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running rich

Old 11-Sep-2009, 03:28 AM
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Join Date: Sep 2007
Location: Toronto
Posts: 59
running rich

I have always noticed a very strong gas smell coming from my exhuast on my 91 civic hatch. Its a b16 swap.
Its so strong i could smell it when i idle while waiting for the red light!
I got new plugs, wires, cap rotor, changed both the o2 sensors, fuel filter, even changed the oil recently and i refill from shells vpower.
Anyone know whats happening =[
For fuel milage i get roughly 10km/L so roughly 400 per tank.
I havent done any mods to the engine etc etc
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Old 11-Sep-2009, 10:57 AM
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Posts: 81
I have the same problem with my civ, but i got a stock engine.. Im thinking mabye it has something to do with my old o2 sensor.
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Old 02-Oct-2009, 10:24 PM
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Location: Pfaff
Posts: 1,556
You might have the wrong ECU or map in there (if it's chipped) I would contact zeeman for this.

You may have a bad catalytic convertor from running overly rich. This will give you that bad gas/sulphur smell. To find out why you are running rich, you are going to have to run through a diagnostic process.
-fuel injectors
-ignition coil output
-engine efficiency
-Vacuum leaks
-Ignition and mechanical timing
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