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Old 05-02-2013, 02:17 PM   #1
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Help with P0171 and p0174

Dam codes are still here .. P0171&P0174 how can i identify a vacuum leak? How do i tell if my 02's are bad? I changed my MAF cleaned TB and IAC valve, ran sea foam threw gas tank and spray threw intake then changed fuel filter. Car idles around 1k at a stop and if i have the heat on it'll go from 8-1300 it idles slightly rough and its been happening since i used k&n filter recharger
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Old 05-02-2013, 02:20 PM   #2
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Originally Posted by Rich04 View Post
Dam codes are still here .. P0171&P0174 how can i identify a vacuum leak? How do i tell if my 02's are bad? I changed my MAF cleaned TB and IAC valve, ran sea foam threw gas tank and spray threw intake then changed fuel filter. Car idles around 1k at a stop and if i have the heat on it'll go from 8-1300 it idles slightly rough and its been happening since i used k&n filter recharger
I'm in the same boat with you and have thrown money and time and cleaning and stuff at it and still nothing I'm completely at a loss to what the solution is, I did fuel filter, fuel pump, MAF sensor cleaner, TB and IAC cleaner, changed my O2s, changed my cam position sensor and still nothing
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Old 05-02-2013, 04:01 PM   #3
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To test for a vacuum leak take a can of starting fluid and spray all around your vacuum lines and gaskets. If the idle picks up after you spray then you found your leak
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Old 05-02-2013, 04:44 PM   #4
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Dam codes are still here .. P0171&P0174 how can i identify a vacuum leak? How do i tell if my 02's are bad? I changed my MAF cleaned TB and IAC valve, ran sea foam threw gas tank and spray threw intake then changed fuel filter. Car idles around 1k at a stop and if i have the heat on it'll go from 8-1300 it idles slightly rough and its been happening since i used k&n filter recharger
This is the exact same thing that happened to me. Go get a new filter at Oreily or PepBoys they are about $20-25 and do not oil it. Clear your codes and put the new filter on. This will fix your problem.

I did the same thing. I took off my filter cleaned it and re oiled. Then I started get the same codes. Once you over oil the filter they will not work correctly even after trying to get the oil out by cleaning.
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Old 05-02-2013, 06:02 PM   #5
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This is the exact same thing that happened to me. Go get a new filter at Oreily or PepBoys they are about $20-25 and do not oil it. Clear your codes and put the new filter on. This will fix your problem.

I did the same thing. I took off my filter cleaned it and re oiled. Then I started get the same codes. Once you over oil the filter they will not work correctly even after trying to get the oil out by cleaning.
Im gonna give it a try thank you so much! That would make my car run rough aswell?
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Old 05-02-2013, 08:18 PM   #6
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Im gonna give it a try thank you so much! That would make my car run rough aswell?
Oh yes...... My stang was sucking gas, running rough and codes.
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Old 05-02-2013, 09:32 PM   #7
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Oh yes...... My stang was sucking gas, running rough and codes.
I tried to get a filter they don't have one that fits -_-
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Old 05-02-2013, 09:45 PM   #8
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I tried to get a filter they don't have one that fits -_-
Look around..... It doesn't have to be a K & N.
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Old 05-03-2013, 11:57 AM   #9
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Look around..... It doesn't have to be a K & N.
I know , im gonna find one today
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Old 05-07-2013, 06:56 PM   #10
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My friend gave me a filter but uhhh heres the problem
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Old 05-08-2013, 02:47 PM   #11
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My friend gave me a filter but uhhh heres the problem
you should be able to get a adapter to reduce it in size. Or buy the correct size off E bay.
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