tune-up?
02-26-2008, 01:48 PM
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tune-up?
About 3 monthes ago i installed a full exhaust system into my cobalt ss/sc and since then my gas mileage had suffered. I was told from alot of users here that i need a tune-up...i talked to the mechanic that installed erything for me n he said that it wasnt necessary n that my car's computer will adjust to the changes n if not i would have a check engine light...i havent had a check engine light yet (knock on wood) luckily...so should i really get that tune-up? n is it that necessary?
bump....any1 suggestions?
bump....any1 suggestions?
Last edited by PaPiiShAmPuU; 02-26-2008 at 01:48 PM. Reason: Automerged Doublepost
02-26-2008, 02:01 PM
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adding an exhaust system will lean u up..but if ur tune was rich than u wouldnt get a code..its good to have it atleast looked at by a tuner everything is going good and u might wanna get a wideband also
02-26-2008, 02:10 PM
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Wideband zirconia sensor
A variation on the zirconia sensor, called the 'wideband' sensor, was introduced by Robert Bosch in 1994 but is (as of 2006) used in only a few vehicles. It is based on a planar zirconia element, but also incorporates an electrochemical gas pump. An electronic circuit containing a feedback loop controls the gas pump current to keep the output of the electrochemical cell constant, so that the pump current directly indicates the oxygen content of the exhaust gas. This sensor eliminates the lean-rich cycling inherent in narrow-band sensors, allowing the control unit to adjust the fuel delivery and ignition timing of the engine much more rapidly. In the automotive industry this sensor is also called a UEGO (for Universal Exhaust Gas Oxygen) sensor. UEGO sensors are also commonly used in aftermarket dyno tuning and high-performance driver air-fuel display equipment. The wideband zirconia sensor is used in stratified fuel injection systems, and can now also be used in diesel engines to satisfy the forthcoming EURO and ULEV emission limits.
A variation on the zirconia sensor, called the 'wideband' sensor, was introduced by Robert Bosch in 1994 but is (as of 2006) used in only a few vehicles. It is based on a planar zirconia element, but also incorporates an electrochemical gas pump. An electronic circuit containing a feedback loop controls the gas pump current to keep the output of the electrochemical cell constant, so that the pump current directly indicates the oxygen content of the exhaust gas. This sensor eliminates the lean-rich cycling inherent in narrow-band sensors, allowing the control unit to adjust the fuel delivery and ignition timing of the engine much more rapidly. In the automotive industry this sensor is also called a UEGO (for Universal Exhaust Gas Oxygen) sensor. UEGO sensors are also commonly used in aftermarket dyno tuning and high-performance driver air-fuel display equipment. The wideband zirconia sensor is used in stratified fuel injection systems, and can now also be used in diesel engines to satisfy the forthcoming EURO and ULEV emission limits.
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