Ok so I recently had to change my fuel pulsation damper. Which means I had the intake plenum off and all that disconnected. Got it all back together and only had to glue two things. No check engine light after.
Went on a long drive on a rough road with lots of uphill in 2nd and 3rd gear. Got stuck in mud once and was doing a whole lot of spinning in 4wd hi and low. Got out, drive back.
Now when I accelerate I hear this sound like playing cards in the spokes. It's there through all gears but mainly 3 to 5. It doesn't happen in neutral.
I have a 94 pickup with the 3vze. I wonder if maybe a vacuum hose is leaking? Or there's an exhaust leak somewhere? I don't think it's the u joints. This is a lighter sound.
I haven't driven for long enough periods since to know if it goes away after a while. Any thoughts?

 

Turns out it does make the sound while just idling. I think it's an exhaust leak. Never heard one before but it makes sense. I may have busted my egr pipe in half at some point and JB welded it together and wrapped it in tape. I bet it's leaking there. Any harm in exhaust leaks other than power loss?

 

Depending on where it is, it can allow exhaust gas to leak into the cabin and kill you with carbon monoxide. I'd get it fixed, myself.

 

Well that sounds pleasant. Yep. Can't smell exhaust but it might not hurt to get a little co detector. Gotta find a "new" egr assembly at a junkyard. Or find a better way to patch that. Any suggestions on sealing a rough break so it doesn't leak?