i have a 98 zx2 5spd .i am getting a loud squeal or cherpping sound at about 2k rpm,at idel,and when the engine is turned off..it`s not a belt or bearing. i believe its vacume related,pvc has been changed,.. the sound seems to be comming from the area where the pvc hose goes into the intake... HELP

 

heard IAC or MAF, but suspect IAC

 

there is a black plastic valve right by your valve cover it is about 2 inches wide take it off and try and blow threw it i bet you its plugged they plugg then engine builds too much pressure and blows it out past seals annoying sound

 

hockeyhitman69 you were correct, no more squeal,chirp,noise..thankz i been trying to solve this problem for two years,as many others on other internet forums,tell the zx2 world!!!

 

well it wasnt an easy one to figure out and i got help from one of the older techs at our shop but thats why they call it experience.had a few since then

 

I had the exact same prob on my 97 after I took apart the intake system. After this I could nto figure out the problem...even some of the most advanced mechanics were stumped!!

After coming to the conclusion that it was the pilot bearing, we dropped the trans and were ready to replace the clutch, rel. bearing etc.. Still after all this, the noise was still there. After simply turnign the valve around (I installed it backwards), the car ran normally again!!!