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jay71 jay71 is offline
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Join Date: Nov 2005
Location: Evergreen, CO
Posts: 170
Gas vapors in cabin while on boost

I've been noticing a strong smell of gas fumes in the cabin while on boost. This is my first fall/winter in the car where I've used the heat- until now the windows/sunroof have been open for the majority of my driving. I have relatively new GHL headers w/heat (approx 4000 miles on new headers) and I'm starting to wonder if I have a crack or something that is allowing gas fumes from the exhaust to leak into the heater boxes & cabin. My AFR drops to 10.5-11 at 0.9-1bar- and the gas smell occurs. Otherwise I don't smell/notice anything during non-boost driving (AFR is typically in the 13-14.5 range while cruising). I have a Leask adjustable WUR- and I know I need to tune it a bit to get it a little leaner while on boost...but regardless of the air/fuel mixture I would think the only indication of low AFR should be suboptimal performance/low readings on my gauge; not gas vapors in the cabin. Am I correct in thnking I have a header issue- or is there something else that may be causing the fumes in the cabin at low AFR's? Thanks, in advance, for your help.
'86 930
'60 Land Rover Series II SWB
Old 11-09-2008, 11:49 PM
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