Technical EGR valve cleaning

[Moimo]

Having cleaned in the past using carb cleaner and brake cleaner and wash and dry with soap and compressed air, this time I used cola!! Pretty effective on a second hand replacement

 

[Peter Pick-Up]

Now you know the way the rest of your inletsystem is looking....

 

[irc]

... and digestive system...

 

[Moimo]

Sadly not effective enough, I have had the odd EML on and off all EGR related, initially a few intermittent open circuit and now mainly EGR position, MES records expected and actual position, actual position 0.00. I think the valve is fine and there is a wiring issue, EGR test through MES reports EGR blocked, again my head says not open due to wiring/electrical issue. Has any one had a similar problem? still not inclined to blank it as I’d rather it just work as intended. Appreciate Peters comment about the filth in the inlet system, the MAF was solid and 18 months ago I had the inlet off and pressure washed it and it was unbelievable, in old days we polished the inside rather than dig treacle out. Attached is MES wisdom, I’m confident it’s an open circuit and hope some one has seen it before.

 

[Moimo]

Having continued to delve into the issue, I spotted a tiny split in a vacuum pipe and felt sure this would solve it

 

[Moimo]

After a few days of no egr issues beep! On comes the check engine light, new MAP sensor, instant cure. Overall the system is a lot healthier than a few weeks ago so I’m happy to have got there in the end, and in the defence of the EGR valve it was fine all along.

 

[Goudrons]

still not inclined to blank it as I’d rather it just work as intended. Appreciate Peters comment about the filth in the inlet system, the MAF was solid and 18 months ago I had the inlet off and pressure washed it and it was unbelievable

All the crud in the inlet is soot mixed with crankcase blowby (and a little unburnt fuel).

For little cost and effort, you can help protect the inlet for all that crud.
You just need to remove or limit one of the two.

That's either blanking off the soot/EGR (which you don't want too) or rerouting the crankcase blowby breather through a catch tank.

Though if you do the latter, use a baffled one suitable for a diesel engine, compression ignition engines breath a lot heavier than spark ignitions do.

 

[Moimo]

The latter is definitely of interest and I shall look into it, thank you. I have fitted the restrictor plate a while ago which has been very successful.

 

[Moimo]

So the crankcase breather comes out the crank case and in the old days there was a flame trap prior to entering the cam cover, I take it I would be looking for something similar with no flame trap. Seen this sort of thing, .3 litre baffled catch tank

Is that along the right lines?