Looking for some pointers as to where to look for the cause of this problem.
Trying to establish a baseline prior to making some changes to an ITS car. Its an 86, with 86 computer, injectors and harness but 89 engine and AFM. AF is constant around 14:1 but one dyno pull gives 125 HP and the next gives 165 HP. We think that for some reason the system may be pulling timing back. Other than a problematic CAS (is this likely to be inconsistent?), what sensor(s) would cause the ECU to do this if they were going bad?