Originally Posted by fedxideliver 146000 miles and it was the zzp 1.0 tune my af ratio gauge was rich when it happened and 0 boost Wideband or narrowband? It may have developed a stress crack sometime earlier and finally went, i've seen that before. The 1.0 pcm is really only tailored to those certain mods, i would get a custom tune or a mail order tune since you have the ability to scan.
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