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Volkswagen TDI Models

2478 messages,  Last post on Nov 30, 2009 at 9:34 AM

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What is this discussion about? Volkswagen New Beetle, Volkswagen Golf, Volkswagen Jetta, Volkswagen Passat, Diesel, Hatchback, Sedan, Wagon


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#2370 of 2478
Re: Stalling? [sgunde] by bpeebles
Aug 23, 2007 (4:26 pm)
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Replying to: sgunde (Aug 23, 2007 10:07 am)

I usually have some kind of answer or advice for technical issues... but I have never ever even heard of a TDI just quitting like that.
 
For this odd problem, perhaps you may want to try the TDI club
#2371 of 2478
Re: Stalling? [sgunde] by elias
Aug 25, 2007 (7:37 am)
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Replying to: sgunde (Aug 23, 2007 10:07 am)

yes there is at least one case of this same problem described on tdiclub. i think the dealer traced it to:
clogged fuel-return-line.
#2372 of 2478
Re: Stalling? [elias] by bpeebles
Aug 26, 2007 (4:27 pm)
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Replying to: elias (Aug 25, 2007 7:37 am)

I have been thinking about this stalling problem and with the TDI engine, there is no "ignition" at all. This kinda points to the problem being a fuel-supply issue.
 
It is not uncommon to get a small airleak in a fuel line. Most of the time, it is harmless or you may observe som airbubbles in the clear fuel line between the filter and the Injectionpump. It is possible that the Injectionpump can "suck air" and the engine would stall out.
 
One easy thing to try is to simply replace the fuel-filter and MAKE CERTAIN that all the hoseclamps are snug and BOTH of the O-rings are installed properly and in the correct location. (The 2 O-rings appear to be the same but are intended to be installed in different locations.)
 
I am thinking by doing the above, the stalling problem will be resolved.
#2373 of 2478
Re: Stalling? [bpeebles] by pludlow
Aug 27, 2007 (3:54 pm)
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Replying to: bpeebles (Aug 26, 2007 4:27 pm)

I haven't experienced the stalling but have some thoughts about the possible culprits: The fuel shutoff is electrical and could be that a poor connection is causing the problem during acceleration (negative); or another possibly related problem is there seems to be a "throttle" cutoff associated with braking, as I have tried powering the engine to test or dry the brakes only to have the "throttle" cut back.
 
Hope this helps.
 
Pete
#2374 of 2478
Re: Stalling? [pludlow] by bpeebles
Aug 27, 2007 (5:38 pm)
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Replying to: pludlow (Aug 27, 2007 3:54 pm)

You are correct that the TDI (and most other fuel-injected cars) will cut the fuel to the engine during decellation. This is to improve MPG and reduce tailpipe emmissions.
 
As for the "cutoff" with the brakes on... you are only partually correct. It is actually a specific RPM limit when brakes are applied.
 
To prove it to yourself, try this -- while sitting in neutral put left foot on the brake pedal and then use right foot to bring engine RPM up... you will notice that the engine WILL NOT GO PAST a specific RPM while the brake is applied.
 
I still would replace the fuel filter if it were my TDI stalling. It would be a cheap way to "shotgun" the problem with more than 60% chances of success.
#2375 of 2478
Re: Stalling? [bpeebles] by sgunde
Aug 28, 2007 (10:06 am)
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Replying to: bpeebles (Aug 27, 2007 5:38 pm)

Thanks alot guys, I told the service advisor what you said. They were not sure what to look for, they were going to replace the mass-air sensor. Volkswagon did not have any ideas either. I'll keep you informed. Shane
#2376 of 2478
Re: Problem at 2500rpm [fozzygolf] by robmel
Sep 04, 2007 (7:59 am)
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Replying to: fozzygolf (Jan 25, 2007 5:52 am)

Hi there I too have a GT TDI 130 golf and been experiencing a judder at about 2500rpm. It then carries on when you accelerate to about 3000rpm and then is fine...Did you manage to get to the bottom of this problem as im fearing the worst...thanks
#2377 of 2478
Re: Problem at 2500rpm [robmel] by anteater
Sep 07, 2007 (3:19 pm)
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Replying to: robmel (Sep 04, 2007 7:59 am)

If you haven't replaced the filter, I wouldn't go searching for a MAF yet. I have an '06 TDI Jetta (way cool) the only problem in 15k miles was a bad batch of fuel from a cheapo station. Mine shuddered and ran like crap. I replaced the filter and all is good. If you do need a MAF, go to TDICLUB.com and check out some of posts re: MAF. Both are easy to change and the members freely provide detailed instructions with photos. Great site!
 
Mine has 109HP and 178 ft.lbs torque and up to 42MPG 80 MPH - and it's plenty fast. Lucky 07 TDI shoppers, the 08 1/2 Jetta TDI will have 140HP and nearly 200 ft.lbs torque and better mileage. I wish I could have waited.
#2378 of 2478
Re: Problem at 2500rpm [anteater] by bpeebles
Sep 07, 2007 (6:42 pm)
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Replying to: anteater (Sep 07, 2007 3:19 pm)

Ahh... but I like the 58MPG on the highway (with AC on!) that my TDI delivers. I would be very surprised if that 140HP motor can acheive that.
 
I have never been "wanting" for more power in my 2003 TDI. I "drive the torque curve" and it can outperform many other cars... especially passing power.
#2379 of 2478
Re: Problem at 2500rpm [bpeebles] by ruking1
Sep 09, 2007 (9:02 am)
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Replying to: bpeebles (Sep 07, 2007 6:42 pm)

I have put over 98,000 miles (a baby for some veterans) on the 2003 Jetta TDI, and I am still amazed at its inherent capabilities (given 90 hp and 155# ft of torque).
 
Not too many areas in the continental USA exceeds the altitudes of the Rocky Mountains. Literally the TDI runs like a mountain goat in this performance parameter and range. (forgive the juxtapositions of metaphors here) The nexus of course if it can run well there, almost anywhere else is by definition: "down hill".
 
I was amazed at the mpg going from sea level to 6500 feet. I was particularly amazed from 6500 feet to 2000 feet!! 584 miles, 12.1 gals, travel time 6.25 hours, 48.26 mpg!!!!! It is amusing to get those surprised quizzical looks from V8 drivers during pull away.
 
(Durango, CO to Las Vegas NV, for those who want to mapquest)
 
http://www.laplatadiscount.com/Durango/Reference/tips.html
 
..."Did you know? About three-quarters of the nations land above 10,000 feet is in Colorado. Estimates place more than half of Colorado above 5,280 feet."...
 
Yet in listening to folks who have these types of machines in Europe; such as Alltorque's Skoda examples, it becomes apparent that the USA market get the "less powerful version" (90 hp vs 100 to 110 hp). They also get another gear, (6 speed vs 5 speed)that can also wring out 2 more mpg, if they do not demand the extra hp and torque.

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