athens96ta

Just installed the 847 cam and the car keeps throwing codes P0134, P0135, and P0155 on both banks. The codes say something about H02S Insufficient Activity yada yada.... I did a WOT run and logged the sensor readings and they were all over the place; anywhere from 150mV up to 800mV. I am running front sensors only. The rears have been replaced with SIMS. Any ideas? I think the car is running rich. Could it be dumping too much fuel on the sensors? I had a new tune made but it isn't a dyno tune. The car runs really well but tends to "load up" a little at idle.

Thanks,

Loren

OffspringZ28

did you run it long without a tune? running that heavy of a cam for a good while without a tune could have possibly fouled your 02's

athens96ta

No, didn't run it at all without the tune.

aintno6

If yours is a 96 then you have 4 o2 sensors. 2 before 2 after cats.

So you take and put the o2 sims on the rear 02 sensors. Then get o2 exstenshions, and connect them to where to orignal front o2's. Then connect the 02 sesor, and screw the o2 in.

Check that you have that correct.