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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 87ChevyMan on March 28, 2013, 07:13:32 am

Title: 1987 C-10 350 Has strong gas smell while running
Post by: 87ChevyMan on March 28, 2013, 07:13:32 am

All,

I recently did some performance mods on my stock 350 TBI.  I went from the stock swirl port cylinder heads (76cc) to a pair of cast iron Engine Quest 903 Votec Hybrid Marine cylinder heads (64cc).  I also replaced the OEM intake manifold with a Edelbrock TBI Performer, and I swapped out the lazy stock cam for a Lunati Voodoo Hydraulic Flat Tappet Cam #10120701:

•Advertised Duration (Int/Exh): 256/262
•Duration @ .050 (Int/Exh): 213/219
•Gross Valve Lift (Int/Exh): .454/.468
•LSA/ICL: 112/108
•Valve Lash (Int/Exh): Hyd/Hyd
•RPM Range: 1000-5500

The cam has a slightly noticeable idle and gobs of torque.  I also had a custom chip burned for my setup by TBIChips.  The truck runs well, overall.  My only complaint is that is smells profusely of gasoline when it runs.  I mean if I take the truck for a drive, I can smell the exhaust fumes on my clothes when I come inside my house.  Is there some kind of sensor or fuel mixture screw (like on traditional carburetors) that can be adjusted to fix this?

Thanks for your help.

Title: Re: 1987 C-10 350 Has strong gas smell while running
Post by: Fairlane514 on March 28, 2013, 07:37:34 am

Sounds like its running extremely rich. Have you talked to TBI chips and explained your problem? I would start there.