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Old 01-04-2012, 05:52 AM   #1
wvboxst3r
WV Boxster
 
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Join Date: Dec 2011
Location: WV
Posts: 251
Garage
rough idle with oil filler cap off

I have been reading about the AOS and the white smoke. My car is new to me and I have seen the puff.

So I just was out pulling radio and did the pressure test on cap. It was a little tight to start twisting but not much pressure. But the idle got rough and tried to smooth out, heard a vacuum like noise. Again very little suction but idle changed and heard air.

Is this normal.
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