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Re: Tricking The Ecm
Hmm that would explain why my headers have an O2 bung in them. My O2 is originally behind the cat (95 350). I thought i saw sims before, but then mine has the 3 wire so it may be different. I have very little backpressure as well, but my O2 still sends the correct signal. Have you hooked up a scanner to it (or volt meter) and gotten the exact mV being sent by the O2. Maybe that isnt your problem.
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