Idle sporadically jumps to 2000 RPMs

[Bitsyncmaster]

It's been a long time since I connected Logworks to my wideband. I finally found a download for my new laptop and it actually worked.

My car is displaying about 14.2 AFR just sitting at idle. I did not really warm up the engine much and the AFR is swinging from about 13 to 15.

I unplugged the FV and engine almost died but it did stay running displaying 20.5 AFR. So with my test is it did go lean when the FV was unplugged.

[NckT]

Well I got that the wrong way round, my mistake !

It's when I fix the lambda circuit/ computers and reinstate the frequency valve's operation it goes rich and it had to be leaned out accordingly.

Thanks for taking the time out to use your wideband o2 sensor