Q: Hissing sound
Previous Question(Answered):
Q: Hissing sound asked by Jimmy F on August 23, 2016
Hello, on my two cars Hyundai i10 2010 and BMW x3 2006 I can hear a hissing sound when I open the throttle On the Hyundai it can be heard on low RPMs and it sounds like a vanos valve(which I doubt that car has) but on the X3 it is much higher and can be heard at high RPMs (Full throttle).
Follow Up Info: No check engine light on yet at full throttle a burn odor can be smelled. Are these two things correlated?
My car has an automatic transmission.
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