2006 Tacoma 1GR-FE Engine Swap

All of the O2 sensors?

 

Yes, those too.

 

The two A/F sensors and the O2 sensors? Sorry, just making sure I'm tracking?

 

Yes.

 

So with all four sensors disconnected, I received the errors after continuing to rev the engine to kept it going.

 

I can kind of see how those codes would be caused by the sensors.

Not sure how why the knock sensor circuit is “high”?

But who knows.

Not concerned with misfires.
I could see a misfire throw a knock code.
But not a circuit code.


More thinking to do here.

 

I'm sorry, I have nothing I can add here but now I'm invested. Bump!

 

so after reconnecting all of the sensors, and disconnecting the battery for 20 minutes or so, I’m now getting the following codes: P300, P303, P304.

 

Miss fire codes. Should be easy to check. OEM to replace if you hadn’t already. Maybe just a loose plug to them?

 

I swapped the #3 with #1 plug, the P303 code went away. I also inspected and cleaned all plugs. I’m gonna buy new plugs and see what happens.

 

Just posting to say good luck man. Everything here is well above me but I do know what it's like to have a truck not run and not figure out why. Keep at it I'm sure you'll get there with all the guys helping out. Then you'll have a running truck and know alot more about it.

 

This whole thing just keeps getting weirder. So you swapped the plugs and 303 went away?

What about 304?

 

I replaced all of the plugs and the codes are still coming up. Maybe I need to trace the wires for these. It is still shutting off. I am going to disconnect the battery and take a break. Maybe resetting the ECU will help.

 

No joy. Still getting P303 & 304 misfire on cylinders 3 & 4.

 

Double check, and make sure all of your sensors are plugged back together securely.

 

Connections are secure.

 

I swapped #4 & #6 coils and now I’m getting misfires on cylinders #5 & #6. Feel like I’m plying wack-a-mole.

 

When I swap coils to test them.
I like to switch them to the other bank (side) of the engine.

Swap #6 coil with #1.

 

Good advice sir! I’ll try it tomorrow.

 

The coils on the mid-2000 Fords were always going bad.
If you swapped coils on the same bank with 2 cylinder right beside each other, you could get a misfire on the cylinder beside it.
Even though the coil wasn't really bad.