CTS

24th January 2013, 18:39

Right heres a quick query, start the car up from cold and itll idle around 1200 1300 rpm. let it get hot and it still idles around 1000rpm. unplug the cts while running revs shoot up and it goes into a default setting of running rich - thats fine. however when i plug the cTS back in the revs gradually sort themselves out to idle at 800/900 which is a bit more like it. Anyone else found this with their coolant temperature sensor? I would change it but it means opening the cooling system up and if it's not necessary then I won't do it

24th January 2013, 19:27

Are you running an oem cts(ie a genuine one from citroen)I ask because non oem cts run at different values which may account for your problem.

24th January 2013, 19:36

It looks original but the plug is light blue, all oem ones I've seen are green with a yellow band. However this is an s2 rallye engine so not sure if its standard

24th January 2013, 19:58

Has anyone else got a light blue one in their mk1/blacktop? Bare in mind its not the one for the dash gauge which is light blue as thats a different size thread and much fatter

24th January 2013, 20:03

I`ve got the same engine as you mate & mine uses a green cts with a 19mm thread.

24th January 2013, 20:04

I'll have a check on mine in a minute mate as mines a Mk1 blacktop, i'm sure mines got a light green and a light blue one near thermostat housing, will re-post in 5 minutes after ive had a gander for you buddy.

24th January 2013, 20:08

That's mine. But grubby but definitely blue

24th January 2013, 20:09

Quote:

Originally Posted by stevo67

I`ve got the same engine as you mate & mine uses a green cts with a 19mm thread.

You run as s2 rallye engine as well?

24th January 2013, 20:18

Mines definitely got a light blue one mate and mines a mk1 blacktop

24th January 2013, 20:28

Quote:

Originally Posted by Gandi699

You run as s2 rallye engine as well?

No mate standard mk1 black top,everything oem.

24th January 2013, 20:29

got a picture? so you should have two light blues one for the gauge further back and the one in my picture above

24th January 2013, 20:36

Quote:

Originally Posted by Gandi699

got a picture? so you should have two light blues one for the gauge further back and the one in my picture above

i`ll try & get 1 tomorrow for you mate.

24th January 2013, 20:44

Sorry I meant the other guy with the blue sensor

24th January 2013, 21:12

Heres mine, ones a very light blue with a green connector and the other is a darker blue with a blue connetor, ignore the oil i did the headgasket before the snow set in and never got round to cleaning it up -.-

24th January 2013, 21:14

Like identical to my setup. Cheers mate, just out of interest - not sure if you've ever done this, but if you remove the gauge sensor (the one on the right) did water come out of the coolant channel?

24th January 2013, 21:18

Ive never had it out myself, i'd imagine so with it been in the water jacket in head, its only a separate sensor for gauge

24th January 2013, 21:20

If you ever do let me know, mine doesnt go into a coolant channel but I dont think the rallye heads like mine put that sensor in a coolant channel

24th January 2013, 21:26

Yeah i will do, i'll give it a try tomorrow as ive got to bleed cooling system up again after changing thermostat and not had chance because of weather :L

24th January 2013, 21:28

if you would that'd be great. I think there are too designs of coolant channels in various heads

24th January 2013, 22:53

No worries mate, glad i could/can help

Will repost tomorrow after tea-time and let ya know

24th January 2013, 23:08

thanks pal

25th January 2013, 18:11

20 quid the local motorfactors wanted for a non genuine one! Fook that