Frankly

Hi,
no more fault codes, a lot new parts, 044 fuel pump, all ignition stuff.. injectors etc)

Usually, hot motor, after 15-20min shutdown. -Starts normally, but after few second stalls / almost stalls and runs roughly. Usually, second start and it will run fine.. (or keep on running high idle a little time..)

I'm gonna replace fuel pump check valve next.. Yes, pump and check valve are almost new (issue started a little time after i relplaced pump).

So.. let's see, are new Bosch stuff really so crap or so

Any other things to check?

fenixv8

The flywheel speed sensor might be something to check as well. MY car is running a bit better since I replaced that and the Head temperature sensor. Along with the ignition stuff those 2 made the biggest difference.

Frankly

I think i have fix this problem. -About 1-2 year ago I replaced lambda sensor, and I installed JP-Dansk brand lambda... Now I installed new BOSCH lambda and it works normally...

fenixv8

What is the lambda sensor?

Frankly

I mean Oxygen sensor

-nick

Remind us of what you have checked so far? A flaky cht sensor could do this. I just replaced mine with a very intermittent short.

The o2 sensor could also contribute. The motronic will run a base fuel map for a short period after startup, which should give a very stable idle. Then it switches to the o2 sensor feedback which is a little leaner than the base map and the idle is a little less steady. The hotter the engine is when you start, the quicker it will switch into o2 closed loop mode.