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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 197 on November 14, 2006, 04:47:00 PM

Title: Black Smoke?
Post by: 197 on November 14, 2006, 04:47:00 PM
When I floor my 73 with a 454, black smoke will poor out of the exhaust? What is causing this?

And my radiator hose is sometimes sucked in or has extreme pressure. Is that caused by my radiator cap?

Thanks

Title: Re: Black Smoke?
Post by: Blazin on November 14, 2006, 07:01:00 PM
Black smoke is a rich condition.

Title: Black Smoke
Post by: 197 on November 15, 2006, 09:01:00 PM
Is it running rich harming anything? Cuz its running great!

Title: Re: Black Smoke
Post by: Blazin on November 15, 2006, 09:23:00 PM
Poor fuel milage. Foul plugs. carbon buildup.  

Title: Re: Black Smoke
Post by: DnStClr on November 16, 2006, 11:50:00 AM
Here's a picture of an exhaust valve that ran rich for too long--

Don St.Clair
Culleoka Tn