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Message: <blockquote data-quote="forddieseltechguy" data-source="post: 1536336" data-attributes="member: 21892">Hey all , I was once part of this forum years ago when I purchased my first sn (97 pacific green cobra) car was great and due to being young and dumb I ended up selling it , anyways I am back but now with a 01 GT recently picked this up with no info on it from the prior owner or owners… this poor thing has been around the block.. anywho after cleaning it up a bit cosmetically I am at a stand still , this thing is running richer than trumps bank account , only codes I’m getting are P0172 for bank 1 being too rich , I went through the normal routine check on all vacuum lines and made sure they are good and not cracked or leaking , also made sure that my intake gaskets weren’t leaking either , data logged some tonight and finding bank 1 is super rich and bank 2 is not , pulled all the plugs and sure enough bank 1 had all the plugs fouled black like it was a diesel. Bank 2 had them all looking perfect , replaced bank 1 sensor 1 02 sensor and same deal, the car idles fine sometimes and other times has a hard time not shutting off so will start to surge , every time I drive the car it doesn’t shut off at lights but definitely can feel the hesitation when going up the RPM’s and then suddenly just opens up and feels fine , real weird to say the least , I then thought maybe this had a tune of some sort that went wrong with a chip possibly and checked the computer , no chip in sight. I’m thinking this is a tuning issue but currently at a stand still. The mods are as followingProfessional products intake manifoldBBK 78mm throttle bodyBBK caiHooker long tube headers (catless) with unknown x-pipethis is all I know about the car up to know as far as engine mods. Any help would greatly be appreciated[ATTACH=full]31642[/ATTACH][ATTACH=full]31641[/ATTACH]</blockquote>