engine fan not coming on

[Dooie Pop Pop]

iirc the fan is switched on by the ecu, is this correct? iv sourced a new sensor from mjp which despite being blue and not red he assures me is the right part.

the fan works fine when run off the battery so thats ok i was just wondering if there' s anything else i should look for that could stop ithe fan coming on?

did a little searchy and found this thread with a pic link half way down

http://bb.gtiroc.com/viewtopic.php?t=38913&start=0&postdays=0&postorder=asc&highlight=

would i be right in thinking that sensors just by the powersteering pipe under the intake on the ds side of the engine? it looks like a job for Mr Tickle :lol: :roll:

also the sensor comes with a copper washer, would it be a good idea to stick a little sealent on the thread?

cheers, Stu

 

[OZ-Racing]

i was just wondering if there' s anything else i should look for that could stop ithe fan coming on?

A cold engine :? :lol: :lol:

No need for sealant on the thread. The copper washer will seal it nicely. Your sump plug has a copper washer for a seal.

At work we use copper washers to seal up to 600 bar, so I don't think you'll have any probs

 

[paz]

i was just wondering if there' s anything else i should look for that could stop ithe fan coming on?

A cold engine :? :lol: :lol:

PMSL.

Paz

 

[Dooie Pop Pop]

[
A cold engine :? :lol: :lol:

:

LOL :roll:

Mike at mjp (did you see his 350z in Jtuner?) keeps these sensors in stock as they are a common problem.

Stu

 

[Fast Guy]

Put your aircon on if you still have it and see if the fans come on. If the sensor is ok, then at a guess either the ecu has a problem or the wire has a break somewhere.

 

[Odin]

I have the same problem with mine as well mate, I just changed back to the standard fan to see if that fixes the problem, But its not got warm enough for the fan to come on yet lol. No matter how hard I've driven it :? .

Maybe I should go and sit in the Mcdonalds Que again that's what made me notice that it wasn't working in the first place.



Rob

 

[ChrisS]

Have you checked the fuse is ok by any chance?

 

[OZ-Racing]

I should go and sit in the Mcdonalds Que again that's what made me notice that it wasn't working in the first place.

Is that because it took them soooooo long to make your huge order :shock: :?: I'm surprised you didn't run out of fuel :lol:

 

[Odin]

I should go and sit in the Mcdonalds Que again that's what made me notice that it wasn't working in the first place.

Is that because it took them soooooo long to make your huge order :shock: :?: I'm surprised you didn't run out of fuel :lol:

Nice to see someone didn't let me down , I thought that someone would of picked that up a little quicker to be honest :roll: :lol: .

Its a good job I've got a big oil cooler otherwise it would of been a gonna .


Rob

 

[Dooie Pop Pop]

Its a good job I've got a big oil cooler otherwise it would of been a gonna .


Rob

me too :lol:

Have you checked the fuse is ok by any chance?

which fuse? the one under the bonnet by the ps wing?

Put your aircon on if you still have it and see if the fans come on. If the sensor is ok, then at a guess either the ecu has a problem or the wire has a break somewhere.

Aircon? pmsl :lol: no it was the first thing i ripped out :roll:

cheers for the help, Stu

 

[Dooie Pop Pop]

should also add my tickover is too high and only settles now and again rarely. previously its been as good as gold @ 850rpm

i was under the impression that this is because the sensors playing up and sending in too much fuel thinking the engines cold still...hence no fans


Stu

 

[ChrisS]

which fuse? the one under the bonnet by the ps wing?

Thats the one. I had a problem with my fans i spent ages trying to solve and found the fuse had gone. Its worth a try.

 

[Gray]

Plug it in

 

[Dooie Pop Pop]

huge thanks to Shaun for the pm.

anyone even considering removing that coolant sensor should go out and buy a deep 19mm 3/8 socket, dont even bother with a 1/2 inch drive because it really will make you want to :evil: it with a hammer :lol:

 

[Moderator]

still not fixed :evil: iv changed the sensor, swapped the fan relay with the ac one and also swapped the fuse in the ps wing...............



my fan is still not coming on! :evil: :evil: :evil: :evil:

has anyone else had this problem? i tries an ecu check tonight but for some reaon it refused to work! :-? the ecu light stayed on and refused point blank to blink. wtf is going on? is my ecu dead?

pod in 2 weeks i have to get this fixed!

pulling my hair out, HEEEEEEEEEELP!!!

Stu

 

[Dooie Pop Pop]

should add engine seems to run fine but prevously to changing the temp sensor the tickover had got really erratic.

should i reset the ecu? i still cant get the ecu check light thing to work

 

[Fast Guy]

Maybe it's a wiring problem or an ecu problem. The fan is earthed by the ecu to switch them on as far as I know. Are you sure the engine is getting hot enough for them to need to come on?

 

[Dooie Pop Pop]

the water temp gauge has never gone much above 1/3 previously thats driving or static. iv waited till its nearly 2/3 up and the oils over 90 before iv switched it off as i dont want to damage it iv refilled the rad at least 5 or 6 times and its always come on .

should add V had exaclty the same problem but he' s running a motec ecu...confusing :lol:

 

[geoff pine]

had this problem fans not coming on found the thermostat was stuck open.

 

[Dooie Pop Pop]

i wish it was that simple Geoff