Driving with disconnected ISV?

Nedavno Steve Sears pise:

| The system in the 1987 Audi 5000 Turbo/200 used a deceleration valve,
| the failure of which could result in the engine stalling (it cuts the
| fuel delivery off to the engine when the car decelerates, thus
| reducing fuel consumption) - but that is for the fuel system, which
| your LPG system is not using.

Yes, but from:

http://www.sjmautotechnik.com/troubl...sys.html#decel

"These valves have been known to stick open and then not shut when the
RPM drops below 1200 which causes the big vacuum leak and the stalling"

So if deceleration valve is not completely stick, but slow in response
(close to sticking, but still works) I would have vacuum leak. I do not
knew if this is possible.

| There's a Russian web site that has all
| the parts diagrams

Yes, I knew, I found it some time ago, its:

http://www.elcats.ru/audivw/nn/

I was searching there and on page:

http://www.elcats.ru/audivw/nn/vag4....1988&cyl=&vol=

when you click on nine-th item from the top, and then on the button
below the picture on the left, (NF engine) there is no decel valve. But
if you click on the eighth item from the top and then on the button
below the picture on the left, (MC engine) there is one. So it seems
that I do not have one.

What about EGR valve? Where is it? I can not find it either on Russian
site. Do I have it? Can that be the problem?


| I think you should give all of the
| intake hoses a real close check for cracks or leaks - also in the
| connections between the LPG system and the car's original system hoses
| - the underside of the intake hoses rots out first due to oil from the
| crankcase recirculation (and turbo leaks). When the car is idling,
| the intake is under a vacuum and may cause an intermittent leak in a
| broken hose - changing the fuel/LPG mixture and thus the idle.

I already checked intake hoses. Only breather hose was broken, and I
replaced it.



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