I have been getting my TII back on the road (stock motor, rtek1.7, emissions removed) and I have a bucking issue. The car runs fine and accelerates great when not extremely warm, but after 10mins or so on a curvy road it starts to miss/buck under load.

~7psi , under normal accel the wideband reads ~11.5 and when the buck comes is jumps to ~13. Timing was just setup to stock, nothing crazy.


The one problem I do know about is the O2 for the computer is not plugged in - but is the car using this under load? IE:closed loop?

Any help here?

 

The 02 sensor is not used under most conditions. At full throttle, you're in open loop. Because it seems to be temperature related, I would start with checking the water temp sensor. Pull trouble codes, and test the sensor at the ECU/check the connector.

 

I will check it, what output to the ECU from the water temp sensor would affect timing or fuel other than coming off of cold start?

thanks,

 

Engine temp/water temp is used to calculate fuel delivery. Check the output per the FSM fuel and emissions section.