Exhaust tick

[Shadow711]

Think it's coil packs? I think I can hear it in the engine bay as well

 

[SLCHOE]

You have a misfire. Your Yukon probably has the original y-pipe and not "true duals". Might want to look underneath and check.

 

[Shadow711]

It has true duals.

 

[Shadow711]

I'm gonna try replacing coils #2 and #6 tomorrow

 

[SLCHOE]

It has true duals.

So each exhaust manifold has its own pipe to it's own tailpipe and nothing tying in the two sides together. Correct?

 

[Shadow711]

So each exhaust manifold has its own pipe to it's own tailpipe and nothing tying in the two sides together. Correct?

Lol yep

 

[Shadow711]

If the firing order diagram I'm looking at is the correct one, then it makes no sense that if 2 and 6 are missing why id have the same sound coming out both exhaust runs. This diagram shows 1,3,5,7 on the right side if you are facing the engine and 2,4,6,8 on the left. Is that correct?

 

[drakon543]

That video sounds like you have a little valve chatter. How many miles are on this truck. If you truly have true dual the reason your exhaust sounds like its pulsating so aggressively is the super 10s. You went from a 50 series single tip which is combining the exhaust pulses and has several chambers and baffles to smooth out the exhaust tone. Super 10 is pretty close to straight piped. Each tip now only has exhaust pulses from 4 cylinders. As i mentioned before occasional misses happen if it was a constant miss it would vibrate the truck especially if it was 2 cylinders on the same side.

 

[Shadow711]

That video sounds like you have a little valve chatter. How many miles are on this truck. If you truly have true dual the reason your exhaust sounds like its pulsating so aggressively is the super 10s. You went from a 50 series single tip which is combining the exhaust pulses and has several chambers and baffles to smooth out the exhaust tone. Super 10 is pretty close to straight piped. Each tip now only has exhaust pulses from 4 cylinders. As i mentioned before occasional misses happen if it was a constant miss it would vibrate the truck especially if it was 2 cylinders on the same side.

136k miles. That's so weird. I had a silverado with true duals, no cats, no mufflers, straight pipe and it didn't sound like this. Maybe its the way these mufflers sound. If so i wish i wouldn't have changed to them. Nothing that I listened to in person on others vehicles or on youtube sounded like mine sounds.


Would putting in an X pipe change anything?

 

[drakon543]

X pipe will change the sound a little as its balancing the exhaust pulses back out.

Flowmaster 10s true duals tend to have more of a classic guttural glasspack blatt sound. You might have been happier just switching the 50 series out with a 40 series or a super 44. You went from a 50 series (calm mellow growl) straight to flowmasters 2nd most aggressive sounding muffler. The only muffler they have that's more aggressive is thier outlaw bullet muffler which is just a tiny glasspack.