I have just noticed a low rumble sound when accelerating,no lose in performace etc.Muffler was replaced in Feb of this year. No check engine lights on ,etc. Any ideas?
1997 Hardbody
Nov 14, 2004
5 Replies
Climb underneath. Check for rusted and loose heat shields in exhaust system.
I can't see or smell it from here. The only reason I suggested that is because I have a 97 PU and pieces of the shield are constantly rusting away. I had one that would rattle for a few seconds when I cold started the truck, but as long as the truck didn't sit long enough for the exhaust to cool down, upon restart, it didn't rattle. When I ripped off the offending shield, it never rattled again upon a cold start. If you start pulling off pieces, never park where there is a chance that something under the truck could catch fire. This is warned against even when all the shields are intact, but even more so when the shields are taken off.
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