1999 ME7 purge valve cycle

Post by **abscate** » 22 Apr 2022, 03:31

At highway speeds, aboutevery12 minutes, my ME7 purges the evap canister for a bit less than a minute

Post by **BlackBart** » 22 Apr 2022, 11:47

What are we looking at? Is this VIDA?

Post by **scot850** » 22 Apr 2022, 13:38

Oooh! Very fancy new Autel toy!

Love the bigger screen and the ability to show decent size waveforms. Nice!

Neil.

rrres · Post by **rrres** » 23 Apr 2022, 10:11

Is it true that it will not purge, if the AC is on?

Post by **abscate** » 23 Apr 2022, 14:41

rrres wrote: 23 Apr 2022, 10:11 Is it true that it will not purge, if the AC is on?

It will not complete the readiness cycle if the AC is on. The readiness cycle is the dance it goes through before it decides that the evap system is working ok. I’m not sure how often it does this.

On edit. It tries to do this on every drive cycle. Having Ac on is one of the things that will cancel the test. User lexia posted the entire cycle and which codes get set in which phase, that thread isearcheable under that user name in this Forum

I believe it will still purge, which is a simple opening of the purge valve on the radiator to suck the canister clean