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You have not supplied me with the year, make, or model of the vehicle, but for the past (about 20) years, the most common answer to your problem in the USA would be a bad "coil pack".
This is usually a tall skinny plastic thing that makes the spark for the spark plug, and has a wire connection on the bottom to energize it.
The top of it has either a hole for the spark plug wire, or a wire that goes to the spark plug.
The number of coil packs are according to the number of cylinders/spark plugs in the engine. ( Usually 4 or 6.)
God bless your efforts.
have a compression test done and look for a moving valve seat insert
it gives the knock, misfire
as it is no 2 cylinder it is mechanical because you have moved the injectors and coils , plugs and leads and it stays at no 2 cylinder
If you want clean engine oil then change the synthetic oil out and put in diesel oil 20w40
It will not harm the engine as it is the same as petrol oil but with more additives than petrol oil
it is cheaper and has heavy detergent properties that keeps the engine internals clean
from the gunk in the sump ,it is clear that changing engine oil on a regular basis is something you don't do but if you want a reliable long lasting engine , it is must do number 1
Engine may be tight because oil has fried and deposits are on cylinder walls. Might have even broken some rings, but try changing oil, pull all plugs and add 1 teaspoon new oil to each cylinder. Crank with plugs still out for a few seconds, reinstall plugs and try to start. Good luck.
I would have it scanned and check what cylinders are still misfiring. I would change the ignition coil for that cylinder and see if that fixes the problem. If the misfire is still there...the PCM will likely need replacement.
Either worn valve guides, valve guide oil seals on that particular cylinder, or worn piston rings. You need to perform a compression test to find out which one of these it is.
Compression check each cylinder with all plugs removed. Take notes on which cylinder has the weakest compression.
If no compression difference and if all operating within range, then change the valve guide oil seals on problematic cylinder.
If the cylinder shows a significant drop in compression, then drop no more than five or six drops of oil down the plug hole of the problematic cylinder, and perform the compression test again. The oil will temporarily seal any worn piston rings, so the pressure should rise when retesting if the rings are worn. If the pressure remains low, then your valves are not sealing properly and require attention.
inspect the sparkplug plug first!! After engine is running for 20 sec (while misfiring), pull your #1 sparkplug and check for fuel. If there is no fuel replace the injector!!If there is fuel, post a comment for more help!!
i'm guessing that your car is a 4-cylinder. this is common for inline 4-cylinder engines. since the spark plug holes usually go through the valve cover, the valve cover gasket will leak and collect in the spark plug holes. to fix this you will have to replace the valve cover gasket.