Last post on Nov 17, 2013 at 8:38 AM
You are in the Volkswagen Jetta
What is this discussion about?
Volkswagen Jetta, Biodiesel, Diesel, Sedan
#1668 of 4777 Re: potential VW 2005 jetta tdi owner [michael1964]
Jan 24, 2008 (4:30 pm)
One other item I should mention. Fuel additive. I use Powerservice Diesel Kleen + Cetane Boost. 4oz in every tank. Available at Wal-Mart. Not expensive and well worth the cost. If you are in an area where the temperature goes below 20F you'll want to use Diesel Supplement. Diesel will gel below 20F, DS has an anti-gel in the blend. If Powerservice not available, check auto parts stores. They should have something comparable.
#1669 of 4777 Sluggish '05 TDI
Jan 25, 2008 (6:13 pm)
I've noticed that over the last few month my '05 TDI (old body) has been very sluggish at RPM's above 2000. I have almost 0 passing power. I tried using fuel additives, which helps but only short term. I've also experimented with fuel from different sources, also with no help. I've got an appt. with the dealership for next week, but just wondering if anyone else has experienced anything similar and what possible causes there could be.
The car has just over 30,000mi on it, and I've kept up on oil changes (with 505.01 approved oil) and even changed the air filter 2 times in the last 20k miles.
#1670 of 4777 Re: Sluggish '05 TDI [inlarry]
Jan 26, 2008 (6:46 am)
leisure suit inlarry, fuel filter? Seems like the 20k fuel filter interval is a bit optimistic - one half-crappy batch of fuel my 06 has no power on the highway, and maybe stumbles too. (is yours stumbling or very smoothly having no power?)
some TDIs were prone to MAF issues that would give the symptom you describe. a test for that is to unplug the MAF - if performance improves than a new MAF is necessary.
also, sounds like your car is under warranty - why not let the dealer have an actual mechanic try diagnosing?
#1671 of 4777 Re: Sluggish '05 TDI [elias]
Jan 26, 2008 (7:20 am)
Yes I would agree!! Let the dealer do it under warranty. Let us know what they find out.
#1673 of 4777 Re: Sluggish '05 TDI [ruking1]
Jan 26, 2008 (8:24 pm)
Oh, I intend to let the dealer find out the problem, I was just wondering if any other TDI owners had experienced similar issues. I've never had a car with such issues at such relatively low mileage...I mean my '89 Benz with almost 200k miles is still smooth as silk with plenty of power and has had nothing major replaced that I'm aware of.
As I mentioned, I tried some PowerService DieselKleen additive, which helped, but only short term (which was confusing). As for the question about the performance, the car is smooth until I hit ~2000RPM and remains smooth as long as I don't depress the pedal past maybe 1/4....at which point there is no power, the car feels like it does a bit of light jerking, etc. I can't even max out the tach with the car completely out of gear...completely in neutral the engine tops out 500RPM below redline and declines further from there (to up to 1500RPM below redline during the few seconds I was willing to test that theory).
The other reason I'm asking for info from other owners is I want to know somewhat of what to expect from the dealer...mine seems to have a habit of "oh sorry, looks like we can't find an issue" or "well looks like there's been this done elsewhere, sorry but we can't help. Take it back to the other shop" syndrome.
#1674 of 4777 2001 jetta tdi tensioner roller
Jan 27, 2008 (4:41 am)
had the timing belt an all related parts replaced dec 27 2007....15 days later
the tensioner roller spring snapped off......(back side of factory part looks cheap)
so ..had the factory part replaced jan 15....same part broken again jan 26..
its a great car...but high maint...im now checking for after market tensioner.
any comments welcome
#1675 of 4777 Re: 2001 jetta tdi tensioner roller [chevy49]
Jan 27, 2008 (10:40 am)
Hmmm, one tensioner I can believe going bad even though it's rare. Two? Almost sounds like an install problem or other issue. Is this a dealer? They're not usually the best at timing belts on TDI's.
#1676 of 4777 Re: Sluggish '05 TDI [inlarry]
Jan 27, 2008 (1:09 pm)
As stated before, if I had to guess, it would be the MAF. In addition anyone one anywhere anytime can get a batch of bad fuel.
#1677 of 4777 Re: 2001 jetta tdi tensioner roller [chevy49]
Jan 27, 2008 (5:59 pm)
I would put my bet on the possibility that the tensionor was INSTALLED INCORRECTLY. There are several websites which discuss that the possibility that the tensionor can be installed in such a way that the spring is overwound. This has resulted in the type of failure which you describe.
This is one of the MANY reasons it is highly recommended to have a SKILLED, KNOWLEGABLE and EXPERIENCED person perform the delicate task of replacing the timing belt and related components. (Most VW dealships do not fall into this category because they do not work on TDIs very often)
I would also bet money that you will NOT find an aftermarket tensionor for a TDI engine. The VW-supplied part is very reliable when installed properly.