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what code/cel comes up?

And a header.

Maybe stick to working on jeeps?

Can that scanner u got read fuel trims? What's your STFT right before you go into closed loop?

And a header..... Haha

Nope cant read fuel trims. Im assuming its just because of the intake. Being optimistic. Hoping i can get my hands on one sooner than two weeks. Then ill
Have some answers

or maybe you should stop driving it till you can get tuned...both a header and a intake are tuneable mods.

Does the car run/idle fine with the MAF disconnected?

Ok so update!! Got stock intake. Installed and unplugged battery overnight. Car ran great for an hour and a half. No stalls no sputters then BAM check
Engine light. My 3 other codes were wiped. The p0172 and p117 0/b. Which is what was causing my idle and stall.

Now im getting p0420 which i wasnt before!? Havent touched the header or o2s. Deleted the code. Wonder if it will come back? Any negative side effects of driving with p0420? What are my options in fixing it permanently
Other than putting stock header on. Which im not doing. Would a rear o2 spacer help!? I remember a previous member saying something of the sort
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2013 silver frs, injen intake, agency power header, hks exhaust, no kitties.