Is this sound normal...
 

I hear this chugging/pulsing sound. It doesnt really sound like an exhaust leak. Since I am a rx8 noob, figured I would ask the experts.

All the nipples on the airbox/maf on? SSV in decent shape? Hose off the air pump good?

I haven't torn into it. Just figured I would make sure it wasn't a normal sound first.

It didn't sound normal. No codes or anything else crazy?

Only code it had was a rotor 1 misfire. Cleared code and fired it up a few times with no codes coming back.

Still the strange surging sounds?

Yep. Just picked to car up Saturday. Aside from a somewhat rough idle, seems to run okay.

I would do the normal eight stuff. Change plugs and coils. Check cat, do compression check. Save to rebuild motor.

These were posted on 8 club about the misfire and rough idle.

Rough Idle PDF:
http://www.rx8club.com/attachments/s...ollingidle-pdf

Misfire Diagnosis:
http://www.rx8club.com/attachments/s...p0302_1of4-jpg
http://www.rx8club.com/attachments/s...p0302_2of4-jpg
http://www.rx8club.com/attachments/s...p0302_3of2-jpg
http://www.rx8club.com/attachments/s...p0302_4of2-jpg

I'm not sure that is the procedure for an RX-8.

The 'official' Mazda dealer procedure is: 'Runs rough or does not start? Replace engine'

Super Cereal

Well I plan to start off with plugs/wires/coils since no idea when they were last changed. The car starts in about 2 seconds and idles. Previous owner said Mazda told him rotor 1 is dead, but I have a hard time believing that.

I was just wondering what this weird pulsing air noise is.

DJ: shoot my that quote on the coils and I will send $$$.
.

I have the money for the rebuild already haha. Just want to confirm its low comp before I dump the $$$ into it.

Yeah yeah yeah.

I'm no RX8 expert, but that sounds similar to what a leaking air pump/ACV plumbing sounds like on an FC. Do '8s still have air pumps & ACV's for emissions? If so, give the associated hoses & plumbing a good visual inspection for cracks/leaks.

Airpump is electric and only runs during initial startup, and blows directly into exhaust manifold through a (separate from engine) ACV type valve