2 sensors, you got ones for the front right?, because if I remember right the front and back have different part numbers and I believe they are side specific too. Double check right is on right and left is on left.
Check for vacuum leaks on your pvc system also could have a bad pvc valve. That is the tube that goes across the top of the engine, from the passenger side valve cover to the cold air intake.
Try jacking up the car again and also double check that the exhaust is all tight including the manifolds. Don't know why your system broke but it could have affect the manifolds/headers if you have them too.
Lastly, I know this is out there but have you check you fuel filter. I am taking a while guess but a clogged fuel filter of fuel injector might cause you to run lean.
Hope this gives you some direction and report back any progress please
Where is WMBURNS when you need him!!!
Part numbers from the original o2 sensors are the same and yes I am certain I got upstream o2 sensors. Actually had to go to two advance autopart stores to get 2 total sensors. Part numbers for the new o2 sensors are correct. No left or right and not on the old ones either. The part number for the factory Ford o2 sensors are the same and no difference between the two.
Basically I bottomed out hard in a 7 day span twice and busted the passenger exhaust flange 1 of the 2 nuts loose. A few days later in a mild snow the driver side hit on the exhaust flange and knocked out both nuts. So basically when I got under the car. It was like I was running open headers.
The day I installed the O2 sensors I checked all connections on the exhaust again. There is not an exhaust leak at all on this car anymore. I was plagued with exhaust leaks for a while but its fixed. The cars exhaust sounds really really good. Exhaust leaks are easy to hear on this car with the setup I have.
The tube that goes across of engine from driver side valve cover to cold air intake was deleted like 2 years ago. The intake hole there was capped off with a rubber plug and the spot on the valve cover on the drivers side where the tube was. Has a mini breather on it.
Actually the fuel filter was replaced with a factory ford filter a few months back.
The Cold Air Intake could be ghetto rigged maybe to make sure the small leaks are sealed. I'm ordering a new one anyway.
Here is a list of things checked and replaced.
Exhaust leaks are fixed. Only 2 points. 100% now
Front (Upstream) O2 sensors replaced with correct part numbers installed and tight.
Cold Air Intake - Iffy, definately not 100% and has 2 small leaks (1 is fixed and 1 is not, but keep in mind these leaks which haven't gotten bigger have been like that for 9-12 months prior to the engine codes) New CAI is on order.
Fuel Filter - OK
PCV has not been checked or replaced
EGR has not been checked or replaced
Voltage on TPS is not perfect. I think perfect was .97 to .99 but Ford says something along the lines of .5 to 1 can't remember at all what it was cause this was 2 years ago. But within Ford recommended voltage range
As far as vacuum hoses. I've looked up and down and all over the place. Can't find anything loose, undone, cracked, etc etc.
I want to say these codes did not pop up until the passenger side exhaust flange busted its leak. It was the same day. Prior to that exhaust leak the Cold Air Intake had the 2 small leaks. Without any codes.
Hope this helps
Now should I look into ACT, Intake manifold, replacing EGR.
At WOT the car seems to be dead on 100% performance. Acts like a normal bolt on geared GT should feel.
I thought the codes were basically saying o2 sensors reading lean but compensating and putting the car into a "Just keep me running mode and running rich rich"
Gas Mileage around town dropped to 10 miles to a gallon. A full tank of gas with all in town red to red light driving would be around 160 miles and a all highway trip on a full tank would net me 200 miles total. So gas mileage was 10/12 which I can't say sounds lean to me.
I think I might have had a domino effect thing go on. But before I replaced these o2 sensors. My knowledge of cars told me. The extra air that the o2's were seeing with the exhaust leak being right in front of them is what threw the codes, well along with the leak. But now I don't know.
Should I be worried now about my mini Cats on the
Pypes xpipe?