Tuning: 74kW Engine, 82k Miles - Possible?

Hello everyone,

Overall, I'm quite satisfied with my 74kW PD engine (Euro3, 82,000 km, timing belt, diesel filter, air filter, oil filter, and new oil) and the performance it offers (Fabia Combi 11/01, 1307kg). The only problem is that it only reaches the stated top speed (187 km/h) with a lot of effort, and that's only according to the speedometer. The onboard computer indicates 103 km/h when the speedometer shows 110 km/h.

The turbo kicks in around 1500 RPM, and from approximately 1700 RPM, the boost increases until around 3000 RPM, after which it remains constant above 4000 RPM. The 0-60 mph acceleration is around 8 seconds (average, using a stopwatch), and the 60-80 mph acceleration in 5th gear is approximately 11 seconds (average, using a stopwatch).

Up to approximately 170-180 km/h, the car accelerates relatively quickly. At 180 km/h (approximately 3550 RPM), a noticeable drop in power is felt. Reaching 3750 RPM (190 km/h) requires a lot of effort. I have tested with different road surfaces and inclines. Many TDI-PD owners report that their engines rev out to the limiter, well above 4000 RPM, and reach speeds of 210 km/h or more.

Today I took my car to the Skoda dealer to have it checked with a diagnostic tool. All the values (at idle) were within the normal range. The mass airflow sensor (MAF) reading was between 297 and 305. The test drive with a new MAF sensor was a disaster - either it was the wrong part (the part number matched, but it had an additional small round grid in the intake) or it was simply defective (the turbocharger engaged intermittently and irregularly, and when it did, it was late).

My current driving distances are up to 1000 km per week (maximum, often 800-900 km). Since I drive a lot on country roads and prefer to use the 4th and 5th gears, I would appreciate a bit more torque. I have contacted several tuners who offer performance upgrades with power outputs of 120-131 hp and torque of 280-310 Nm (***, Hohenester, Nothelle, Wimmer-RST, Oettinger).

Since my car is no longer covered by the warranty, the extra cost for the tuner to extend the warranty is not beneficial to me anymore.

What is important to me is the durability of the engine and the powertrain, which is why I would like to limit the torque to a maximum of 300 Nm.

What do you think about my plan (please consider the mileage) and the issue with the maximum speed? Are there any of the mentioned tuners that you would recommend or any that you should definitely avoid? Or perhaps an alternative?

1. Fix the engine problem.
2. Fix engine problems.
3. Fix engine problems.

Otherwise, it doesn't matter at what mileage you choose to have your car serviced.

If the clutch is already worn to the point where it's about to slip, will a higher engine torque after tuning finally be the end of it?

Otherwise:
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.
I'm sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

"Hey everyone, when you register for a new account, there's a specific screen that clearly instructs you to first use the search function and error database."
It's not in there just for fun.

Regarding the engine misfire you experienced during the test drive: The mass airflow sensor is still a likely culprit. The VW part number is definitely the correct one. The competence of the workshop is questionable, as they didn't provide any further explanations or troubleshooting for the misfires.

Thank you for the feedback.

The 82,000 km is a high mileage, the clutch feels fine and disengages as it should.

It doesn't jerk or produce excessive smoke. The power and torque are available throughout the entire rev range (constant from approximately 1700 rpm to over 4000 rpm), except for the 5th gear, where they become sluggish above 180 km/h (approximately 3600 rpm). In my opinion, the fuel consumption isn't particularly high – 4.9 liters per 100 km (calculated, the onboard computer shows 5.1 liters) with a mixed driving style and occasional full throttle (I checked the maximum speed several times).

Duchzugstest werde ich heute durchführen. 2000-4000 U/min im 3. Okay.

Possibly, I can do a test drive at the Skoda dealership using VAG-COM and then post the readings.

He also offered to take a closer look at the car (specifically the engine and turbo) - it should cost around 70 euros. Is that reasonable?

LMM readings at idle don't tell you much.

Make sure to take a test drive and log the data.

Also, sometimes it's a good idea to check the boost pressure - keyword: VTG linkage.

Regarding the tuners, I would also consider ******** as a strong contender.

But before you do that, you must first achieve the Seiren state.

My brother-in-law's 100 horsepower PD Golf 4 ran for over 200,000 kilometers without any problems.
Even my 1Z engine revs up to over 4000 RPM on the flat (indicated speed of 180-190 km/h).



m;

Here is exactly where my problem lies:

/viewtopic.php?t=1055&highlight=20004000

"Where exactly is the charging hose (photo online?) located, and how can I find a leak?"

Yesterday, at Skoda, the technician removed the plastic cover of the engine and examined all the visible hoses (small tubes) with his fingers, while using a flashlight to inspect the hoses located lower down.

Ah yes - the LMM looked like new on the inside - no traces of oil film and no residue.

Rainer K. wrote:

... Otherwise: https://community.dieselschrauber.org/en/viewtopic.php?t=3322 https://community.dieselschrauber.org/en/viewtopic.php?t=3285 "Hey everyone, when you register for a new account, there's a specific screen that clearly instructs you to first use the search function and error database." It's not in there just for fun. Regarding your engine misfire during the test drive: The mass airflow sensor is still a likely culprit. The VW part number is definitely the correct one. The competence of the workshop is questionable, especially since they didn't provide any further information or troubleshooting regarding the misfires.

Can you read this? Yes? Am I putting these links in just out of boredom?

If you can't identify the turbocharger boost hoses, then this is not the right forum for you, sorry.
For basics: https://community.dieselschrauber.org/en/viewtopic.php?t=3047