While having my car on and it idling, I noticed a hissing that sounds like it is coming from the rear of the engine. I don't think it is normal, maybe a possible heater hose leak?
slight hissing
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suprahero;1039907 said:
Probably. A hose must of come loose. I'm not to familiar with the noise..
67rstbkt;1039982 said:
Now that you bring this up, it brings me to a problem i have. I dont mean to hijack but it seems similar. Whenever the heater control is set to anything other than 65 degrees, the sound goes away. It more of a crackle/hissing sound that comes directly from the heater control valve. It only makes the noise when the car is running. Any ideas? Everything it plugged in correctly and the valve functions just fine.
67rstbkt;1039982 said:
I haven't even thought about turning the heat on, considering it being June in Texas. But I will try and let you know. And yes, it does idle kind of rough. It also jerks a little when accelerating and coasting, The idle often acts like it sticks, I have it to where it idles around 1k but after tapping the gas it will, like normal, rev up a little then drop back down, but sometimes it will stop around 1500 to 2k. Which probably means a vacuum leak, right...?
I have this very problem. its not a steady his but broken up. comming from the rear under side of the engine. I thought it may be an intake mani leak. If anyone find the cause of this pm me pls.
You need to find a shop with a smoke machine, and smoke the vacuum system. It's a great way of finding leaks.