[200q20v] Problems.. where to start? (very long)

Paul Waterloo pwaterloo at compuserve.com
Tue Nov 28 18:53:01 EST 2000

It sounds like the problem is a fuel leak into the engine and utilmately it
is stowed in the oil. The oil level is then over filled and it gets into the
combustion chamber, then you have all sorts of unburnt fuel in the exhaust
with a high amount of gas/oil going into the exhaust. This could be why the
cats plugged up. Can't remember if yours were wet and clogged or dry and
broken honey comb. Once they are plugged up, you're not gonna be able to
start your motor. Exhaust back pressure goes way up and you'll never be able
to spin the turbo produce boost. You mentioned no boost in your previous

So the problem still remains: how is the gas getting into the oil? The only
place it goes in is through the inlet manifold through the injector, right?
I don't think there is any other place it could leak into the engine. Maybe
you have a really bad injector that is just dumping fuel into the manifold.
Instead of plugging, it's leaking like a sieve. That would be something I
would be looking at. Have the dealer take the injectors out and do a spray
pattern into a jar, there is probably a procedure in the Bently. I don't
know if there is a cold start injector on a Motronic fuel system, but if so,
make sure it isn't leaking...

Make sure you have a free flow exhaust, if the new cats are blocked, you'll
never be able to start or idle the car. If it does idle, then it will have
no power if it isn't completely blocked.

Keep looking at the fuel system and where it is leaking....


Paul Waterloo
Applied Energy Services
Phone 708-524-9464
Fax 708-524-0079
Voicemail/pager 888-962-7304
pwaterloo at compuserve.com

----- Original Message -----
From: "-J J-" <fussball_3 at hotmail.com>
To: <200q20v at audifans.com>
Sent: Tuesday, November 28, 2000 4:29 PM
Subject: [200q20v] Problems.. where to start? (very long)

> Hey all,
> First off I just want to say thanks for all of the help you guys have
> me in the past. It seems though that i have come upon my biggest, and most
> flustering problem yet. A bout a week ago, I had sent an email out about
> catalytic converters needing replacement. I had that done, and also
> the distributor cap, because it had been cross firing. I noticed about two
> weeks ago (right when all of my troubles started) that my oil level was
> above what i had ever had in the car, it was really high, and i had not
> oil in for quite sometime. I thought this odd, but ignored it. Before the
> cats had been replaced, the car had been running really poorly: (this is a
> copy of my original message)
>    I have been having troubles with my 200 for the past 3 days. It started
> on thursday when we had heavy rains all day and night, and I did a lot of
> driving that day too. It was cold also, perhaps 40 degrees F. On the day
> was raining the car started very hard, and idled roughly, nearly stalling,
>   would have to give it gas to keep it from stalling. When i would start
> driving it would hesitate on acceleration. When warm it would run fine
> though. On friday i could not get the car to start at all. It would crank
> fine, so no problem with the battery, but it would not catch. Today it
> started hard again, I had to crank for 5 seconds or more. It is idling
> terribly now, it will stall even if i give it gas. I drove it for a bit
> it got better when warm, but then i just tried to start it 20 minutes ago,
> and the idle was worse than ever, and i didn't dare try to drive it for
> of stalling and not being able to start it again.
> ... That was my problem two weeks ago. After the new cats and new
> distributor it ran fine for a week. I even drove on a 200 mi. trip to
> Bend IN and back with no trouble. On the way back i experienced some
> surging, and my boost was low, and would not build up. I got home, and
> to start the car the next day- no start at all. My father and I tow-
> the car finally, it ran roughly and was smoking pretty badly, black smoke
> mostly, but sometimes white also. We decided to bring it to the dealer- a
> minute drive. On the way there, the smoking got worse, and suddenly the
> gauge began dropping visibly. I made it about 15-20 highway miles on 3/4s
> a tan of gas.. uh-oh. We stopped at a gas station, and filled up. No start
> at all. I had to two the car to the dealer. Today the dealer worked on it.
> They have no idea as to what is wrong. They did a compression check,
> on all cylinders, (if that helps at all.. ) The strange thing is that they
> found fuel in the crankcase oil. This explains the high-oi l problem.
> But now, what should I do? I have no idea as to what is wrong, the dealer
> stumped. I need some input! Any ideas would be great. BTW I installed a
> Hoppen ECU from Keith a little more than two months ago, would this cause
> anything to happen like this?!? Sorry the message is so long, but i just
> wanted to be thorough. Thanks guys!!
> John Gronberg Jr.
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