My 4x4 cossie started running very rich the other week so after testing the ecu plug voltages I found the tps is at 11.4 volts!! Apparently should be 0.5v closed throttle and 4.5v open throttle. Tried unplugging sensor still the same. What's happened here lol?

 

I would try a new tps to start with

I may have a spare one if you want to try for diagnostic purposes?

 

I tried plugging a spare one in still the same. Even with no sensor connected it was still 11.4 volts

 

Give msd a call if you are on l8 or similar

 

check the tps wiring for a short to the live wire on injectors or iscv, hopefully you have an issue there. Otherwise the ecu's output of 5v is fried....

 

Tried phoning msd but James is off til Monday. I'll have a look at the other wires

 

I have seen this before your amal.valve or iscv is shorting out onto the tps wiring Strip back and check.