Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks

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VCCA Home Forums TECHNICAL - 1945 AND NEWER 1971-1979 Thanks to all who have helped. 1 more question tho

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Thanks to all who have helped. 1 more question tho #168271 03/17/10 02:15 AM
Joined: Mar 2010 Posts: 32 arizona sixyearsdown OP Shade Tree Mechanic
OP sixyearsdown Shade Tree Mechanic Joined: Mar 2010 Posts: 32 arizona	How do i get my exauhst to not smell so much of gas. I adjust the air and fuel screws and it gets worse. Even blows black smoke till i take them back to where they were. I need my truck to pass emissions, how do i get that to happen. Thank you again. im listening because somebody always knows more than I.

Wilwood Engineering1955-1957

Willwood Engineering

Wilwood Engineering designs and manufactures high-performance disc brake systems.
Wilwood Engineering, Inc. - 4700 Calle Bolero - Camarillo, CA 93012 - (805) 388-1188

Re: Thanks to all who have helped. 1 more question tho sixyearsdown #168285 03/17/10 10:31 AM
Joined: Nov 2001 Posts: 19,758 Likes: 63 The Great State of TEXAS Chipper ChatMaster - 15,000
Chipper ChatMaster - 15,000 Joined: Nov 2001 Posts: 19,758 Likes: 63 The Great State of TEXAS	The gas smell is most likely due to too much gas and to little air in the air-fuel mixture. Is the float level set too high? Are the metering jets the correct size for your engine? Is the engine timed correctly? If the air:gas mixture is not right and the mixture does not burn correctly then the emissions will suffer. How Sweet the roar of a Chevy four!

Re: Thanks to all who have helped. 1 more question tho Chipper #168371 03/18/10 04:42 AM
Joined: Mar 2010 Posts: 32 arizona sixyearsdown OP Shade Tree Mechanic
OP sixyearsdown Shade Tree Mechanic Joined: Mar 2010 Posts: 32 arizona	the jets are correct but ill mess with the floats some. I tried adjusting the gas air screws with no satisfaction but i will mess with the floats now. Thank you very much chipper im listening because somebody always knows more than I.

Re: Thanks to all who have helped. 1 more question tho sixyearsdown #168398 03/18/10 11:26 AM
Joined: Nov 2001 Posts: 19,758 Likes: 63 The Great State of TEXAS Chipper ChatMaster - 15,000
Chipper ChatMaster - 15,000 Joined: Nov 2001 Posts: 19,758 Likes: 63 The Great State of TEXAS	If the air adjustment screws don't affect the idle then there is a problem somewhere. Are you sure that the low speed jets are properly seated and gas is not bypassing them? Is there an internal gap that allows excess gas to pass. Are the throttle plates centered in the bores? How Sweet the roar of a Chevy four!

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