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Axleback Exhaust issue?

Old 03-15-2019, 11:44 PM
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Bizzenn
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Axleback Exhaust issue?

Ok so I have a 2014 q60 and I had a Top Speed Pro 1 axle back on it for about 9 months. As time went on, my Rpm's would drop when I stopped(mostly abrupt stops) and when I would turn into a parking space. It would even stall from time to time. The longer it was on, the louder and more sloppy sounding it got. So I put my stock one back on. No stumbling, smoother acceleration and no stalling. The top speed exhaust had no leaks. Do our cars just hate canister style mufflers?
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Old 03-16-2019, 01:01 AM
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slartibartfast
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No, they hate dirty MAFs and throttle bodies. You're looking at the wrong end of the car.
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Old 03-16-2019, 02:11 AM
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Bizzenn
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Your right, they hate that too.But even when I cleaned both of the above mentioned, it still did it. As soon as the stock muffler went back on, those issues were gone. Very strange.
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Old 03-16-2019, 06:31 PM
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slartibartfast
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Your symptoms are not those of an axle-back. Don't know what to say.
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Old 03-16-2019, 07:30 PM
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Bizzenn
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Yea I'm totally stumped. No worries though, it runs great.
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Old 03-17-2019, 01:41 AM
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Well, if you are increasing the outflow, you need to increase the inflow.
To fix the problem with your axle-back, you'd be wise to install forced induction. FI solves most problems like magic.
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Old 03-17-2019, 03:53 PM
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slartibartfast
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That's a naked attempt to push an agenda. Thousands of Gs have only exhaust changes that run just fine. I still think there's something wrong at the front of the car.
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Old 03-17-2019, 08:44 PM
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Bizzenn
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Don't get me wrong, it didn't happen alot, I just noticed that it didn't happen at all once I put the OEM muffler back on. The car runs perfect, smooth as silk.
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Old 03-18-2019, 12:14 PM
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Don't think hes going from a top speed axle back to Forced induction just a wild guess but.....
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Old 03-19-2019, 03:44 PM
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Exhaust leak on gaskets?
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Old Yesterday, 04:29 PM
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xxg00w0
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mine has the same issue too, but not all the time but it's annoying. TB and MAFS cleaned, new battery, suspecting fuel pump??
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