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88gt novi 1000 30#injectors,sct chip,lmaf,afpr set at 38-39 vac off.after chip,inj,and lmaf,i was getting code 42.when motor is warm it has tip in stumble,pops throw intake.the ecu is trying to lean it out,and that what causes stumble and poping. the only way to get it to run ok is to unplug o2 sensors.is this a chip problem?or how can i fix this? novi 88
 
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