u/Content-Insect-8770

Can someone please tell me what might be wrong with my car?

Im not a car guy at all. My knowledge is very limited to the basic stuff. Last Saturday, i went to a shop to do my yearly inspection. They lift my car up and show me my muffler rusted off from the exhaust pipe. So i told them I would look into replacements. So yesterday while I was driving i suddenly started hearing this sound thats on the video. The faster i drive, the faster it sounds. I thought it was my tires but nope. Im very unsure of what it is. Does anyone might have a clue? Thanks!

Car is a 2008 Honda Civic btw. Has about 122K miles.

u/Content-Insect-8770 — 16 hours ago

▲ 4 r/hondafit

My 2015 Fit (LX CVT) has 155k km on it (close to 100k miles) and despite being otherwise meticulously maintained, I've noticed it has dropped about 5-7% in efficiency over time (I've owned it since new). I've been thinking of doing an intake valve chemical soak via throttle body, but AI said it is unlikely to dissolve the caked-on-for-11-years deposits and repeated treatments could damage the cat.

So, that brought me to thinking about walnut-blasting the intake valves. Has anyone done this with a similar profile to mine (well-maintained aside from ignoring the intake valve deposits over ~150k km)?

Thoughts on the cost/benefit? Or whether repeated chemical soaks are a better idea? Obviously there are very likely other factors (perhaps slight wheel bearing degradation, for example) contributing to the 5-7% efficiency loss, so I'm expecting a 3-5% FE gain from the process.

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u/Content-Insect-8770 — 21 days ago