Power Fc Displaying 150 Degree Water Temp

[W0rp3D]

just replaced all the water hoses under the inlet manifold, i took the manifold off to make it easier, after putting it all back together i couldnt start it, realised that i had forgotten to plug in the air meter under the manifold, eventually i got it started (took a while tho) untill i got it started the power fc would not display a temp at all but once started it constantly displays 150 temp, the dash gauge sits on half once warmed (where it nomally sits), i also tried removing the temp sensor plugs (3 of them, i think there all temp) one of them would kill the dash gauge but none of them would change the power fc, since i have had it running it feels very doughy and breaks down a bit up top, im assuming that is due to the temp reading and the power fc changing the map to compensate for the high temp reading.

Any one else have this problem or have any idea how to fix it?

[JonnoHR31]

sounds like its earthing out somewhere. check the plug and wiring. also check the 2 earth points that bolt down next to the 2 temp senders.

power fc will be pulling timing and adding fuel if its reading 150, which might be the cause of your breakdown

[SargeRX8]

It pulls timing above 90 or 100I can't remember but yeah sounds like its either grounded or shorted out internally returning max voltage/temperature. Unplug the temp sensor see if it drops to 0 or throws an error. If you got the commander check the voltage of wtrt on sensor page. If you have fc edit raise the threshold for timing cut to 151c until you get it fixed and see if that fixes the power loss.

[W0rp3D]

No change when I disconnect the temp sensor, the hand controller does not show am error and from memory the voltage is 0.08.

I don't have any thing to connect it to a lap top, can I raise the threshold via the hand controller?

I will clean the earths when I get home and see if the helps, hopefully its some thing simple like that.

[89CAL]

Is your sensor broken perhaps? Sounds like its not getting voltage through the sensor or it has a short to ground

[W0rp3D]

Im assuming that it uses the same sensor as the dash, the gauge on the dash is working fine and goes to zero when I unplug it but nothing changes on the power fc

[W0rp3D]

Found out what the problem was, I had 2 of the plugs in the wrong spot, but now it reads around -30 and wont start, wouldn't start today with it still reading 150 took a lot of cracking yesterday to get it going (flattened the battery then used jumper leads to another car), I have another sensor here off another motor but it has a different plug on it and i don't have the loom to suit it

[W0rp3D]

Next question is what is most likely to be f**ked (both were working fine before this) sensor or ecu...........

[89CAL]

So the pfc started showing -30 degrees? What is your voltage in sensor check now?

[W0rp3D]

I got it running earlier and got the temp up to -4 it now says -11 and the voltage is 4.48

[89CAL]

Seems way to high. Something is defenatly not right somewhere between the sensor and ecu i know the signal for the speedo splits in two at some point cause the wire was cut to my ecu and my power fc showed 0km/h but my dash speed worked fine, so maybe the water temp does something similar and thats why your gauge works

Can you pull the sensor out and stick it in a container of boiling water to see what readings you get? Not sure what amount of coolant will come out or if you have some spare to top it up though

[JonnoHR31]

gauge and ecu have completely seperate sensors and wiring. the smaller sensor with the slip on single wire is for the dash. the larger sensor with the 2 pin plug is for the ecu.

off topic but the speedo sender is hooked up to the speedo which then has an output wire that goes to the ecu

[SargeRX8]

gauge and ecu have completely seperate sensors and wiring. the smaller sensor with the slip on single wire is for the dash. the larger sensor with the 2 pin plug is for the ecu.

This. I think its red. Last I recall my voltage was 2.4v. Sensor is about 60, very common they fail with this age.

[JonnoHR31]

theres red, yellow and blue. red and yellow are the 2 different original senders for different models and the blue is the newer universal replacement

[W0rp3D]

Got a new sensor today, seems to work but I think it reads a little high, my original sensor was red/marone and was rectangle, the one on the other motor had an arc on one side and the rest was more rounded as well but it was the same color as the other, ill get some pics tomorrow.

Thanks to every one for there input, greatly appreciated.