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Registered
Join Date: Oct 2004
Location: Fayetteville, NC
Posts: 680
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Exhaust noise
When driving everything is fine when accelerating or cruising but when I let off the throttle I hear a rumble sound coming from the exhaust. What is causing it? Could it be lean or rich running?
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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08-15-2008, 07:47 PM
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Join Date: Jan 2004
Location: Pittsford, NY
Posts: 3,702
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your plugs should be looked at to determine if the fuel/air mixture is fine. The 'rumble' might need a bit more defining, could just be normal engine braking sounds.
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Tony G 2000 Boxster S |
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08-16-2008, 05:03 AM
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Location: Fayetteville, NC
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I'll take a look at the plugs today.
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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08-16-2008, 07:05 AM
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Join Date: Jul 2003
Location: Back in B'ham, AL
Posts: 3,459
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Is that a "new" sound or it's been the same?
How long since you have the car? It could be normal - p-cars rumble... but are mufflered - unless something has changed lately. |
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08-16-2008, 08:33 AM
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Join Date: Oct 2004
Location: Fayetteville, NC
Posts: 680
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I've been playing with the Megasquirt VE tables and just noticed the "rumble" on decel. The car runs great (I did the DE event at Lowes in July). I've had the car for almost 4 years and Megasquirt for a little over 2 years. Still haven't checked the plugs yet.
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'77 911S w/'81 3.0/MegaSquirt/MSD '81 911SC stock |
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08-16-2008, 04:15 PM
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