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I guess what I am asking is for someone to look at the last post of the data from datamaster and determine if the sensors look right. Is the MAF working properly? I replaced the 02 sensors are they putting out the proper voltage? With the throttle open a little does the Lterm and Sterm look ok...

Hi Hib, Thanks for the reply. The EGR valve was recently replaced. The old valve was opening about 1/2 way. As far as I know the engine is stock no mods have been performed. The car ran perfectly when I bought it in 2003. In 2010 is when I noticed it was running rough so I did the minor tune up...

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...

Just a steady cruise about 70 Going up 280 no ping, coming back 280 all of the sudden ping.

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...