can falty relays behind the fuse box cause temp fluxuations

thanks

can falty relays behind the fuse box cause temp fluxuations

thanks

 

As your aware there are two sensors at the front of the engine one for engine ecu ( yellow two pin) and one for the water temp gauge ( single pin)

 

The first one goes direct to the ecu witjh no interaction with the fuseboard etc., however I guess your refering to the dashboard gauge anyhow.

 

The gauge can fluctuate down and up when there is s poor connection at the sensor by this I mean from fully warmed up ( half way on gauge ) to cold as your getting internittent high readings then its not a bad connection at the gauge.

 

You could have a short to earth some where on the cable from the sensor to the gauge or an issue with the dashboard voltage regulator but this would cause the fuel gauge to rise up too when the temp gauge does ( have you noticed?)

 

An air lock or a faulty stat could be the cause but the problem would be there all of the tiime.

 

What you need to establish i it is a real or false reading, is the engine actually getting hot and maybe loosing water or is it a simple error reading caused by a wiring fault.

 

Try disconnecting the sensor and running briefly around the block and see if the gauge moves at all (it should not) if it does it proves its a wiring fault and a quick rewire will sort it ( from sensor to the back of the guage)

 

Bit of a ballache tracing intermittent faults but you should eventually get there.

 

Jeff TT

lee(jaikai)came down last weekend with conzult before the relay's were sorted the only eadings we got were the o2 sensors and engine temp...engine temp reached 106c befor we turned it off

the single pin sensor?(black next to yelow)was cleaned but since the relays were replaced the the temp gauge seems to have sorted itself out

im kinda afraid to run incase the thermostat is dodgy and baking the engine..hope that makes sence

106c is seriously hot mate, very worrying dude! should be about 78c I think, or something like that, but deffo not 106c...

i know thats why i was wondering if fryed relays could caus this

before the relays were replaced the temp gauge went to realy hot for about 10-15 secs then went back to normal.

im gona fit a new thermosatat next weekend..just wondering if fryed realys couls causs this

Edited April 22, 201114 yr by zhoodyx

that was the reading for the ecu? sounds liek a real overheating problem to me mate. is she dribbling any fluid when you turn her off? check the viscous, check the stat, the rad could have a flush and make sure you bleed it correctly aterwards dont want any air pockets building up. and the water pump is definatly pumping isnt it?

you want me to come over do another reading with conzult see if theres any differance ?

water pump is working theyrs no leaks what so ever

ill bleed the rad again the last time i done it it was not jacked up properlyng