Quote:
Originally Posted by isaiah990
I’m not sure what the metal rapping noise is from as it comes on at the same time it begins to misfire. And I cropped the video, I was unplugging the coil pack to see if it it had an effect or not
-Sheesh now an exhaust leak, I’ll have to check that out. What noise is the exhaust leak making?
|
Exhaust leak is a flange leaking a bit of air. It will create like a raspy, muddy, air puffing noise. You mentioned aftermarket exhaust, you might want to recheck your flanges for leaks.
Engine seems to start at like ~1800rpm.
The exhaust-leak-like noise is most prominent in the beginning. It stops sharply at 8 seconds in the 2nd vid.
At that point, the engine slows down (maybe 1000rpm), the exhaust leak noise goes away, and the metal rapping starts. Although I'm 50-50 if I can very faintly hear the metal rapping (at higher speed) starting at like ~6 seconds. Could just be my imagination.
At 10 seconds, motor seems to speed up slightly (maybe 1250 rpm). No real other changes.
Stays mostly the same until 24 seconds when you seem to unplug the coil.
Motor slows down again (like 800rpm) and seems to miss more. Or motor sounds slower due to cylinder missing.
I guess the "exhaust leak" sound could simply be how your aftermarket exhaust normally sounds, but I wouldn't expect the microphone to pick up your exhaust note (from the tailpipe) so prominently while recording from inside the engine bay.