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hey brickers,
my 90 240 makes a slight hissing sound when i'm accelerating. is this a vacuum leak? i was checking the archives and thought i read something about a hissing on deceleration being a sign of a vacuum leak, but i'm not sure.
does anyone know what might cause this?
the car also has a bit of a rough idle, but i'm pretty sure part of the reason is that i need a new O2 sensor...it hasn't tripped the check engine light yet, but my mileage has gone south fast - only around 330 kilometers (i'm in canada) a tank.
thoughts anyone?
g.b.
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