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Old January 15th, 2009, 21:23   #1
acomp
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Default 2000 tdi wont start

I was driving my car in a parking lot when it started to rev really high so i shut it off. when i tried to restart it it would turn over but it wont start. what could it be?
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Old January 15th, 2009, 21:31   #2
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How long did it rev really high? Was there lots of black smoke pouring out the tailpipe? Have you checked the timing belt?
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Old January 15th, 2009, 21:33   #3
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Fuel starvation? Can you see bubbles in the visible fuel line up front?

Run-away is possible, when was the last time you drained the IC? Cleaned the intake?
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Old January 15th, 2009, 21:36   #4
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There was a huge smoke cloud and it revd for about 2 seconds before I killed it
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Old January 15th, 2009, 21:45   #5
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What is the oil level? Sounds like somehow, a bunch of it got into the intake and cylinders. This can cause starting problems as the injectors are spraying into a puddle of oil in the piston bowl instead of swirling around.

Pull a glowplug. If wet with oil, insert a piece of 5mm Tygon tube until it touches the piston. Check for oil on the tube. If wet, a Shop Vac set for wet pickup can suck some out. Make a manifod so all cylinders can be vacuumed at the same time. Spin the engine with all GPs out for the rest but put towels over the holes to catch the spray. Drain the IC, clean the intake tubes/hoses completely.

Now where did the oil come from? Turbo? Or crankcase breather? If the latter, clean the demisting pads located in the valve cover. I've posted this recently, it is easy but messy.
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Old January 15th, 2009, 22:06   #6
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Keith is right on as usual. I would add you should pull the lower intercooler hose and drain out any extra oil, then pull the hose off of the turbo that goes to the intercooler and see if the bearings there are whacked.

It could be that oil has pooled in the intercooler and it got sucked into the enigne and ran unchecked for a few seconds.

But why won't it start now?

Did you check the antishudder valve?
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Old January 15th, 2009, 22:13   #7
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Quote:
Originally Posted by whitedog
Keith is right on as usual. I would add you should pull the lower intercooler hose and drain out any extra oil, then pull the hose off of the turbo that goes to the intercooler and see if the bearings there are whacked.

It could be that oil has pooled in the intercooler and it got sucked into the enigne and ran unchecked for a few seconds.

But why won't it start now?

Did you check the antishudder valve?
The starting mode (DBW) will not let more fuel in. The tiny bit of fuel injected will be quenched by the thick film of oil on the bowl of the pistons. In running engines, the diesel mist bounces off the dry piston bowl, very little "wets" the piston until it gets to temp within a few seconds, then it evaporates. The engine is cold now and the coating of motor oil effectively prevents the ignition.

I would NOT recommend ANY starting fluids, ether or propane. That is asking for another run-away.

Fix the problem first, that being how that oil got into the intake. But for a 2k, if the turbo is fine, bet on oil mist. CLEAN IT.

This isn't a complex fix but it is detailed. If you don't want to pull the belly pan, side skirts, valve cover, front head light, IC and all tubes, expect to pay $1600 for this, Canadian. There, that and a warm garage should be all the motivation you need.

We will be here. Rememeber, if the women don't find you handsome, they should at least find you handy. Red Green, my kind of man.

Last edited by Keith_J; January 15th, 2009 at 22:16.
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Old January 15th, 2009, 22:16   #8
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Quote:
Originally Posted by Keith_J
The starting mode (DBW) will not let more fuel in. The tiny bit of fuel injected will be quenched by the thick film of oil on the bowl of the pistons. In running engines, the diesel mist bounces off the dry piston bowl, very little "wets" the piston until it gets to temp within a few seconds, then it evaporates. The engine is cold now and the coating of motor oil effectively prevents the ignition.

I would NOT recommend ANY starting fluids, ether or propane. That is asking for another run-away.

Fix the problem first, that being how that oil got into the intake. But for a 2k, if the turbo is fine, bet on oil mist. CLEAN IT.
I like that idea. Too much liquid in the combustion bowl to get good sqwirl.
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Old January 15th, 2009, 22:18   #9
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Im not totally sure that it was burning oil, it was more like thick diesel smoke due to the high revs. Im no where near my car at the moment I will check the anti shudder valve and fuel lines and glow plug for oil in the morning.
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Old January 15th, 2009, 22:26   #10
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Quote:
Originally Posted by acomp
Im not totally sure that it was burning oil, it was more like thick diesel smoke due to the high revs. Im no where near my car at the moment I will check the anti shudder valve and fuel lines and glow plug for oil in the morning.
Well, SOMETHING was causing the engine to race. Yes, oil WILL burn nicely in a diesel without much of the black smoke because unlike a gasoline engine, there is far excess air. In a gasoline car, the oil cannot burn because there is insufficient oxygen so the oil just becomes a white vapor cloud. But in a diesel, there is plenty of air and oxygen so those hydrogen atoms on the hydrocarbon that is oil are easily stripped off, using all the oxygen available. Since the carbon backbone of the oil molecule is now "bare", you get black carbon smoke.
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Old January 16th, 2009, 11:20   #11
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Ok so I checked it out at the parking lot and there isn't any oil in my engine and the anti shudder valve seems to be functioning properly. there is a single bubble in the clear fuel line however.
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Old January 16th, 2009, 11:27   #12
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Quote:
Originally Posted by acomp
Ok so I checked it out at the parking lot and there isn't any oil in my engine and the anti shudder valve seems to be functioning properly. there is a single bubble in the clear fuel line however.
Something caused it to go uncontrolled. If not a run-away from oil in the intake, it has to be electrical between the power control module, the ECU and the injection pump.

If there is no oil in ANY of the cylinders, then there is no fuel through the injectors.

Double check crankcase oil level. Then scan for faults.
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Old January 16th, 2009, 11:33   #13
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Quote:
Originally Posted by acomp
Ok so I checked it out at the parking lot and there isn't any oil in my engine and the anti shudder valve seems to be functioning properly. there is a single bubble in the clear fuel line however.
Do you mean that you pulled the dipstick and there was no oil? If so, I would not try to run this until you can get it someplace warm and do some in depth checking.

The single bubble is normal and it shows that there is fuel there.
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Old January 16th, 2009, 11:36   #14
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It was at a normal oil level on the dipstick, there wasnt any oil in the cylinders that I could see.
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Old January 16th, 2009, 11:40   #15
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Quote:
Originally Posted by acomp
It was at a normal oil level on the dipstick, there wasnt any oil in the cylinders that I could see.
OK. My misunderstanding. Carry on.
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