Hard gear changes and engine jerks when cold

Hi,

a friend of mine without internet access has (actually still) the following problem:

If the engine ('89er PT' I think) is cold (up to 50°C water temperature), the car is very strong (a kind of "bock") and has a bad gas intake. In addition, the gear changes are very hard. The error memory says, at least last, that it does not receive a signal from the reverberator - although a new distributor and a dealer is in it (and that does not fit IMHO to the symptom).

Furthermore, the following has already been renewed:

- Intake air temperature sensor
- Speed sensor
- a knock sensor (driver, I think)
- OT donor
- Lambda probe
- LLRV
- the whole vacuum-powered petrol pressure regulator

Next, the G62 would be available - does that sound plausible? However: How can the whole EInfluenz have on the gear selection? Wrong engine load information and therefore wrong switching pressures?

Over 50°C, the whole haunted world has an end. Unfortunately I have not been able to do a measurement block analysis on cold machine so far, otherwise I could exclude the G62.

But what do you think fits the symptoms described?

Thank you and IG

Bastian