1.6 Hdi Euro 4 reduced traction.

Hello friends, my car is a 2010 Berlingo 110 with a Euro 4 engine. It has a reduced power output. The particulate filter has been removed, the catalytic converter is empty, the turbo and injectors have been recently revised, and there are no problems with the engine, but the car doesn't pull. I can climb a ramp in 4th gear, but I have to go up in 2nd gear, it revs up, then I shift to 3rd gear and the car stalls as if there's no turbo. I changed the solenoid valve, but the situation is the same. I work at an authorized service center for the same company, and there's no problem with the turbo; it pulls, but it's like it's not engaged at all. On flat roads, there's no problem, it goes very easily at 150-160 km/h, but the acceleration is very slow. What could be causing this, and what should I check? Also, the check engine light comes on, but goes off when I refuel. There's a solenoid valve fault (I forgot the code) and a spark plug fault.

Hi brother, I also have a 2010 1.6 HDI 407 and experienced the same problem. I did some research and thought it was caused by the air flow meter, a common problem in diesel vehicles. I disconnected the flow meter's socket and the car worked better, but fuel consumption increased slightly. Following suggestions, I removed the flow meter and cleaned it with brake cleaner. The problem seems to be fixed for now, but the definitive solution is to replace the flow meter. Currently, it costs around 9000-9500 TL. [Image link: https://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516" integrity="sha512-8DS7rgIrAmghBFwoOTujcf6D9rXvH8xm8JQ1Ja01h9QX8EzXldiszufYa4IFfKdLUKTTrnSFXLDkUEOTrZQ8Qg=="] data-cf-beacon="{"version":"2024.11.0","token":"11ac6a036a5c4b83a3c20a30a3bc3ba2","r":1,"server_timing":{"name":{"cfCache Status":true,"cfEdge":true,"cfExtPri":true,"cfL4":true,"cfOrigin":true,"cfSpeedBrain":true},"location_startswith":null}}" crossorigin="anonymous">

I had an air flow meter fault once, I cleaned it, and after that it never lit up again. Since my car is an intermediate model, it has factory fluid, and that fluid was running low, causing the fault and resulting in slow acceleration. I did some research on the problem; the vacuum pump was producing air to the solenoid valve, which is the turbo valve. I checked the pipe there, and no air was coming out. I opened the air outlet from the vacuum pump with a pin, and this time air started coming out. However, our so-called know-it-all mechanics had installed the wrong or faulty solenoid valve, and the part wasn't working at all. So I disabled the valve and connected the vacuum pump directly to the turbo, and the turbo started working. Currently, there are no problems. My only issue is the factory fluid; when the car has this fault, it doesn't go above a certain RPM. I'll solve that, God willing. If I, with my technical knowledge, can solve this problem, it means there are very few mechanics left in the country. Two mechanics looked at it and couldn't figure out what the problem was. I solved a problem that required a bit of thinking; the mechanics just do what they know best, none of them are solution-oriented. unfortunatelyhttps://static.cloudflareinsights.com/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da1771523124516" integrity="sha512-8DS7rgIrAmghBFwoOTujcf6D9rXvH8xm8JQ1Ja01h9QX8EzXldiszufYa4IFfKdLUKTTrnSFXLDkUEOTrZQ8Qg==" data-cf-beacon="{"version":"2024.11.0","token":"11ac6a036a5c4b83a3c20a30a3bc3ba2","r":1,"server_timing":{"name":{"cfCache Status":true,"cfEdge":true,"cfExtPri":true,"cfL4":true,"cfOrigin":true,"cfSpeedBrain":true},"location_startswith":null}}" crossorigin="anonymous">

First of all, get well soon. Have your vehicle's vacuum hoses checked. The hoses leading to the part called the N75 valve can crack, causing vacuum leaks. Also, in older 1.6 HDI models, there's a plastic air reservoir-like part in the vacuum line that can leak. If you can find a turbo specialist or mechanic with brake vacuum pliers, they can check these. Also, even if you buy a new N75 valve from a service center, the vacuum line is 80% faulty. There are N75 test videos; watching them will show you how serious this problem is. This valve checks the turbo's bypass line and wastegate, ensuring your turbo works properly. If you drive like this for a long time, your catalytic converter will clog, your turbo will fail, and if your vehicle starts consuming oil, the inside of your turbo is damaged. When this happens, the vehicle goes into protection mode at random times, not exceeding 2500-3000 RPM. Turning it off and on again corrects the problem. If there is no oil consumption, have the parts I mentioned checked as soon as possible.