Engine has no power when cold, Transit MK4

[Transitit MK3/MK4]

I'm new to this forum. I own two Transits, mk3 and mk4. The newer one is a 2.5td minibus, model year 1994.

I've had a minibus mk4 for two years and I've probably had the same problem all along. I noticed it better last winter while driving to work. When the engine is cold, the car accelerates and drives poorly. The top speed is 80 km/h. But after driving 20-30 kilometers, there was a jerk and acceleration and driving became normal. In the summer, faster, maybe driving 2-3 kilometers is enough.

The car had an electric Lucas Epic injection pump, which has been replaced with a mechanical Bosch pump. The work was done at a Diesel and auto electrical repair shop. The vacuum hoses of the turbo's charge pipe vacuum gauge and the egr valve were blocked. I've opened them, but the problem is the same. Their vacuum diaphragms are intact. I've replaced the new turbo and the new one has been factory repaired. The old one wasn't very dirty and in my opinion was also intact. I've cleaned the EGR valve and it wasn't very dirty either.

Once the car started shaking while driving and I couldn't press the gas. I was able to drive it home at idle. Then I removed the EGR valve, cleaned it and the problem went away. (Even though it had been disabled?) The EGR valve comes with a vacuum hose and an electrical plug.

I've replaced the MAP sensor. The Bosch injection pump's idle solenoid is also new. Now I've ordered the MAF sensor and I'm waiting for it. Can you suggest anything else that I haven't understood yet? I don't understand much about this technology, but I can replace spare parts. Thanks!

(Text written with Google translator)

[Transitit MK3/MK4]

Now the MAF sensor has also been replaced. The same problem persists with the Transit, but I can live with it.

[Altransit]

Is it an automatic gearbox?

[Transitit MK3/MK4]

Is it an automatic gearbox?

Manual transmission MT75

[Altransit]

Could it be the torque sleeve?

viewtopic.php?f=18&t=45777

[Transitit MK3/MK4]

Could it be the torque sleeve?

viewtopic.php?f=18&t=45777

Thank you very much. This is good to understand and study. The Bosch pump is a used part of an old car that was installed here. So it could also be faulty. Now I'm getting to know this issue.