hi guys, im having a problem with my 1.8t ibiza, its currently remaped and running 200ish bhp, bought it like that. i am having problems with the car smelling and on start up getting whiteish grey smoke and same when deaccrelating when revving up. the exhaust tail pipe is extremely sooted up, i put a piece of paper there when starting it up it didnt smell like oil but its lots of little dots i think its soot which makes me think its fueling. i looked through the FAQ and found this
O2 Sensor – Because of strict emissions these 1.8T’s are very sensitive to readings from the O2 sensors. MY 2001+ have a wideband front O2 sensor with high accuracy and a linear response. The car will adjust the fueling based on the readings from the sensor. If the sensor is over heated, exposed to lead (race gas), flooded with soot (too rich) or is just old, it can provide the car with false readings and the car will not provide the proper fueling. When the O2 sensors go bad and the ECU detects this the car will run on reserve fueling maps and will not be able to adjust for boost leaks, fuel pressure, MAF readings or any other parameter that affects fueling. To check for a bad sensor the first thing to do is run block 032 on the VAG com. If the sensors are bad, the readings will both be 0%, replace the Front O2 sensor. If the sensor is bad, it will also respond slowly, or reach a peak. Logging block 031 will show the lambda reading from the O2 sensor as well as the requested lambda from the ECU. To get air fuel ratio multiply lambda by 14.7. If the log shows the lambda jumping wildly when running through a gear, or perhaps it flat lines at an unreasonable level, then the O2 sensor should be replaced. If the o2 sensors get shorted out or the wires get pulled, they will damage the ECU, be careful with the wiring on these sensors. 2000 and older cars do not have a wideband sensor, however they will still perform some adjustment of fueling based on the sensor
i did what it says and it says on block 032 0% on both lambda sensors, although i am told when they are remaped they turn off the 2nd sensor, i am also now and again getting the CEL light on and displaying the codes;
Control Module Part Number: 6K0 906 032 AA
Component and/or Version: 1.8L 20VT EU3 0002
Software Coding: 10500
Work Shop Code: WSC 00000
1 Fault Found:
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 35-00 - -
i assume these are interlinked, and does this deffo sound like my lambda up the duff, thanks in advance
luke
O2 Sensor – Because of strict emissions these 1.8T’s are very sensitive to readings from the O2 sensors. MY 2001+ have a wideband front O2 sensor with high accuracy and a linear response. The car will adjust the fueling based on the readings from the sensor. If the sensor is over heated, exposed to lead (race gas), flooded with soot (too rich) or is just old, it can provide the car with false readings and the car will not provide the proper fueling. When the O2 sensors go bad and the ECU detects this the car will run on reserve fueling maps and will not be able to adjust for boost leaks, fuel pressure, MAF readings or any other parameter that affects fueling. To check for a bad sensor the first thing to do is run block 032 on the VAG com. If the sensors are bad, the readings will both be 0%, replace the Front O2 sensor. If the sensor is bad, it will also respond slowly, or reach a peak. Logging block 031 will show the lambda reading from the O2 sensor as well as the requested lambda from the ECU. To get air fuel ratio multiply lambda by 14.7. If the log shows the lambda jumping wildly when running through a gear, or perhaps it flat lines at an unreasonable level, then the O2 sensor should be replaced. If the o2 sensors get shorted out or the wires get pulled, they will damage the ECU, be careful with the wiring on these sensors. 2000 and older cars do not have a wideband sensor, however they will still perform some adjustment of fueling based on the sensor
i did what it says and it says on block 032 0% on both lambda sensors, although i am told when they are remaped they turn off the 2nd sensor, i am also now and again getting the CEL light on and displaying the codes;
Control Module Part Number: 6K0 906 032 AA
Component and/or Version: 1.8L 20VT EU3 0002
Software Coding: 10500
Work Shop Code: WSC 00000
1 Fault Found:
16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 35-00 - -
i assume these are interlinked, and does this deffo sound like my lambda up the duff, thanks in advance
luke
