06 jetta tdi turbo lagOn 25.10.2020 by Vudozragore
Troubleshooting Turbo Boost Issues. SKU: Boost. Qty :. Add to Cart Add to Wishlist. The turbo is a vacuum modulated device. When more vacuum is placed on the actuator, the turbo develops more boost. By modulating the amount of vacuum the turbo actuator gets, the ECU is able to control boost pressure.
When the ECU cannot control boost pressure, the actual boost deviates from the specified boost. When this occurs, the ECU reduces fueling and requested boost to ensure that the turbo is not damaged. We will now cover the potential causes of this situation. Some of these procedures may exceed your level of mechanical competency, and should be left to an expert with a strong TDI background. Cause 1 boost leaks. A boost leak is a hole in the intake track between the intake manifold and the compressor outlet of the turbo.
This portion of the intake is under pressure when the engine is loaded. If there is a hole in this part of the intake track, boost pressure will leak out, and the MAP sensor boost sensor that sends a signal to the ECU reporting boost will not be able to accurately report on the turbo's behavior. Boost leaks are typically accompanied by a hissing or whistling noise. The area of the intake track that is leaking will typically be covered in a jet black oily film.
This is oil that seeps past the turbo's oil seals, and within reason, is completely normal. Inspect the pressurized portion of the intake track for leaks, and remedy it as necessary. Cause 2 mis-adjusted VNT actuator. The VNT actuator is the device on the turbo that has a vacuum hose attached to it. It is sort of ball or can shaped, and has a rod sticking out of it. The computer coding is written around a specific rod length.
If the rod is the wrong length, the turbo responds differently than what the ECU is expecting, and boost control will suffer. Actuator rod lengths are often times set incorrectly by OE manufacturers of turbos. In order to test and adjust the actuator length, you will need a hand vacuum pump; available at most auto parts, department, and tool stores.
2006 Volkswagen Jetta TDI Tested
A popular brand is MightyVac. These pumps are actuated by hand and have a vacuum gauge that reads inHg. Begin by lifting the car with a quality jack and supporting it with jackstands on a solid surface.
Do not use your tire changing jack.
Such a jack is not safe enough to allow under car work. These are nicknamed widowmakers for a reason. Depending on your engine compartment layout, it may be possible to adjust the actuator from the top, but it's easier to see what you're doing if you go at it from below.
Remove the belly pan if equipped. Find the turbocharger. It's bolted to the cylinder head. The exhaust side exhaust manifold will likely be rusty if it's been on there for a while, and the intake side compressor housing will be bare aluminium. Between the two housings lies the actuator and actuator rod.
Remove the vacuum line attached to the actuator. In some cases it simply pulls off the nipple, although often times it is attached with a occasionally stubborn to remove steel clamp.Hesitation at takeoff User Name Remember Me?
Turbo lag? Hesitation at takeoff. I love it! But what I don't love is that when I'm stopped and I step on the peddle expecting it get up and go in front of that on coming car, my car takes about 5 seconds to respond. Is this turbo lag?
Is there a way around this? I've heard of spooling the turbo, but not sure what that means or how to do it or if that is what is needed here. I'm really enjoying the forum, BTW. Five full seconds??
That is excessive. Is it a DSG or a manual transmission? Its a dsg.
I suppose it may not be 5 full seconds. But its not pulling away at speed. The DSG takes a bit of getting used to, particularly when accelerating from a stop. If you just romp on the pedal, it will be sluggish. Try rolling onto the throttle and keep in mind that the DSG is basically an automated manual transmission, so it needs to engage the clutch like you would on a manual. It doesn't just go like a conventional automatic. With a little practice, I think you will be happier with it.
The clutches have to have time to engage. At a pace of one count per second, count to five the next time you are in a situation to want to start off quickly. Then get back to us with the actual time. Also, learn to feather the go pedal rather than pushing it to the floor. You will start of just as fast. Ok, will do. But I will keep working it and see what I get.
I have pushed it to the floor on more than one occasion with very slow response.User Name Remember Me? Turbo Lag? I have a TDI and I notice that when accelerating through the gears shift points that the acceleration lags for a second or so once I hit the next gear then picks back up.
I'm assuming this is caused when you let off the fuel and come off boost it takes a second to build boost again.
Am I right and is this normal? The car has K miles runs great and is stock exept for mufflerectomy. I have several other turbo diesels and they don't experience this to a noticable degree.
Also thinking a tune will minimize it. Last edited by mudduck; March 26th, at Reason: omission. Sounds like turbo lag to me.
My car does the same thing, although in it's previous life with an automatic transmission it was not nearly as noticable. With the 5 speed there's not all that much you can do about unless you don't mind shortening the life of your transmission's syncros. The 02j is not well suited to ultra quick gear changes.
That's what I thought but since I've only had the car 8 wks 5k miles I thought I'd ask. Hope my car lasts as many miles as yours. Shifting at would put you back into prime turbo revs with enough air volume moving to get boost pretty quickly. This relies on vacuum and a friction free movement to operate correctly. You can test its operation with the car off by connecting its vacuum hose to a hand held "Mity Vac" to see if it starts moving directly with vacuum application.
Best, Cory. It's not running right anyway that's for sure, you shouldn't get any lag with the ALH. I bought the car from a TDI club guy and all the vacuum lines have been replaced. Also intake etc. The car runs great in all other aspect and pulls all the way to the redline. I only notice the "lag" when in the one situation I described. I wonder if I am not on the pedal hard enough to "request " full boost right away. I'll do some more experimentation! I will check the VNT for smooth operation.
Like I said the car runs great so not a big issue at this point. The only TDI I drove to compare it to was the chipped and nozzled wagon the previous owner had Last edited by mudduck; March 27th, at I've driven standard and tuned ones and never really ever come across much in the way of lag except when there was a problem.
If all else is good I'd be inclined to check the turbo isn't sticking at all. It's only a little blower on the ALH anyway. I've heard of a little bit of lag on the likes of the PD's but they have a bigger turbo and a front mount.
Anyway yeh, only time I've come across lag on the likes of the ALH is when there's been something wrong, sticky vanes, leaking vac line etc. Take it for a spin, if that fixes the problem, you have a sticking EGR. I had a Jetta TDI auto, it had horrible turbo lag.
I never could get used to it.I bought a new jetta TDI last summer for my 16 year old daughter to use through high school and hopefully college. I hadn't driven it hardly at all until about a month ago. When my wife and I took it on a trip to the city, I discovered a serious safety issue.
We were attempting to turn left from the center turn lane across heavy traffic and nearly broadsided because the car wouldn't go. During fast acceleration, the car has a serious lag, sometimes, buy not always. I found myself even pumping the accelerator to get it moving. This doesn't help anyway. I took the vehicle directly to the dealer to have it checked.
After about a hour they brought it out and told me nothing was wrong. They put it on the computer and found no problems, just normal turbo lag. I have had several turbo diesel pickups, Chevy duramax's, and also many turbo diesel tractors with no experience of turbo lag. I had my 23 and 20 year old sons start driving the car and they both experienced this problem.
So I took the car back to the selling dealer. They had the car for an entire day and could find nothing wrong. They said they checked with the factory and it is just normal turbo lag. Anyway, my daughter is not allowed to drive the car now, as a matter of fact she is driving a new jeep.
The car has about 12, miles now. As I said this doesn't occur every time you accelerate. Also, it seems to be more prevalent when it is hot and humid out, but I am not sure. It is very frustrating. It is my first and last VW. I wish I had stayed with American. The car won't have any power till around rpm. Is this car a DSG by chance?
Turbo lag is essentially zero on a modern diesel. My point is that there is a difference between lag and spool time. Bob is right, there should be zero lag. But there is going to be a set threshold you have to cross before you find the spool time removed. Your exhaust won't physically flow enough air to operate the turbo till around rpm. So we need a detailed description of the "lag" to tell you if it's normal or not.Hello, Sign In! Your Andy's account is now active and you're logged in.
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Troubleshooting Turbo Boost Issues
Not able to find what you are looking for? Most turbo-equipped vehicles are also quieter due to the turbo itself acting as a sort of muffler. Boost can become an addiction.
If you have ridden in a car with a turbocharger then you have probably felt the incredible surge of power as the motor comes into the boost range. The result is a large increase in intake pressure and more power when additional fuel is also introduced into the combustion chamber. The turbocharger is essentially a compressor that is driven by engine exhaust. The exhaust spins an impeller with a turbine on the end that compresses air into the intake manifold generating boost.
This design is extremely popular on modern vehicles, but its history goes all the way back to when a Swiss inventor patented the first turbocharger. In the early years turbos were popular on aircraft engine because they helped negate some of the power loss form operating at altitude. Today they are used in numerous applications from drag racing to long haul trucking. These little power boosters have really proven their worth. Q: How do you install a turbo kit?
A: Turbochargers should be installed by professionals if you have no experience with turbo installations. If you've done the basic bolt-on performance modifications to your car intake, header, exhaust and know your way around your engine, then you might be capable of doing the install yourself.
Normal installation depending on the vehicle takes around hours in most cases, but depends on whether custom work needs to be done. The turbo manifold that comes with the kit replaces the factory exhaust manifold.
The turbo doesn't replace anything assuming this is a turbo kit and not a turbo upgrade kit. The turbo is mounted to a flange on the turbo manifold. Remember the turbo is spooled by the exhaust gases, so once the gases pass through the turbo manifold, it spools the turbo. Q: Is there a pre-condition my vehicle needs to meet in order to be able to handle a turbo kit?
A: Any vehicle can be turbocharged but you must consider whether all of the engine, driveline, and chassis parts can handle big power increases. Most aftermarket turbocharger kits for naturally aspirated cars recommend running no more than psi to prevent engine damage. Q: What do turbo kits come with? A: Complete turbo kits normally include the manifold, turbocharger, intake, down pipe, fuel management unit and all lines and hoses needed. You need to purchase intercoolers, piping, blow-off valves separately in most cases, unless otherwise noted in our product descriptions.
Q: What is a turbo kit?Acceleration Lag. As I push down on the accelerator it lags until I release and then press again and it takes off. Anyone else experience this "problem". Certified Volkswagen Nut Vendor. TDI s : There are just too many to list A reflash will wake it up!
Lots of heavy beast to get moving, the engine needs to get up on boost a little to get through the slushbox to get it going. Find More Posts by oilhammer. Loose Nut Behind the Wheel Vendor. Seems to be a common complaint among many owners after the "fix".
It likely has to do with more aggressive EGR duty cycles with the software update. Boost will ramp up much more effectively once at least the high pressure EGR is told to close. Could always unplug the high pressure EGR valve and go for a spin, see how much difference it makes in response. Or, you know, a tune does fix that One man operation, email is preferred method of contact: email me with inquiries for service.
Troubleshooting Turbo Boost Issues
Thanks for the reply's. However I'm sorry "oilhammer" but I'm only a shade tree mechanic and don't know what a reflash would entail. What do you mean by a 'tune", id hate to void any warranty since I only have 54, on the car and plan on driving it for a long time.
But would like to educate myself on any possible fixes. Try this Try the throttle reset procedure TDI s : Jetta. Will try throttle reset procedure. Originally Posted by Timujin. Find More Posts by ralekato. Originally Posted by oilhammer.
Not sure what you mean I have no problem "working" on them so long as any changes don't make my job harder or impossible. If it is running right it takes off like a scalded cat when you hit it. Both my and acted the same. For a heavy truck it takes off. Oil hammer has the program reflash the system dealer should be able to help if they are any good. Dang, over 2 months and the OP has not tried the throttle reset procedure, or whatever it's called, to report back. I make mistakes, I am out of control and at times hard to handle.There are only two new cars in the U.
When rolls around and more stringent emissions requirements finish phasing in, we may find ourselves with just the Benz. Mercedes has shown us its particulate-filter-equipped and compliant E BlueTecbut Volkswagen hasn't revealed what it's doing to comply with the stricter standards.
Presumably, VW will follow Mercedes and add similar technology to clean up the exhaust; however, VW has conceded that a diesel Jetta might not be ready here by the beginning of the year.
If VW diesels are your bag, you're not entirely out of luck. The German automaker may stockpile Jetta TDIs, which it will sell into the calendar year until a true, emissions-compliant model is ready. In Septemberwe pitted a Jetta TDI of the previous generation against its gas-sipping competitionand although the Jetta wasn't the quickest or most fuel efficient of the bunch, it offered a nearly gas-like experience while delivering 42 mpg on our highway loop and 33 mpg around town.
The same fuel-conscious hp, 1. Now in its fifth generation, the Jetta has grown in size, refinement, sophistication, and price. So the question before us now is: How does the Jetta acquit itself when it has only half the horsepower? If you're not interested in stoplight drag races, there's very little that says diesel about the TDI.
There is a trace of turbo lag from a stop, which can be seen in the longish The Jetta's pound-feet of torque and optional six-speed dual-clutch Direct Shift Gearbox keep the power available and give the impression that there are more than horses underhood. In park, the only telltale that you're in a diesel Jetta is the rpm redline on the tachometer and the glow-plug light — it looks like a fusilli noodle — that briefly illuminates when you start the engine.
There's no waiting for the glow plugs — just hop in and turn the key. When the engine is cold, a bit of diesel clatter can be heard from inside the cabin, but once the engine is warm, there is mostly a mellow hum with only the slightest hint of the characteristic percolator-like gurgling. At idle it's a bit louder than the gas Jettas we've tested. At speed, the engine note moves into the background to the tune of 68 decibels at 70 mph — two more than the regular Jetta and two less than the GLI.
Don't tell your passengers they're in a diesel and it's unlikely they'll ever suspect there is anything unusual about your Jetta. Since diesel pumps are inevitably coated in diesel fuel, they might wonder why you smell like a trucker, but that's not the car's fault. Despite our alpha driver tendencies — gotta be in front, gotta be in front — the TDI returned 36 mpg, which translates into a heady mile range the EPA highway number of 42 mpg equals miles between stops. The Jetta TDI is so adept at hiding its weird side that hybrid cross-shoppers who revel in the statement and odd nature of their vehicles might be turned off by its unabashedly carlike personality.
Volkswagen's diesel is an affordable, fuel-efficient car — never a hybrid spaceship — yet it retains enough diesel traits to keep things interesting. We're hoping VW finds a way to keep selling it. New Cars. Buyer's Guide. Type keyword s to search. Today's Top Stories. Ford Bronco vs. Jeep Wrangler: The War Begins. View Photos. This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses.
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