Lambda CAN

[cattlerustler]

I'm having real trouble with a Monsoon X running the CAN Lambda, maybe 50% of the time the lambda just reads zero, there is no rhyme nor reason when it doesn't work. sometimes it will just start working 5 minutes into a drive other times it just won't come on at all, others it will work from start up right through to end of journey. I am using a Link CAN Gauge (via a CANTEE) so I know when it isn't working, I've tried multiple different wiring ideas, with without termination long wire short wire etc but the end result is always the same, whilst out for an hour last night it didn't work even though I restarted the ECU etc 4 times until I pulled the car into the garage, not that I think it matters but the engine is a YB cosworth, I'm at my wits end  

[Vaughan]

Take a PCLog and attach it here, I suspect you will be getting a Lambda Error 16 but the statuses in PCLink will show what the lambda sensor is doing and why it isn't running.

[cattlerustler]

Thanks I'll do that next time I drive the car

[cattlerustler]

So it looks like I have resolved the issue, with some googling it looks to be "noise" in the electrics even though the power was well separated for noisy components like coils and injectors, adding a 35v 22uf capacitor across the power for the CAN Lambda has done the job so far even though I've only run it for about an hour

[Confused]

Yep, a 22uF capactor seems to be the solution to many CAN Lambda issues, and I would always suggest installing with the capacitor up front, just to minimise the chances.

[cattlerustler]

it seems so common it should be built into the loom or included in the kit and instructions

[Adamw]

It is only older V1.2 hardware that could be upset by large voltage spikes from inductive devices.  The current version V1.3 has been sold for a couple of years now and should not need any external decoupling.   

[cattlerustler]

Well I bought and fitted mine about 18 months ago and I have no idea what version it is, I'd be annoyed if it was an old version, but at least it seems to now be working correctly after a lot of frustration and unresolved tech support directly with Link

[Adamw]

9 hours ago, cattlerustler said:

I have no idea what version it is

The version number is on the sticker with the serial number on the back.  

[cattlerustler]

Just now, Adamw said:

The version number is on the sticker with the serial number on the back.  

cool I'll look to see, I will be miffed if I've been supplied an old version