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<blockquote data-quote="02_lightning_NP" data-source="post: 8374093" data-attributes="member: 69225"><p>I've been working to fix my lightning for about a month now. most fo you will remember the last post i put up i kept throwing the infamous p0171 and p0174. No matter what i tried i couldnt figure out why i was throwing these damn codes. Well now I;m back with a new problem. I clear the codes and not even five minutes later they pop back up where as it used to take a couple days if not a week depepnding on how i drove her. She's idleing a bit low around 550rpms and it seems like I'm not getting any boost now, I should be reading 16 pounds at full throttle but i only show maybe 10 psi now at wot.Even at that it doesnt feel like Im getting any extra power from the boost, i feel like im running all n/a. Anyone have any ideas? Even when i crank up the truck it sounds a little weak. Could a vacuum leak cause this? What am i missing here? ANY ideas are appreciated. Where do i start....:??:</p><p>Imonly throwing those two codes....oh and i noticed today climbing a hill to my house that my air fuel ratio fell below 10.0 for a few seconds but on level ground it stayed around 14.4-14.7. I didnt start having any issues till i swapped on my new MP.</p></blockquote><p></p>
[QUOTE="02_lightning_NP, post: 8374093, member: 69225"] I've been working to fix my lightning for about a month now. most fo you will remember the last post i put up i kept throwing the infamous p0171 and p0174. No matter what i tried i couldnt figure out why i was throwing these damn codes. Well now I;m back with a new problem. I clear the codes and not even five minutes later they pop back up where as it used to take a couple days if not a week depepnding on how i drove her. She's idleing a bit low around 550rpms and it seems like I'm not getting any boost now, I should be reading 16 pounds at full throttle but i only show maybe 10 psi now at wot.Even at that it doesnt feel like Im getting any extra power from the boost, i feel like im running all n/a. Anyone have any ideas? Even when i crank up the truck it sounds a little weak. Could a vacuum leak cause this? What am i missing here? ANY ideas are appreciated. Where do i start....:??: Imonly throwing those two codes....oh and i noticed today climbing a hill to my house that my air fuel ratio fell below 10.0 for a few seconds but on level ground it stayed around 14.4-14.7. I didnt start having any issues till i swapped on my new MP. [/QUOTE]
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