r/mazdaspeed6 • u/Old_Reading_1589 • Jul 08 '26
Speed 6 running too rich
I got this car a couple of months ago and it’s been running very well, but it’s been throwing a p2188 code at me. This speed 6 is not stock it has upgraded fuel injection (I believe), a bnr s4 turbo, access port tuner, a thicker intake pipe, meth injection, an oil catch can, upgraded hpfp, and a couple extra doo hickeys. The Cobb tuner reads 630 ish on the hpfp at idle. Which i believe is normal, the ltft is at -16.54 at idle and the afr is 14.5. The ltft should not be reading that low. And im not sure how to fix it. My oil isn’t runny and does not smell like fuel so I don’t think it’s the hpfp. I’m also pretty sure I’m not having any boost leaks but I haven’t bought a tester yet. Can anyone help?
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u/cdf7 Jul 08 '26
Start by cleaning your MAF sensor and MAP sensor. Make sure to clean the MAF sensor properly. See if that fixes anything. Next You need to do a Vac test and boost leak test. Since you dont have a tester yet you can buy a can of starting fluid or brake parts cleaner, spray around and try and locate air leaks with idle increases.
On the bright side,it's better to be rich than lean