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Old 10-12-2014, 07:52 PM   #1
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Question Running Lean :dance:

Hey everyone,
I've recently added a K&N 57 series CAI on my '99 V6. Now the computer is throwing me a lean bank code (P0174/P0171). I'm not really familiar with fuel adjustments on EFI engines, whats the best and cheapest fix. I'm replacing the PCV valve as recommended by my code reader, but would it be worth running it to a dealer and having them do it? I do not have a tuner and waterfowl hunting this year has tapped most of my spare cash. Thanks.
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Old 10-12-2014, 09:16 PM   #2
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Check for any air leaks on the CAI that you just installed... Especially, in between the MAF and the throttle body. If that all checks out good, remove the Mass Air Flow sensor and inspect it for any contamination and clean it if you haven't already done so.
This code can also be caused by a clogged fuel filter or a weak fuel pump, but since the CEL showed up immediately after installing the CAI, I'd give that a thorough inspection first.
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Old 10-12-2014, 09:26 PM   #3
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The code showed up about a day ( about 25km worth of driving) after the install. All of the clamps and connections are tight and not leaking. There was a BBK intake on it before I added the K&N one. I'll pull the MAF sensor and give it apart of cleaner hopefully that will take care of the issue.


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Old 10-12-2014, 09:33 PM   #4
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Yeah, thats about the right amount of kilometers to trigger the code right after you worked on it.
Have a look at the MAF. It may have become contaminated with the oil from the filter.

Keep us posted!
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Old 10-12-2014, 09:35 PM   #5
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Yeah for sure guys. It's also throwing a C1095 code for the ABS. I think it might be a bad sensor, the previous owner changes the brake fluid maybe he forgot to plug in a sensor?



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Old 10-12-2014, 09:46 PM   #6
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Maybe. The wheel sensors get a metallic "fuz" on them. You can check that.
My ABS has been non-op ever since I bought my car.
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Old 10-12-2014, 09:48 PM   #7
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I don't really car for ABS and the code doesn't affect the main braking system. I'll fix it eventually.


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Old 10-15-2014, 09:32 PM   #8
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Quote:
Originally Posted by straybullitt View Post
Yeah, thats about the right amount of kilometers to trigger the code right after you worked on it.
Have a look at the MAF. It may have become contaminated with the oil from the filter.

Keep us posted!
Ive cleaned MAF and I'm still having the same issue. I used my code reader to clear the DTC codes and I left the battery disconnected over night and today the first start went well. I'm still having RMP fluctuations and its still idling like is not getting enough fuel (mild revving). After I went for a drive (about 15kms) and let the car cool down exactly the same problem it was very hard to get the car to turn over, no check engine light tho. I'm having a new PCV valve and fuel filter installed this friday ay my local Ford dealer. I'm also going to get them to check for air leaks in the intake and exhaust. It's also been mentioned that I might need a tuner if the repairs do not fix the problem, thoughts on this. I have looked at a BAMA chip and tuner, id rather the tuner over the chip bc i don't like the idea of "Scraping" plastic off of the computer port to install a chip.
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