I have a 2001 S-10 Blazer with about 60k miles. It recently started
knocking while going uphill or while accelerating. It almost sounds
to me like a diesel engine. Otherwise it runs fine. Its seems to do
it a little worse just after the first start of the day. It may be
coming from under the hood but it almost sounds like its some exhaust
thing. I tried using a tank of 93 octane gas instead of 87 and that
didn’t seem to help (only maybe a tiny bit).
Anyway, I’d prefer not to spend a bunch of money if its something I
can do. Does anyone have any suggestions where I can start looking.
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