Originally Posted by
JDMtoDeath
Update:
Corrected timing and removed balance shaft belt. It runs ALOT better, but now won't stay running and bogs down/backfires when you step on the gas hard (chipped P28 ECU). I unhooked the neg. terminal and pulled the HAZARD fuse, switched back to the PT3 ECU and it ran alot better almost perfect, still backfires when you step on the gas hard but no bogging. Then the CEL came on.. #41 Oxygen Sensor Heater, and it runs horrible again bogging down won't stay running... i've heard the oxygen sensor heater will cause your car to run bad when it fails.. any ideas? Im soo close.
Yes, if you have an O2 heater problem then you'll run badly, the oxygen sensor needs the heater to maintain the correct sensor element temp.
Backfiring is often a timing problem, but an O2 sensor failure can cause the same problems because the ECU will be getting bad information (from the O2 sensor) and will not be using the right fuel and ignition parameters. So yes, it can make it backfire and/or stumble.
You're not getting any more codes other than those two?
You might need a new O2 sensor or you may just have a wiring problem, and since it's a engine swap I'd look at the wiring first. Also look at the wiring for the VTEC solenoid, because that may explain the other CEL.
Unplug the connectors at the ECU, and unplug the connector on the O2 sensor, and and check continuity of the heater wire between the two plugs using a multimeter. All you're looking for is that the connection is roughly zero ohms, which means it's good. You can find an ECU pinout via Google if you need. Also check that the O2 sensor connector is getting 12V when the key is on (make sure the ECU is plugged in also).
The heater element gets 12V on one side, and the ECU switches the other side of the heater element to ground, completing the circuit. So you're checking that you have a good connection to the ECU, and that you have power to the O2 sensor. If both of those things check out OK, you may need a new O2 sensor or a new ECU, and O2 sensors fail much more often than ECU (unless something is wired wrong and has damaged the ECU).
With the way it runs on the P13 and the corrected timing, it sounds like run of the mill O2 sensor problems.
When you did whatever work on the car, did you remove the engine? The battery drain is slightly suspicious, and I'm still thinking there is a wiring problem somewhere.