Sunday I finally started my LS/VTEC build and it started right up but I have 2 code, Code 9 which is the NO. 1 cylinder position sensor so I read my books and its says to replace the Distributor so I did with a friend of mines and the code still appeared. Now for the code 41 which is the Oxengen sensor I changed my old one for a new one the code went off, I started the motor up 30 minutes later and the cade reappeared can someone help me out. These code are still pressent after unplugging the battery thanks guys please help me 91 EF converted to OBD1

 

You switched to a 4-wire O2 right?

 

yes i did and i have tried to good 0s sensors

 

double check your wiring and your grounds

 

I am having the same problem. I have a 93 civic coupe with a b20 and I am getthing codes 41 and 43. I have changed everything. Fuel pump, fuel filter, fuel injectors, fuel rail, fuel regulator, plugs, plug wires, o2 sensor, computer, and reset the battery and its still throwing CEL and bogs down BAD when CEL comes on. What would you recommend? I have never had any problem like this before. Please help....