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Hi i recently bought a Series 1 R33 skyline and for some reason the middle vents in the dash do not push out any air yet the side ones next to steering wheel and passenger sides work Its just the 2 above the climate control and cd player.

Where do i trace to find out if the hose is not plugged in? Would i need to strip out the dash or?

Thanks

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Somewhere around here is a tutorial or 2 about taking apart your dash, those might be a good place if you do need to dig deeper.

Otherwise, first check is to take off the vents themselves and have a look if there is anything obvious blocking it. The dash piece is one huge piece that goes from just above your ash tray, up around your climate control then across your cluster to the other side of your steering wheel. It can be rather annoying to take off some times, but again, find a tutorial and it will help.

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yep. so basically keep digging deeper into the system till you find the cause.

Id say it has something to do with the electric system that swaps the blowers from body to feet etc. Often these systems get the skyline 'click click' going on which is the gearing wearing out but it sounds like yours has gone to the next level...

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I guess ill take it down to a mechanics because i almost snapped the main dash piece fiddling around trying to work out the vents haha.

but yea the sides and feet seem to work fine so i have no idea. >_<

Could it be the Climate Control system? because the off and auto buttons were broken so i ripped it out when i was checking the vents and just shoved some nailed in the holes for the time being until i buy a new unit.

Made no difference with the centre vents though.

Also the car only has 80,000km's so it surely couldn't have worn out after that long?

Edited by corpse.
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those buttons are actually really easy to fix (did it on mine).

otherwise its impossible to say how long those cogs/buttons will last. Tho if your buttons are already mashed then that a good indication on how much work the vent cogs have had...

good luck on the cost and 'soft hand' a mechanic will use on it. Id say keep at it yourself... also search through the maintenence section as im sure this has happened to somebody else before...

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I'm pretty sure the vents all open up from a unit in the middle of the dash just above the floor. All the pipes come from there. Whilst you're sorting out why they don't wok it might also make sense to grab some sticky backeed foam stuff to replace any seals that may have perished over time.

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ok bit of an update. bought a new climate control unit, didnt fix this pulsing sound.

ran the diagnostics test and came up with no error codes?

i can turn off the whole climate control system and when the cars running the noise is still there? The noise just doesn't go away no matter how long to drive lol.

Any ideas?

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yeah mate it is likely to be this

http://www.skylinesaustralia.com/forums/topic/206019-annoying-clicking-noise/page__hl__Aircon+clicking

years ago when i had a 33 that did this i was looking at getting in there and fixing it and found another tutorial on how to get to that servo motor that causes the clicking/pulsing without taking the dash-pad off but im not going to spend 30mins searching for it- thats your job. I remember the tutorial had a step by step guide on how to DIY fix-it with pictures with it too. You'll know the one when you find it cos the guy stabbed himself in the finger with a screwdriver in the job and had to get stitches (photo for that too) so youll know the one when you find it.

good luck.

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  • 4 weeks later...

Its part of the internal air temp sensor. I know with the sensor unplugged, you will get hot air from the A/C on anything but 18 Degrees. This is because it doesnt know the internal temperature and cant adjust to suit.

make sure the hose and plug are connected to there counterparts on the dash panel that you have pulled off atm

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i think it has to do with the heater not blowing heat. that can wait since summers coming haha.

in diagnostics mode u can hear the vent trying to open but it just doesnt want to open.... is there any way i can forcefully open the middle vents without having to rip open the whole dash?

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  • 13 years later...

I know its been 13 years since this topic, but it came up when i was searching to fix my problem so thought i would add my 2cents in and how i fixed my issue. 

my r33 had air coming out off all the vents except the center one. i went straight down the rabbit hole expecting it to be a mechanical issue, pulled the dash apart tracing lines, checking linkages etc. it turned out the very fine fly screen mesh behind the center vent was actually VERY blocked so when i had the air on face the air would take the path of least resistance and come out the 2 side vents but allow nothing out the center vent.

a quick clean fixed the issue. once the mesh is clean you can see the air direction flaps moving inside through the mesh. 

  • Like 2
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