Verbrauch steigt und steigt, Motorleistung sinkt | Posts 32+

Sure, please provide the text you would like me to translate from German to English. I will only provide the translation.
/viewtopic.php?t=3020&highlight=intake manifold

It sounds very similar, but it's not the person who promised to provide pictures.

I'm starting to get worried myself because my car now has 178,000 km (approximately 110,000 miles) and I think it's starting to show some subtle signs of problems: The cold start time is about 0.5-1 second longer than it used to be, and the fuel consumption was previously 0.3-0.5 liters (approximately 0.08-0.13 gallons) lower.

Greetings.

Another question regarding... Intake manifolds...

I previously drove approximately 70,000 km using biodiesel. It should ensure that the fuel lines are clean. To my knowledge, biodiesel is somewhat more aggressive than regular diesel, and its purpose is also to dissolve old and accumulated organic compounds, which then burn off.

Am I mistaken, or not?

I've also forgotten something about all of this – I see air bubbles in the fuel hose on the EP. ??? Where does this air come from?


Best regards,
Mhernach.

Hi,

mhernach wrote:

Another question regarding. Intake manifolds... I previously drove approximately 70,000 km using biodiesel. It should ensure that the fuel lines are clean. To my knowledge, biodiesel is somewhat more aggressive than regular diesel, and its purpose is also to dissolve old and accumulated organic compounds, which then burn off. Am I mistaken, or not? I've also forgotten something about all of this – I see air bubbles in the fuel hose on the EP. ??? Where does this air come from? MFG Mhernach

Since the biodiesel never comes into contact with the sludge in the wastewater treatment system, it obviously can't verschandeln anything there.
The only things that are cleaned are the fuel injection system and the fuel tank. You'll end up with all that sludge in the fuel filter.

Best regards, Rainer.

Oh yeah... shitt... it's not a gasoline engine .... sorry, I have to agree with you there...

So, are you also saying I should remove the exhaust manifold, or do you know of a way I can at least check to see if there's any dirt or buildup inside?




Best regards,
mhernach

Hi,

I'm not sure if it's worth the effort to remove the intake manifold.
Why don't you take a look inside the EGR valve, or simply remove it?
If the leak is no more than 2mm, I wouldn't verschandeln anything.

Best regards, Rainer.

Hello everyone...

I think I've solved my problem now, but I can't be completely sure yet... I need to wait for the next tank of fuel.

So, I described the problem I'm having with my VW workshop, and he said regarding my test drive, 'That can only be the mass airflow sensor.'

Okay, I thought to myself. I'm going to the spare parts warehouse now, I'm going to buy a used one (€130) , and I'm driving it home, then I'll install it........................

Performance was the same for the first 10 km , but then... it's running great again . The boost pressure is also back to the target value, and it's pulling strongly again in the higher RPM range...

I'm curious to see how it will develop further.

Okay, I will let you know what the facts are.

Thank you again to everyone who helped me with advice.

MFG Mike

.... Hello everyone... I got my hopes up too soon... My car is indeed better than before, but it's still sluggish above 120 km/h... And the fuel consumption has settled at 8.5 liters per 100 kilometers... I was at the VW dealer yesterday, and they just told me to bring it in so they can take a look and do their own test drive.... It's scheduled to take about half an hour. Do you have any other ideas or suggestions? Based on the measurements I've taken so far, everything seems to be within the acceptable range.

Okay, I also have 225/45 R17 tires. How much power, or rather, how much more fuel consumption should I expect? I've roughly estimated about 3/4 to 1 liter more.


Best regards, Mike.

Hello,

Without having to go through the entire thread again, if everything seems okay with the engine, how about the exhaust?
Cracked? Is the KAT interior cracked or crumbling? Did anyone mess up the pipes inside the mufflers?

Best regards, Rainer.

Hello,

Without having to go through the entire thread again, if everything seems okay with the engine, how about the exhaust?
Cracked? Is the KAT interior cracked or crumbling? Did anyone mess up the pipes inside the mufflers?

Greetings, Rainer

'No, everything is fine. The only thing is that the rear brake pads are worn out (metal on metal)... otherwise, nothing else is wrong. I'm going to get a chip tuning now; hopefully, that will help.'

Okay, seriously now... I have no idea anymore.

That sounds like 'using a cannon to shoot sparrows.'

Did you cover the AGR with a shim, or are you still using the 'screw' method?
Okay, do that first!

And then, keep watching.

That sounds like 'shooting cannons at sparrows.'

Did you cover the AGR with a shim, or are you still using the 'screw' method?
Okay, do that first!

And then, keep watching.

AGR is still... no improvement... the 'shooting sparrows with a cannon' analogy is good... but also the truth... I also have my concerns about dealing with something like this with 270,000 km on the clock... but what can you do... a 1Z doesn't cost the world, and besides, I want to drive half a million km...


Sure, here is the translation of the text from German to English:

'LG Mike' translates to 'Best regards, Mike' or 'Sincerely, Mike'.

*fetch*

What happened to it? I've always been curious about...

Well... still the same. I replaced the thermostat last week, and now I have to drive a bit more. The fuel consumption is at 9 liters, and the engine performance with the tuning (a cheap tuning) is better. Now it can at least reach 170 km/h, but the power delivery from 2000 rpm is insane; it feels like someone is hitting you in the back with a sledgehammer.


But, as I said, it will take a little longer...

'Now, other problems have also arisen, such as not always being able to access my engine control unit, while the others always can. Then there's the other engine noise that started after I changed the thermostat, and the strange whistling sound from the turbo when I turn on the tuning and accelerate fully. According to VAG-Com, it looks like the boost pressure is fluctuating between 1700 mbar and 1950 mbar... and so is the acceleration.'

Slowly but surely, I'm starting to feel desperate...



*fetch*

What happened to it? I'm just curious...

That sounds familiar. Since my current A4 no longer has a tow hitch, I've always borrowed my brother's 80 TDI. Eventually, it just wouldn't work anymore, as the car barely moved even without the trailer, and could only just manage to cover the distance between two gas stations.
By the way, his (village) workshop made sure that his brother no longer drives an Audi.

After they unnecessarily replaced the ESP module, the jerking was still there, and it was already running poorly. Then I read something in this forum about the needle lift sensor, and despite his protests, I installed the third one. I plugged a nozzle from my AFN into it.
The longer the engine ran smoothly without sputtering, the more his blood pressure rose, knowing he had to pay 1500 euros for the ESP system.

Performance is still lacking, fuel consumption is high (8-9 liters), and no soot is visible.


The engine also got very hot, with oil and water temperatures reaching around 110 degrees Celsius on the highway.
It's normal to have some issues with an old car (145,000 km).

Cause: Significantly misaligned injection timing after the ESP replacement.
I didn't have a VAG-COM back then, so I can't provide any data readings.
The Bosch service fixed it, but it cost another hefty sum. 'Fachwerkstatt' didn't want to hear anything about repaying the money.

If anyone is looking for a good used ESP for a 1Z engine, I know someone who might have one.