C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Right hand pipe smoking

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Old Nov 10, 2005 | 06:02 PM
  #1  
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Default Right hand pipe smoking

Hi all,

I've noticed for quite a long time that when the air is cold and/or moist enough the right hand exhaust pipe emits some smoke whereas the left hand one doesn't I believe this smoke is actually condensation as some water stays on the rear bumper (just above the pipe) after I shut down the engine...and again, no water on the left side of the bumper.

Why is this? I mean why is there only one side emitting this "smoke"?

Ths for your replies

Greg
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Old Nov 10, 2005 | 08:27 PM
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MikeC4
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From: Austin Texas
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not much to go on here, could be son many things, but my first guess would be your right side O2 sensor my be shot, sending erroneous information back indidcating a rich condition. The ECM in turn will lean out the AFR and the right side will run hotter. Check to see if you have any error codes stored.

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Old Nov 10, 2005 | 08:32 PM
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From: The reason time exists is so everything doesn't happen at once
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Does this smoke continue for a long time or only until the engine warms up?

Back in the "dark ages" when we used carburators and chokes, exhaust gas was temporarily routed from one side of a V8 through the intake manifold to warm up the engine so all exhaust came through one exhaust pipe (usually the right side). After the engine was sufficiently warm the choke would come off and both exhaust pipes were in use. I don't know if modern fuel injected engines use this.
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Old Nov 11, 2005 | 12:39 PM
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I don't have any code stored, so I don't think that the O2 sensor is dead, More the gas mileage is normal so I don't believe that I might run rich.

Thanks for your help
Greg
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Old Nov 11, 2005 | 06:57 PM
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ittlfly
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From: Sun City West Az
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Just a suggestion.......... pull the plugs on the right bank and compare them to each other. That should help in the diagnosis.
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Old Nov 11, 2005 | 07:06 PM
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From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
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I always hold the pipe or bong with my left hand.



Is your exhaust true duals? My L98 goes all through a single 3" cat, so the tips don't care what side of the motor its coming from. I notice sometimes more steam coming out the right side, but I assume that's because the condensation in my slightly offkilter rear y pipe drips over to that side. I don't even have mufflers either.
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