HELP SOS broken TDI!!!

i was driving today on the freeway when i hit about 60 i lost engine power and when i hit the pedal thick black smoke would come from the exhaust pipe. When i pulled over my engine entirely shut off after that it would not start. Any ideas???

TaylorM said:

i was driving today on the freeway when i hit about 60 i lost engine power and when i hit the pedal thick black smoke would come from the exhaust pipe. When i pulled over my engine entirely shut off after that it would not start. Any ideas???

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Blown turbo. Check to see if your oil is low.

Also, let us know what year this car is. It could be a multitude of things, few of them easy fixes. Timing belt failure would be the first to come to my mind.

-Rich

TaylorM, please edit your initial post and include the necessary data such as year, model, transmission and when the last major maintenance was done, i.e. timing belt. Without this its like guessing what will happen in 10 years.

Taylor's ride

According to public profile Taylor has a 2001 Golf. He does not know the mileage, transmission, or any maintenace done! Give an update on vehicle Taylor so people can help you!

Black smoke is excess fuel. blown turbos blow thick white clouds. A. Blew off intercooler pipe. B. Blew a hole in a pipe. C. Blew the injection pump.

Agree with JasonTDI also check antishutter valve...after his a,b,c then check Timing Belt.

sorry, kinda frazzled today. Ya its a 2001 1.9 with 74k miles with an AFE cold air intake, straight pipe/catectomy and a high flow turbine muffler. Just had the timing belt replaced last month along with a new water pump, towed it to the mechanic today. they looked the Timing belt which was fine, no oil in the intercooler tube. Oil was fine. A friend of mine who works on TDI's told me to check the main fuse and the battery cables that maybe the ECU shorted. Looked at the fuses on the battery terminal and they were fine, no dash lights
came on. We are all kind of stumped. The mechanic is going to plug it in to the diagnostics tomorrow and see if its an ECU problem, i am kinda leaning towards the blown turbo, when i was driving it felt like something gave or blew up, I was going about 60 when it gave i saw the smoke out my back window and it looked black or maybe gray, but would a blown turbo cause the car not to start? any way to check if the turbo went? My second guess is what jasontdi stated above about the injection pump i could see why it wouldn't start if the injection pump went out. Really pissed off i have only had the car maybe 2 months. Bought it cuz i have heard so much good things about TDI's plus my dad is a fireman who lived his whole life driving turbo diesel fire engines. From what i heard it sounded to me like diesels were bulletproof. The good part about this whole mess is my friends dad owns the shop and i have a third party warranty, i might get them to put in a bigger/better turbo instead of stock under warranty if it is a blown turbo *crossing fingers* YAY! I was looking at the VNT15 any other recommendations on turbos?

You can probably rule out the ECU, I have never seen one of those go bad on a MK4...

VNT15 is stock bro

BleachedBora said:

You can probably rule out the ECU, I have never seen one of those go bad on a MK4...

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I have. It was a "soft failure" as it went into limp mode. Very little power but it would do 40 MPH.

Turns out it was a failed solder joint on the output stage of the N75 circuit...freewheeling diode on the MOSFET. Unfortunately, the built-in FW diode was over-stressed and that IC is not available to us peons. I had it fixed and it returned when it gets above 90 F.

This is clearly not the case in Taylor's car. It COULD be a failing IP. Or bad fuel. Gasoline will ruin an IP as well as cause smoke due to delayed ignition.

well i have def never put gasoline in it. I put bio20% in it one time but i dont think that would cause this. Ya sorry vnt-15 is stock, i meant VNT-20 or 17. Im kinda hoping its not a fuel system related issue cuz i just pulled out my warrany and read it over and fuel system stuff isnt covered. I installed an aftermarket stereo and speakers and lights but there is no way that would mess with the ECU right? I was just remembering too that when i filled up last i topped it off pretty much to the cap that wouldnt cause that i dont think. I also just got the exhaust mods done but im pretty sure that wouldnt cause it either. Im stummpted, im hoping my mechanic can figure it out tomorrow. i dont really wanna take it to the dealer cuz i hate the dealer more than i hate communists. They will probably say i need a whole new engine and want to keep my car for like a month then give it back to me and tell me that it was due to my windsheild wipers or something.

It's really common to see inj pumps crapping out lately. Especially this winter. Mixing down fuel to winter blend must be lowering lubricity more than the addative package can handle destroying the pumps. I've NEVER seen more pumps fail at a time than this winter. I've rebuilt 14 pumps since November.

Take it to Harv in Fullerton.

When you get it back running, ditch that useless "cold air intake". The stock system is better. These are tough engines when maintained and not abused. But to lump all/any diesels into the "bulletproof" catagory is unfortunate, especially when you start to mod things.
Carefully check for any air intake plumbing (especially post turbo) that may have come disconnected/broken and as suggested the anti-shudder flap/valve stuck shut post shut down.

jasonTDI said:

It's really common to see inj pumps crapping out lately. Especially this winter. Mixing down fuel to winter blend must be lowering lubricity more than the addative package can handle destroying the pumps. I've NEVER seen more pumps fail at a time than this winter. I've rebuilt 14 pumps since November.

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Only Taylor is in Los Angeles.

The reason I stated gasoline contamination is this MIGHT be an issue with a fuel mixup at the station's tanks. It was with mine, I had the fuel receipt and there was NO WAY I could have pumped gasoline.

Yet the fuel in my tank was about 1/4 gasoline!

Yes, I was compensated for cost, time and trouble.

My car did this once. The plunger seized in the HP stage of the IP and broke the wobble plate. Everything looked fine from the TB side, but no squirt from any injector.
Crack an injector line and see if you get fuel, assuming timing is still ok.
Already eliminated Relay 109 issues? You'd have no communication with the ECU if that was a problem.

Check boraparts.com.

Get it repaired at DFIS normally for around $600.

$600 for a reseal and some other small stuff. If a QA is involved as it often is it's a grand.

While possible, I would seek another opinion regarding the pump. This would be a VERY expensive fix if it isn't the problem.

-Rich

You can usually find a used ALH pump for about $400 (give or take)...

As auto_tech said, crack open an injector line and see what comes out when you crank the engine...

Yuri.

could also look on the brightside if it is the IP can get an 11mm installed

2000 Jetta TDI, Mine stopped too!

I was also driving down the highway, car then just switched off, lost power, and turned but wouldn't start. 3 yr old timing belt, good records, etc...
No tdi mechanic close so it's at local mechanic who work Audi, VW, etc... forgein cars. we switched out the 109 realy swithc, but nothing. So he checked the fuel coming in, said no diesel coming to injectors, thinks it's the diesel pump...What do you experts think? It's very concerning to have this guy who's not a TDI specialist looking at it... I would REALLY appreciate your feedback!

Thanks!

d2305 said:

Take it to Harv in Fullerton.

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He moved his shop to Whittier. I'd see him over any other mechanic.

calidg said:

I was also driving down the highway, car then just switched off, lost power, and turned but wouldn't start. 3 yr old timing belt, good records, etc...
No tdi mechanic close so it's at local mechanic who work Audi, VW, etc... forgein cars. we switched out the 109 realy swithc, but nothing. So he checked the fuel coming in, said no diesel coming to injectors, thinks it's the diesel pump...What do you experts think? It's very concerning to have this guy who's not a TDI specialist looking at it... I would REALLY appreciate your feedback!

Thanks!

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Go through whitedog's no start thread. Sounds like a fuel delivery problem to me. It is a sticky in this same forum.

what is DFIS??

ymz said:

You can usually find a used ALH pump for about $400 (give or take)...

As auto_tech said, crack open an injector line and see what comes out when you crank the engine...

Yuri.

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Ok well fuel came out of the injector line when it was opened. I keep hearing you can get used pumps for around 400-600$ where!!! i need to be pointed in the right direction because i cant find crap when i google it!!!

TaylorM said:

what is DFIS??

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think that is the name of a place that rebuilds them.