You should be about to jump the pins on the ADL and the ECM will flash the codes via the check engine light.
How long after starting? 1-2 minutes. Sounds like it could be an O2 sensor. Once it goes into closed loop and the O2s aren't right the ECM goes into LHM while will kill the performance.
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93Z M6 Black: The 385 Lives! Supercharged, 3-core front mount intercooler, GTP heads, 3:73's, Street twin clutch, Jethot Longtubes, Mufflex 4" catback/spintech, S+W cage, Spohn Suspenion, Yada Yada Yada
1) Build it
2) Race it
3) Break it
4) Repeat!!!
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