Hi all, I am once more asking for your kind help to help me troubleshoot and hopefully solve a mechanical problem that kept my Quattroporte III from starting for almost a month now. The mechanic and I are running out of ideas so really, I would be most grateful for any help. Bottom line: the current engine condition is described by this video: https://drive.google.com/file/d/12bgFvco8e8QFlWYJPmdsAChrLImRXuNc/view A bit of background: it all started with a full carburetor rebuild, performed by a professional two months ago. After that, the car started lacking power, especially under load. Typical symptoms were hesitation and stumble upon start after a red light, car running rich (fouled plugs, very poor mileage). At first, it negatively impacted driveability and mileage, but didn't prevent me from driving another 500 kilometers including highways at 130 km/h. The first time the car stalled was during a demanding uphill segment, and I had to wait 15 minutes before I could successfully restart it. There was a lot of fuel in the air filter box. I initially suspected fuel delivery issues, so I replaced fuel lines, pump, and pressure regulator, and can confirm the Webers now receive 2.75 psi of fuel. No difference. I also replaced a couple of vacuum lines which were cracked. I also suspected a weak ignition coil, and replaced it with a new coil, same exact reference. No difference. A few weeks later, the car stalled again at a red light, after a really difficult 80 kilometers. As I slow down and and put the gear in neutral, the engine stalls, and there is no way to start it again this time. I parked it nearby, came back the next day, replaced spark plugs on the spot. After that, I managed to crank the engine a couple of times, but I really had to floor the accelerator pedal to avoid stalling. I could drive less than a kilometer, but again, flooring the accelerator achieved only a measly 15 km/h. As soon as I released the pedal, the car stalled again. After a few attempts, the engine no longer started at all and I had to push it to another parking spot. Car gets towed to the mechanic the next day, who confirms that we have a spark, double-checks ignition timing, does a few usual checks. And tells me the engine is getting too much fuel - most likely a carburetor issue. Car gets towed from the mechanic to the carburetor shop, who re-opens all four carburetors, verifies that everything is in order. All jets are factory spec, choke is not engaged, floats height is correct, needle valve operates correctly. And I get the call no one wants to get: "This is not a carburetor problem, you have a problem with your engine. The engine is not aspirating air, it is actually blowing air through the carburetors. And by the way you have 80 psi of compression on all cylinders. Car needs to go back to the mechanic." This is the day when I shoot the video at the above link. Car gets towed back to the mechanic again. Both him and I can think of nothing else than a timing chain having jumped a few teeth, and my only hope was that the pistons hadn't hit any valve yet. The logical next step was to open the four cam covers, and adjust valve/camshaft timing. Possibly replace chain tensioners. And then check compressions again. This was done today, and the mechanic confirmed that cam timing was perfectly correct and did not require any adjustment. He also opened the distributor, and says it looks in order. I am really running out of ideas here. Could you please look at the video and tell me if that makes you think of anything? The noise, the speed at which the engine is cranking, the carburetors blowing air... ? Thank you very much in advance for your time.