Car gets power but wont start

Hello, my Sephia has a failure that appears intermittently, every now and then. When starting to drive at first gears, every time I accelerate, the car vibrates. As I release the accelerator, the vibration stops. And even more, the harder I accelerate, the stronger the vibration is. But as I set higher gears, the car vibrates less every time and, at 5th gear, it is not felt any more. I've already changed bearings, spark plugs wires and spark plugs, but the problem persists. Does anyone know anything about it?

Some days ago, the cylinder head was serviced and the valves adjusted, because my car had an oil leakage that damaged the air sensor. At the same time, almost all the sensors were cleaned. However, it now happens that, when starting to drive, the vehicle suddenly stalls. The fuel pump has been checked and it seems to be alright. But the failure is still there and I do not know what else to check. Could you please give me your opinion?

My car has a problem with the fuel pump. I do not know why but, every time I travel, the vehicle overheats. The failure starts with a power loss, the car then chokes and I have to stop, in order for it to cool down. After that, it works properly for weeks. It is a quite strange problem the one I have. When it fails, I have to change the fuel pump and it lasts for a while.

My vehicle had a failure in the spark plugs wires, so I decided to change them. But now, the problem is that I've connected wrongly. Please help me by telling me where I should connect each wire, as I've installed them all the way around and do not remember the correct one.

Was driving fine turned it off. Restarted it and when put in gear engine syarted to miss fire ,shakes violently, will not shake unless in gear does this even when not in motion. Checked codes says electrical problem. Changed wires and plugs and coilpacks did not help

My vehicle overheats and is powerless when ascending.

My vehicle has got automatic transmission and, when driving to a hilly place with the air conditioning on, it comes a moment when the car starts jerking until it chokes and stops working. I need to leave it off for around 20 minutes and it then keeps working as if nothing had happened. One of the worst things is that it does not consume coolant, the engine temperature does not raise and the check engine light does not turn on either. Might it be a sensor that is failing? This has occurred to me even when injectors were just cleaned, it had new spark plugs and had just been tuned up.