faulty temp gauge

[richi]

right my temp gauge does nothing apart from sit at the bottom of the gauge

i have change the gauge, checked the wire, crimped a new spade connector to the temp sender and changed the temp sender (the one under the cts) is there something i have missed, if i touch the spade connector to the exhaust manifold when it is warm the gauge shoots up so shows the gauge and cable are working and changed the temp sender twice thinking it might have been faulty when i bought a new one

this is what i bought

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=370093156781&ssPageName=STRK:MEWNX:IT#ht_1574wt_905

anything i have missed??????

[richi]

cant be something random like a fuse can it? didnt think it had one but might aswell ask

[mowgli]

well, it could be airlocked or the thermostat could be knackered.. what engine is it?

or the 2 senders you have tried could be faulty

[richi]

its a c20xe, bought 2 brand new senders so really dont think it would be 2 faulty ones, did read about air locks, but read that the c20xe bleeds itself? if not how do i make sure there is no airlocks? is there a way of testing if the thermostat is faulty?

[mowgli]

you can test a stat by lowering it into a pan of boiling water to see what it does, but just buy a new one, as its less trouble.

[Mieran]

No thermostat or its stuck open

[richi]

is the thermostat the one at the bottom of the rad on the left hand side as you are looking at the car?

[Mieran]

No its above the CTS and temperature gauge you just replaced

http://www.topbuzz.co.uk/info/cts/b011.jpg

http://www.max-boost.co.uk/max-boost/images/LET/fuelling_ignition_cooling/thermostats_cold_vs_std2.jpg

[richi]

+rep for help thanks, 1 last thing is there a way of telling if its knackered or should i just buy a new one thanks

[mowgli]

+rep for help thanks, 1 last thing is there a way of telling if its knackered or should i just buy a new one thanks

if the thermostat is open when it is cold, it is knackered.

new ones are less than a fiver.

[richi]

think i will change it anyways than thanks for the help