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Really Hot Inside The Car

Jap_Muscle

By Jap_Muscle,
in Engines & Forced Induction

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Jap_Muscle Mentor

Jap_Muscle

Posted
Posted

hey guys, ill try to keep this short.

Basically i recently got my car back after a big build (rb26/30, gt35r, top mount, ect ect)

and ive noticed how hot it gets when im driving the car.....i realised that theres alot of heat comming from under the dash (where the pedals are) and the air con vents. I assumed it was because of the heat the engine was producing. i also had alot of issues with the water temp hitting 110c sometimes.

so i spent a good amount of money ceramic coating the entire exhaust side. Including manifold, turbo housing, dump pipe ect. the only thign i didnt coat was the wastegate (hard stuff to coat without dismatling the thing). I even bought a new Koyo Radiator to help with water temps.

But nothing changed.....i feel like its gotten hotter.

The only thing i can think of is that i am currently using a screamer pipe....but it never was an issue before the build, then again i wasnt running a bit top mount.

have you guys got any ideas?

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Jap_Muscle Mentor

Jap_Muscle

Posted
  • Author
Posted (edited)
climate control is stuck on heat, common issue.

to test see if ur aircon works properly.. or atleast try get it to blow cold air thru it then see if it gets hot.

well now that you mention it the AC isnt working....i never knew it was linked.

would it still be stuck on heat even if the AC control is off? or using different settings?

if it is indeed stuck on heat...how does one fix this? i suspect it has something to do with the Wiring into the ECU? (im using a PFC)

Edited by Jap_Muscle
BundyBear Rising Star

BundyBear

Posted
Posted (edited)
well now that you mention it the AC isnt working....i never knew it was linked.

would it still be stuck on heat even if the AC control is off? or using different settings?

if it is indeed stuck on heat...how does one fix this? i suspect it has something to do with the Wiring into the ECU? (im using a PFC)

Given you just had work done done on the car I'd say the ambient sensor is unpluged ( it should be the little black lump next to the horns, behind front bumper).

Like GTScotT said its a common thing, mechanic forgets sensor, A/C thinks the outside temp is -40C or something and fires up the heater 4 ya

There are 2 other sensors, one at the back of the dash ,left side (sunLoad) and one just to the left of the steering columb (interior temp).

Any of these left unpluged/faulty will screw up ya AirCon (usually with the heat your gettn)

Cheers

EDIT: Water temp hitting 110C sounds like a seperate issue, I THINK this is a common issue 4 workd motors (I'd sujest you search SAU 4 this one, I've seen a few good posts covering this)

Edited by BundyBear
stenve Proficient

stenve

Posted
Posted

had this happen to me once. felt hot air coming through vents etc.

watched the oil and water temps but nothing unusual. i thought something was f**ked.

Turned out i'd bumped the air con control and set it to 30 something degrees so hot air was coming through the vents even though the air con control was off :S was quite weird

jrm Veteran

jrm

Posted
Posted
Im not sure about the 34 but i know with the 33 that if the climate control is on 18, 30 what ever, it will lightly blow that temp even if it's turned off.

Can confirm that for my R34 is the same - I was surprised when I noticed :P

Jap_Muscle Mentor

Jap_Muscle

Posted
  • Author
Posted (edited)
Im not sure about the 34 but i know with the 33 that if the climate control is on 18, 30 what ever, it will lightly blow that temp even if it's turned off.

it does indeed do this, but ive always had it set to 18c on the board....turned on or off it blows hot air.

ill check all the sensors...hopefully they all working

Edited by Jap_Muscle
GTScotT Grand Master

GTScotT

Posted
Posted

definitely stuck on heat then mate, even with the ambient sensor unpluged you should be able to turn it back down each time you drive.

ull have to go thru the whole system and check everything, heater tap, plugs etc

BundyBear Rising Star

BundyBear

Posted
Posted (edited)

hit the recirculate button (inside air ) to stop the blowing with the aircons off, the cowl vent door gets left open

its been said B4 but, the designer of the A/C should be shot

cheers

EDIT: Some 'Console' programs can diagnose the aircon, might be worth a shot if ya got access to one

Edited by BundyBear
Birds Grand Master

Birds

Posted
Posted

Remember that it's an electronic computer and not a manual switch, quite easy for something to fail electronically and the signal not make it to the solenoid. I agree with everyone else, heater stuck on...

400kw Collaborator

400kw

Posted
Posted

hey mate ,do you run themo fans on your set up ??as i have a twin turbo rb 30 /25 set up running 488 rwkw and i was running themo fans and driven around wasnt to bad but i soon as i got a red light or went through a drive through temps would clim ..up ..i pulled the themos off and put the standed fan back on ,and didnt have any more troubles with the temp climming.

cheers

joeyjoejoejuniorshabadoo Grand Master

joeyjoejoejuniorshabadoo

Posted
Posted

there is a sensor that is prone to breaking, its near the windscreen on the inside above the glove box.

when it goes you basically have 2 settings.... 18 (cold) and everything else (hot)

you need to turn it to 18 and then turn it off to get it to stop blowing hot air :ph34r:

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