turbo?
18 September 2004, 10:22 PM
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turbo?
Hi, can anyone help me with a prob? Have got a 93 impreza WRX and it had been run on a mixture of helicopter and unleaded fuel previously. Black soot out of exhaust while under full boot? Turbo has slight oil about it. plz help!!
18 September 2004, 11:22 PM
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Lambda sensor probably damaged by leaded aviation fuel, which would then cause probably overfuelling off boost. On boost though is a different matter.
20 September 2004, 11:08 AM
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Running on a mix with helicopter fuel will coat everything in your engine with a lead oxide deposit, as John says the Lambda sensor will be affected as will any catalysts in the exhaust system and these will need replaced due to coating with lead. A build up of carbon in the exhaust would be inevitable as avgas is basically a paraffin and wont burn very well in a petrol engine. It may well be that this is just blowing out when the gas speed is sufficient, other than that black smoke normally dictates overfuelling.
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