Elise SC owners please read this
Discussion
kevin ritson said:
That's not nice to experience...
Do you know if the SC uses a different 'stat to the other 'yota cars? Don't want to cause panic (although if I had a new S, R or Exige I'd be thinking of giving the dealer a bell just to make sure) but I wonder if they use one that opens at a lower temp to compensate for increased inlet air temps?
I don't know what rated stat came out, (it was done under cover of darkness!...) but the one that has now replaced it is 82 degrees.Do you know if the SC uses a different 'stat to the other 'yota cars? Don't want to cause panic (although if I had a new S, R or Exige I'd be thinking of giving the dealer a bell just to make sure) but I wonder if they use one that opens at a lower temp to compensate for increased inlet air temps?
I don't know if the cutting out problem would affect the S because I am not sure if it has two rev limits. ( ??? )
Fidgits said:
wow...
On my 111R I notice sometimes if i press on the temperature can drop even after its warmed up.. though i dont think it is the same problem?
I've had 3 'R' s - they've all dropped to about 84 or 85 when you first give them some beans, especially when there is a low ambient temperature. They've also all recovered pretty quickly to 89 or higher immediately afterwards.On my 111R I notice sometimes if i press on the temperature can drop even after its warmed up.. though i dont think it is the same problem?
Gallandro said:
I dont understand
why dosnt the ECU get info from the real engine temperature?
the stat only measures the water temperature.
i have a 74 degree stat so when pressing on have no temperature reading at all.
just seems weird
<snip>why dosnt the ECU get info from the real engine temperature?
the stat only measures the water temperature.
i have a 74 degree stat so when pressing on have no temperature reading at all.
just seems weird
As this matter is now sub judice i have been advised to remove this post.
Dave
Edited by Happy Dave on Monday 28th April 00:07
purpleperil said:
I think the ecu will be using the same feedback 'channel' as it does to display the engine temeprature on the stack. I must admit when the other SC (lady) owner posted on here or Seloc that her temps were dropping into the 70's I thought it was a bit odd! My (albeit not Lotus fitted) SC does not drop much below 90 even when 'making good progress' on a cold day 
<snip>As this matter is now sub judice i have been advised to remove this post.
Dave
Edited by Happy Dave on Monday 28th April 00:08
Gooby said:
This is an old problem. Early generation 111R's have (had) this problem. I am suffering the same problem at the moment and a diligent member of the work shop staff found it refered to (fix and all) in a Lotus technical bulletin. Funnily enough, untill that point lotus were denying all knowledge of the fault.
We had tried it all to solve the problem even to the point of a new ECU...
<snip>We had tried it all to solve the problem even to the point of a new ECU...
As this matter is now sub judice i have been advised to remove this post.
Dave
Edited by Happy Dave on Monday 28th April 00:05
Craig! said:
My Exige S gets up to the 86 mark then starts to drop down to 76/77/78 depending on the speed I'm traveling at... I thought it was normal just because of the higher flow of air through the radiator. Is this normal? Or should they get to 86 and stay there??
When I can next drive the car I'll monitor it closely, but I do know the temp does vary some what never seen it stay at a fixed temp like some of my previous car's (all german).
The car's an August 2007 build.
When I can next drive the car I'll monitor it closely, but I do know the temp does vary some what never seen it stay at a fixed temp like some of my previous car's (all german).
The car's an August 2007 build.
The thing is, until last week I hadn't really paid a great deal of attention to the temperature at all, certainly not with it dropping low! as soon as you're on the 2nd cam (particularly in a S/C car) the last thing to be doing is reading the bloody temperature readout. 76/77/78 seems a tad low to me.
gdr said:
No way induction air will cool the water temp rapidly to this extent, 2 cams or not. I've just noticed the same sudden temp drop with my new Exige PP (first time it was ever revved past 6000 rpm in fact) where temp dropped into the 70s from 88 before recovering. I also suspected dodgy thermostat and I think this is backed up by HappyDave's experience - will get dealer to sort out. As stated, this is dangerous because if water temp drops below warm up threshold, ECU will cut engine above 6000 rpm, not good if overtaking, mid corner etc. Also, sudden temp fluctuations are definitely not good for the engine.
I suspect cause is this - under low engine load, thermostat only slightly opens to limit flow through rad hence keeping engine at correct temp. If you suddenly boot it, seems to me thermostat is opening too quickly (pressure related maybe?) and a load of cool water from the radiator is suddenly dumped into the engine, hence resulting in the sudden temp drop. Of course after a while everything will equalise and temperatures recover. Not sure of details of the cooling system on Toyota, so maybe this is simplistic, but for sure not right. My previous Exige (n/a Toyota) never did this and ran pretty stable temperatures around 86/87 creeping up slowly only in traffic or under extreme track use.
<snip>I suspect cause is this - under low engine load, thermostat only slightly opens to limit flow through rad hence keeping engine at correct temp. If you suddenly boot it, seems to me thermostat is opening too quickly (pressure related maybe?) and a load of cool water from the radiator is suddenly dumped into the engine, hence resulting in the sudden temp drop. Of course after a while everything will equalise and temperatures recover. Not sure of details of the cooling system on Toyota, so maybe this is simplistic, but for sure not right. My previous Exige (n/a Toyota) never did this and ran pretty stable temperatures around 86/87 creeping up slowly only in traffic or under extreme track use.
As this matter is now sub judice i have been advised to remove this post.
Dave
Edited by Happy Dave on Monday 28th April 00:06
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