i have a 88 nissan 300zx non turbo 2+2, this is my first summer with my new z.now i dont know if this is a common problem with these things but it seems like the heater on this car is always on. i mean i could be driving 90 mph down the jersey turnpike with the t tops off in 70 degree weather and im still breaking sweats. no i've never diagnosed orhad to repair any hetating problems on any car, so before i start ripping the dash apart guessing for problems i will hope that someone else ha had the same problem and has some suggestions. im having a hard enough time keeping the engine cool i really dont want to have to spend too much tome on the heater too.
thanx in advanced
p.s the car has digital controls for the a/c and heater, and when i do turn the heater on it only blows through the defrost vents.
ur doing 90 and prolly have a vacum leak, hence the heat
try driving slowly with less throttle
and yes the heater blows though the defrost vents thats how its set up
No no no......
You've got a vaccume leak... That is true.. But won't be fixed by driving slower.. The heater is set up to default to the defrost and always be on a bit for some reason... Check the vaccume lines running to and from the heater. One is likely broken.
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1987 300ZX Turbo, 5 Speed, TurboXS H-34 BOV, WAI, Under Construction
Clutch, Wheels, Tint, Paint, Interior, HID
hey thanks for both of your replies. so a vacuum leak, that makes sense because there are a few vacuum lines disconnected under the hood. now you say there could be a vacuum leak a the heater, (this may sound like a dumb question but once again i have minimal experience with heating systems.) do i look for vacuum lines at the heater core????? or underneath the dash by the ducts. do either of you guys know where i could find some vacuum diagrams they could be a lot of help getting these loose vacuum lines in their correct space.
once again thanx 4 ur replies
I think the hot water control defaults to the open position, so you don't completely freeze your butt off in the winter if the climate control goes out. It's right next to the firewall on the passenger side, kinda looks like the vacuum advance on an old distributor. Mine was silver in color. Make sure it has a vacuum line still hooked to it, or that the line is not cracked or broken further way from it.
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1992 Yamaha FZR 1000. 145 Hp, all stock..
I think the hot water control defaults to the open position, so you don't completely freeze your butt off in the winter if the climate control goes out. It's right next to the firewall on the passenger side, kinda looks like the vacuum advance on an old distributor. Mine was silver in color. Make sure it has a vacuum line still hooked to it, or that the line is not cracked or broken further way from it.
thanx for your reponse, im gonna dig into the dsh first thing in the morning ill let you know how i make out
thanx again
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