Idling Problem Finally Solved Tried Cleaning Aac Valve, Air Regulator, Adjusted Tps Etc But They Weren't The Cause!

[nigelswazi]

Hi,

Sorry not sure if this is where I should be posting but I wanted to let you all know the solution to my idling problem incase it helps offers solve theirs. For the last couple of months my idle has been erratic at times but it was sort of intermittent ,one minute it played up next it was almost perfect. I tried all the solutions people have posted on here and followed the excellent DIY's on cleaning the Air Regulator, AAC valve, re-adjusting TPS etc but nothing solved the problem. It wasn't until it was playing up and I monitored the sensors on my PFC that I noticed the O2 sensor voltage was around 3volts when the car was warm, should be between 0-1.0 volts only, that I realised the problem. This morning I sourced a new O2 Sensor, $92.80 trade ($129 Retail but try asking for a cash trade price) at Repco part number 2269013007 (Bosch). This is a straight fit made in Japan sensor with no wire chopping required, a lot of people have been using the EL falcon ones but they are a different type so I personally wouldn't recommend it plus you have to cut wires. After installing, 1min if you don't have the cover that stops you using a spanner, and the problem disappeared!

Hope this helps those who have tried everything but can't find the cause of their erratic idle. For those experiencing the same problem with a PFC check the O2 voltage when the idle is unstable and it should be around 0-1Volts and only higher when you initially turn the car on. For those without a PFC you will need to get a multimeter and measure the voltage once the car is warm and idling across the signal wire and ground.