Hissing noise coming from passenger side/ low idle
#1
Hissing noise coming from passenger side/ low idle
Recently purchased 98 civic ex lsvtec. So my car idles extremely low sometimes to the point where it shuts off on its own, around 500rpm to be exact, also lets say im cruising and i push the clutch in and the rpm drops all the way down to 0 car looks like its about to shut iff but it doesnt and the rpm goes back up to around 500rpm right away. Also im not sure if this has anything to do with it but I hear a hissing sound coming from the passenger side under the dash. Could it be a bad heater core? Maybe air in the cooling system causing the low idle? I want to check it out tomorrow i havent really had time to wrench on it yet. Any other suggestions on what might be causing my really low idle?
#3
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Re: Hissing noise coming from passenger side/ low idle
inspect for vacuum leaks first
and check the intake tubing itself for leaks which could be throwing sensors off, then post back if everything checks out
most likely a vacuum leak/something just got disconnected
side note: metal short-ram intake tubes normally have a kind of whistling sound; and you may just need to adjust an idle screw if there is one, or adjust the timing depending if it's been running like that since the swap (if previous owner just ran it like that)
most likely a vacuum leak/something just got disconnected
side note: metal short-ram intake tubes normally have a kind of whistling sound; and you may just need to adjust an idle screw if there is one, or adjust the timing depending if it's been running like that since the swap (if previous owner just ran it like that)
#4
Re: Hissing noise coming from passenger side/ low idle
inspect for vacuum leaks first
vacuum leaks and check the intake tubing itself for leaks which could be throwing sensors off, then post back if everything checks out
most likely a vacuum leak/something just got disconnected
side note: metal short-ram intake tubes normally have a kind of whistling sound; and you may just need to adjust an idle screw if there is one, or adjust the timing depending if it's been running like that since the swap (if previous owner just ran it like that)
vacuum leaks and check the intake tubing itself for leaks which could be throwing sensors off, then post back if everything checks out
most likely a vacuum leak/something just got disconnected
side note: metal short-ram intake tubes normally have a kind of whistling sound; and you may just need to adjust an idle screw if there is one, or adjust the timing depending if it's been running like that since the swap (if previous owner just ran it like that)
#5
Re: Hissing noise coming from passenger side/ low idle
The noise could be the refrigerant flowing in the A/C, which if it is still getting cold, is normal. There are no vacuum lines inside the cabin.
#6
Re: Hissing noise coming from passenger side/ low idle
#7
Re: Hissing noise coming from passenger side/ low idle
Recently purchased 98 civic ex lsvtec. So my car idles extremely low sometimes to the point where it shuts off on its own, around 500rpm to be exact, also lets say im cruising and i push the clutch in and the rpm drops all the way down to 0 car looks like its about to shut iff but it doesnt and the rpm goes back up to around 500rpm right away. Also im not sure if this has anything to do with it but I hear a hissing sound coming from the passenger side under the dash. Could it be a bad heater core? Maybe air in the cooling system causing the low idle? I want to check it out tomorrow i havent really had time to wrench on it yet. Any other suggestions on what might be causing my really low idle?
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