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Maintenance & Repair Automotive Science or Voodoo?
113 messages, Last post on Oct 11, 2006 at 7:17 AM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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Replying to: user777 (Sep 26, 2005 5:01 pm) If you are experiencing very poor fuel mileage, below EPA, but no codes are being thrown, then I think maybe you need to be looking at say a conspicuous drop in horsepower...where the engine has lost power/efficiency but not due to a defect that the computer will recognize. For instance, (and I don't know the answer to this, so....) how would a dyno react if you let 20 lbs of air out of the tires? Or throwing it another way, could software tell you that your alignment is way out and that you are literally dragging your tires along? Probably not.
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Replying to: Mr_Shiftright (Sep 26, 2005 5:07 pm) without such a model, how do you know if a sensor is drifting, or out of calibration or "clogged"? it might not be tossing a diagnostic code, and yet it's not operating properly either. therefore, the engine may be running to a sub-optimal condition. for example the MAF or O2 sensors or the EGR valve.
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Replying to: user777 (Sep 26, 2005 5:14 pm)
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Replying to: Mr_Shiftright (Sep 26, 2005 5:17 pm) really, i don't think sensor validation is as critical in a vehicle, nor do they want tight tolerances, because of the false positives and desire for running reliability...this then comes at the detriment to detecting loss of efficiency due to the transducer measurement itself. am i totally duped? i don't know...this isn't my domain of expertise, but I got a sneaky suspicion that the car makers are using adaptive control within limits, and are diagnosing transducer failures within limits, but in the realm of possibility are vehicles runnning needlessly derated. they ain't tossing codes (till something like the CAT is fully gone), or the wires are falling off the 02 sensor.  meanwhile, the person is just burning gas faster than necessary. can you catch this during emissions testing time? i don't know - can you and have the vehicle not pass?
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Replying to: user777 (Sep 26, 2005 5:24 pm) |
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Hey, this looks small enough to put in a car! Let's all buy one...oh wait, you can't says FAQ.... http://www.lutec.com.au/index.htm |
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Replying to: dialm4speed (Mar 06, 2005 4:06 am) It is not a device but a liquid fuel additive one adds to your fuel every time you fill up. Use about 1-ounce for every ten gallons of fuel. It will clean your fuel system & combustion chamber. The theory behind all this is that you will have an even dispersement of fuel in the combustion chamber which has been cleaned. This clean combustion chamber, free of carbon build-up will provide the best environment for a 'complete burn' of the fuel. This means the more fuel gets burned=less pollution and more power! If you have a dirty fuel system or combustion chamber this will maximize your fuel consumption and may improve it substantially. Thank you for the opportunity. If you have any more questions please feel free to contact me. doug
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Replying to: dmcvickar (Oct 06, 2006 3:37 pm) Blue Sky? I think I would find another product line! |
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Replying to: dmcvickar (Oct 06, 2006 3:37 pm) I could see where a fuel injector CLEANER would give a better spray pattern but this has nothing to do with the combustion chamber. If the claim is that the additive changes the chemical composition of gasoline itself, I'd like to see the science behind that claim and what molecular changes have occurred. |
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