Peugeot 206 1.1 Error P0300: Ignition Failures Despite Various Checks & Changes

Hello, Gentlemen, I have been struggling with the P0300 error in this peugeot for a long time. Checked / changed: coil, candles, injection molding bar, compression, valve clearance, fuel pressure, leak tightness.
On a cold engine:
the vacuum in the suction manifold is 0.55 bar and the pointer pulsates quite rhythmically;
KWZ jumps from 0 to 12 degrees;
the injection time is 8ms;
On a hot engine:
the vacuum in the suction manifold is almost 0.6 bar and the pointer pulsates quite rhythmically;
KWZ jumps from 0 to 12 degrees;
injection time is 5ms;

After the engine is warmed up, the probe works properly.

Conclusions:
I have a low vacuum in the collector by which the controller gives too much injection time on a hot engine. As the customer gets in the car and goes under the overpass it so tugs that the car has no strength to drive uphill.

When I add gas, the vacuum increases to about 0.7 bar or 2500 rpm. What is he running about?

Added after 1 [minutes]:

Come, this jerking appears ok, once a week.

Did you regulate the valves?

jurekk55 wrote:

Did you regulate the valves?

He wrote that he checked

Added after 1 [minutes]:

Kat is not clogged?

Ireneo wrote:

He wrote that he checked

What clearance measurement results?
Tap the surface of the valve-lever? No seat and seat tightness? Relocated timing?

Negative pressure too high, so the cylinder is sucked in too little air, or has a leaky intake.

Ireneo wrote:

Kat is not clogged?

If I have 0.5 bar and I add gas and it grows up to 0.7 bar, then I have a positive exhale.

Added after 2 [minutes]:

jurekk55 wrote:

What clearance measurement results?
Tap the surface of the valve-lever? No seat and seat tightness? Relocated timing?

Negative pressure too high, so the cylinder is sucked in too little air, or has a leaky intake.

Luzy ok, I smoke on the touch so that the timing is ok but I did not check its setting, compression on cold after 10 bar so that the valves keep tight, intake with samostart, disconnected from the collector all connections (servo, odma, fuel pairs).

jurekk55 wrote:

Negative pressure too high

Too low. Gentlemen, learn to distinguish between negative pressure and absolute pressure.

kubas10 wrote:

If I have 0.5 bar I will add gas and increase to 0.7 bar

What are these values, where are they read?

The order of the locks check.

ociz wrote:

jurekk55 wrote:

Negative pressure too high

Too low. Gentlemen, learn to distinguish between negative pressure and absolute pressure.

kubas10 wrote:

If I have 0.5 bar I will add gas and increase to 0.7 bar

What are these values, where are they read?

The value read from the vacuum gauge.

Added after 3 [hours] 6 [minutes]:

Tomorrow morning I check this timing, the shaft is somewhere blocked in the front between the engine and the transmission?

Added after 19 [hours] 22 [minutes]:

With the shaft locked, the shaft 2 teeth back. After correct setting, the engine is much worse, but the negative pressure has increased to about 0.6 bar.

The week the customer rode and today again P0300 ...

Have you found a bad hole on the flywheel?

Make it the original settings or delete the adaptation.

Measure the compression again.

These engines are specific.

The "visually" post is almost no different. The engine family is the same, so locks are everywhere the same.
Under the exhaust manifold, next to the chest you have a small hole, so that you put a finger. Under it you have a small hole for the screw 6. There has to be a blockade.

The shaft fits in one place, more holes were not there, then the shaft was 2 teeth back. After correct setting of the timing I did reset the adaptation, the required engine temperature below 30oC. Negative pressure increased to about 0.65 bar on cold, and earlier it was 0.5 bar.

Measure the compression. It may turn out that the head will need to be raised.

This is a good idea, I will check and let you know.