joshdoty23

so i have a 2000 z28 and i am having some major problems. i am throwing 9 dtc's. i dont have cats on my car and a cold air intake. so i am throwing the folowing:

1) P0102 Mass or Volume Air Flow Circuit Low Input
2) p0103 Mass or Volume Air Flow Circuit High Input
3) P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)
4) P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)
5) P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)
6) P0332 Knock Sensor 2 Circuit Low Input (Bank 2)
7) P0405 EGR Sensor Signal Low
8) P0420 Catalyst System Efficiency Below Threshold (Bank 1)
9) P0430 Catalyst System Efficiency Below Threshold (Bank 2)

it is sputtering super bad and bogging out on me. it wont go above 1800 rpms every so often and it chokes itself.... i am extremely stumped and font know what to do...

transamtom

Well your MAF may be bad(#1 and 2).

You need a tune to delete the rear o2's if you remove your cats(#3,4,8 & 9)

Do a search for Frost for the tune.

The KS's could be bad or the harness is bad (#4&5)

Now would be a good time to do an LS6 intake swap as you can change the KS's and harness while your in there.

The EGR can be tuned out as well and will need to be if you do the LS6 manifold so that looks after #7.