EGR - Whats the go?

[ojb00m]

Hi,
Ive only just joined up, and Im sorry to say that I'm far from mechanically minded - but learning fast!
I have had a 92 MU since March and have had a heap of work done on it since - it seems to be a never-ending story.
BUT the lastest issue is the EGR valves that are blowing off whenever I turn on the interior fan (this is NOT connected to the air conditioner)
In turn I dramatically lose power to the car and can't seem to get it over 80km / 100km (when really pushed and going down a hill)
This only happens when I turn the fan on.
Can anyone suggest why this may occur? It never used to be a problem and only started about 2 months ago.
I am living with it at the moment by not turning the fan on, but this is annoying and impractical on occassions.
I've been reading in other posts that many people disconnect the EGR. Is this the best step forward? I do have a vague green conscience and not sure how this will affect my emissions.
Any advice appreciated
Thankyou!

[geeves]

They are meant to reduce nitros oxide but they also do cause a few problems. Most engines seem to produce less smoke with them removed so it seems to be less nitrous at the expense of more particulate.
Your problem is a little strange as the electonics that control the fan have absolutly nothing to do with the egr electronics. Removeing the egr valves and sealing the holes in the inlet and exhaust manifold should overcome the symptoms but Im a little worried about how this is happening. Have you had electrical work done on the car?

[ojb00m]

I haven't had any work done on it myself, but it does seem that previous owners have had a go - and not necessarily by professionals.
I've got a turbo timer and immoboliser (which has stopped working also) that I suspect were installed at home, and there are some smaller issues with the passenger electric window, cigarette lighter etc. There is a fair bit of what's been identified as 'dodgy' wires kicking about under the bonnet.
I was going to go to an auto electrician next, but have had a few problems with mechanics looking at the MU and not knowing what to do with it. Very disheartening.

At the moment my current mechanic is replacing the vacuum hoses (some were damaged) and hoping that they may help solve the problem somewhat.
It sounds like it may just be easier to have the EGR valves removed then tracking down a part and trying to replace them, especially if most people do that anyway.

Thanks for your advice, greatly appreciated.
I'll try an auto-electrician next to sort out the issue with the fan.

[geeves]

Under the bonnet tell them its a Rodeo and it will suddenly become much clearer. There are several Mus in your area maybe one of them could suggest a better mechanic and sparky

[terravistawombat]

Hi I had a problm with my EGR valves when I bought the MU over 1 year ago.
The diesel mech I went to just pulled off the two vacuum lines where they join onto the EGR to test the results. The result was an immediate improvement in accelleration, smooth driving, and NO smoke.
The options were then advised to replace the EGR valves $300 to $400 Aus, remove the existing EGR valves and put covers over the inlets, or stick a ball bearing down the EGR end of the vacuum lines and re-connect the lines to look normal.
The ultimate choice will depend on a wallet vs. green appeal, or between a largish mechanical job to 30 seconds work inserting two ball bearings.
Cheers
Ian