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Hi, I have a 94 coup that pings at low RPM and closed loop. Open loop seams to be fine. This all happened after I replaced the plugs, wires and fuel filter. Since then I have replaced the o2 sensors and the EGR valve (olny opening half way) I still have the same issue. I decided to datalog a...

Hi, My first vette and it started to run rough hesitate. I replaced the plugs and wires and wala vette runs great. I took it out today and ran it on the freeway going up 280 runs fine (about 10 miles) I pull off to make a run back, I was in sixth gear (six speed) about 70 MPH just like the run...