I just picked up a 95 DC4 (LS model) obd1
I actually love the car its clean
but I am hearing a long hissing sound when I turn off my car completely
It seem to be coming out somewhere near the belts/AC core can't really pin point the sound.
I sometime do see coolant on my drive way
Please send me any helpful links or information
Thanks HT!

 

Its probably just pressure equalizing in the A/C system. Cold air intakes will also do it as the vacuum slowly leaks out of the IM when you kill the engine.

 

^ i agree. intake on the car? my short ram intake also makes a long hissing sound after i kill the ignition. have a buddy start your car then shut it off while you listen, if its coming from the intake you will know. its easily diagnosable if thats the case.

 

Just like the last 2 said, its probably just your intake, nothing to be alarmed about.

 

guys I don't have an aftermarket intake its bone stock nor did the previous owner did anything to the engine.

 

hahahah, if its not your intake, then i dont know what is. How long does the hissing sound last?

 

any helpful hints HT members?

 

bump