95 GST Trouble Code/ CEL Help

[Boostinsideways]

I am running a 95 With the stock ecu, full emissions delete, rear o2 delete. All this was done by the previous owner but I recently started seeing a few issues so I trying to trouble shoot.

Here are all my codes. I have remedied a few of them.

P0141 - Rear o2 deleted (No fix atm)
P0120 - TPS Circuit (New TPS ordered)
P0325 - Knock Sensor circuit (Not sure on this one. Knock sensor is plugged in. do these go bad?)
P0105 - Fuel Pressure Solenoid (Disconnected trying to find the plug and plug it back in)

These have me a bit lost.
P0100 - Volume Air Flow Circuit (No idea MAF problem?)
P0110 - Intake Air Temp Circuit (DSMs don't have an IAT Sensor ???)
P0202 - Injector #2 Circuit (Not sure how to test this, what to trouble shoot or replace)

Car is currently running a bit rich and has a rough idle.

 

[DSMxJB]

P0420 Error Code: Catalyst System Efficiency Below Threshold (Bank 1)

Sorry to hijack your thread but I see you're asking about CEL codes and I have this one so I thought someone could answer mine too so I don't go making another thread.

I want to know if this is the front or rear o2 sensor. I'm running no cat and the shop told me that is why but bank 1 confused me and you're getting P0141 for your rear o2.

 

[Boostinsideways]

There is just 1 bank of sensors in our cars. But there is a front and rear. If your showing the cat code it is because you deleted the cat and still have the rear o2 in place. I believe there is a fix for it on the vfaq site.

Edit:

Yes here you go. http://www.vfaq.com/mods/O2bypass.html This will trick the ecu into thinking the rear o2 sensor is fuctioning. I had planned to do it in my car and use the rear bung for my WBo2 but the wires are not there for me to do anything with. Still have not fabbed up a test pipe to delete the cat so I am not running the WBo2 yet.

 

[DSMxJB]

There is just 1 bank of sensors in our cars. But there is a front and rear. If your showing the cat code it is because you deleted the cat and still have the rear o2 in place. I believe there is a fix for it on the vfaq site.

Edit:

Yes here you go. O2 sensor bypass This will trick the ecu into thinking the rear o2 sensor is fuctioning. I had planned to do it in my car and use the rear bung for my WBo2 but the wires are not there for me to do anything with. Still have not fabbed up a test pipe to delete the cat so I am not running the WBo2 yet.

Awesome, thank you very much. It just confused me because I ran without a cat for a very long time before I got a code and didn't know what "Bank 1" meant and assumed my front o2 was bad.

 

[Boostinsideways]

Bank 1 and Bank 2 is generally used on v-engines. Cars that would have 2 heads, so 2 headers, so 1 o2 sensor in each, and sometimes 2 down stream o2 sensors.

And bump for hoping someone has information to help me out.

 

[Boostinsideways]

Okay as far as I can tell both P0100 and P0110 are MAF codes. I cleared them and they have not come back yet.

Still throwing the p0202 code but all my injectors are reading 2.8 ohms of resistance. I even checked a spare set I had and they all read 2.8 so what gives? Loose connector maybe? Could it be something else? I cleaned all the connectors and replugged them. Cleared that code and haven't driven since.

 

[Boostinsideways]

Bump. Any input/thoughts appreciated. Its been 2 days and all that has happened is I have helped someone else fix their problem.