Need help asap please o2 sensors
10-24-2009, 12:30 AM
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Need help asap please o2 sensors I got my car tuned last weekend and my tuner said I had a bad passenger side o2 sensor. I only have the front sensors turned on because I have long tubes with no cats. The one that went bad was a factory o2 and I had a aftermarket Bosch in the drives side. I bought a new Bosch to replace the bad one and I had a year warrantee on the other Bosch in the drivers side so I got a free replacement for that one as well so I would have two completly new sensors. I was letting the car idle for about 5 minutes today and when I went to give it a little gas to let the clutch out it acted like it was trying to break up or something. I gave it a ton of gas to clear it up and once I got going it drove fine. It drives fine while leaving a stop light after idleing for a few. It just does this when I first start it up. It drove completly perfect untill I changed these o2 sensors (even with the bad one) and never did this. I heard these sensors arent the best but they should work I would think. Can those two sensors be really throwing the tune off that bad? Should I go get two more replacements? I was supposed to go to the dyno in the morning but am very hessitant now with this problem. Can someone please help!?!?!!?
10-24-2009, 10:50 AM
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Do a search here for how to reset the ecm. I had a the same issue and had to have the ecm relearn everything. It will clear code and allow the car top relearn the O2 sensors. You can try that.
10-24-2009, 10:57 AM
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10-24-2009, 11:02 AM
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As soon as I put them in I ran up to auto zone and got the codes erased. Is this the same thing as reseting the pcm?
Doing a reset on the pcm won't effect the tune will it?
10-24-2009, 10:54 PM
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It shouldn't. When you get a tune it changes all the parameters that the computer uses to control things. Resetting the pcm makes it do all of the initial checks for various systems in your car (i.e., misfire monitor checks, emissions systems checks etc.) Basically, resetting your pcm will only make it touch base with every system in your car.
