funny AFR reading

[SirSamuelOfBuca]

My AFR normally reads band on 14.1 on idle.

When i pulled up to home last night noticed it saying 18

This morning its 18-20 but seems ok when i put foot down (didnt have much chance in traffic?)

Could be mixture screw? I will reset it tonight when im home but seems a bit odd to just do that.

Idle sounds normal as well :s

Any ideas welcome :)

[Brigsy]

If it was that lean on idle it would probably cut out and not idle well. If its running ok id recalibrate the sensor and check the exhaust for leaks

[SirSamuelOfBuca]

ye ill get it over the pit tonight :) weird!

[Tony Walker]

nuts are a pain for coming loose on 5s exhausts.

[SirSamuelOfBuca]

i know. Although I check mine weekly as i have a rattly exhaust lol :( bloody things!

[SirSamuelOfBuca]

hmm tried re calibrating it. no luck

Idle reading is 18-20 put foot down goes down to 13 then went all over the place and cut out at 22.4 which it stuck at. Wondering if i have melted my AFR unit?! :(

will check under car although bolt under turbo elbow downpipe felt a bit loose.

[Brigsy]

Sounds like the lambda sensor might have given up?

[SirSamuelOfBuca]

only installed it a few weeks ago :/ :( in KTEC downpipe