Thanks for that Dennis. So at-near WOT, as the ECU tries to enrich the
mix, if the O2 sensor is not disabled (or rather, the ECU is not told
to ignore the O2 input), the O2 sensor might sniff "too much fuel"
then try to make part of the ECU programme lean out the mix?

Neil.

On 5/5/20, Dennis Haynes <d23haynes57@hotmail.com> wrote:

> I'm not fully sure how this works. My guess is that at full throttle this is
> how the O2 sensor was disabled. Full throttle gives some enrichment for
> power and to also prevent valve burn up. Later they just put that function
> in the ECU. For the electrically controlled EGR that gets disabled both at
> full throttle and idle.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Neil N
> Sent: Tuesday, May 5, 2020 3:42 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: Fw: Question-Oxygen Relay?

> https://eur05.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.thesamba.com%2Fvw%2Farchives%2Fmanuals%2Fafc_fi_training_troubleshooting_manual%2FAFC_FI_Training_Troubleshooting_Manual.pdf&amp;data=02%7C01%7C%7C0f3860209c104f5396e408d7f12c788f%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637243045647944660&amp;sdata=SKEpE1HvQvCrsWgmqlxtTc4zjLeWMPS1bcaMtg%2BSSYI%3D&amp;reserved=0

> Comments in Full Throttle Switch and Oxygen Sensor sections indicate to me
> that the OXS relay serves to work in conjunction with the ECU to control the
> O2 sensor input.

-- 
Neil n

VE7TBN

1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt

1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8

VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>