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Old 11-19-2013, 04:48 PM   #1
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Default 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.







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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-19-2013, 06:14 PM   #2
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All the nipples on the airbox/maf on? SSV in decent shape? Hose off the air pump good?
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Old 11-19-2013, 06:42 PM   #3
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I haven't torn into it. Just figured I would make sure it wasn't a normal sound first.
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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-19-2013, 06:48 PM   #4
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It didn't sound normal. No codes or anything else crazy?
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Old 11-19-2013, 07:17 PM   #5
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Only code it had was a rotor 1 misfire. Cleared code and fired it up a few times with no codes coming back.
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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-19-2013, 07:20 PM   #6
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Still the strange surging sounds?
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Old 11-19-2013, 08:15 PM   #7
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Yep. Just picked to car up Saturday. Aside from a somewhat rough idle, seems to run okay.
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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-19-2013, 08:23 PM   #8
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I would do the normal eight stuff. Change plugs and coils. Check cat, do compression check. Save to rebuild motor.
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Old 11-19-2013, 08:46 PM   #9
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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:



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Old 11-20-2013, 07:00 AM   #10
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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'

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Old 11-20-2013, 07:06 AM   #11
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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 $$$.
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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-20-2013, 07:09 AM   #12
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Quote:
Originally Posted by JL1RX7 View Post
I would do the normal eight stuff. Change plugs and coils. Check cat, do compression check. Save to rebuild motor.
I have the money for the rebuild already haha. Just want to confirm its low comp before I dump the $$$ into it.
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Quote:
Originally Posted by Wesley Carlock aka RotoriousRX7
"Rotarys come with built-in traction control, its called no torque"
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Old 11-20-2013, 07:12 AM   #13
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Yeah yeah yeah.
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Old 11-20-2013, 11:14 AM   #14
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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.
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Old 11-20-2013, 07:18 PM   #15
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Airpump is electric and only runs during initial startup, and blows directly into exhaust manifold through a (separate from engine) ACV type valve
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