Missfire when going slow

erratic wire feed speed can be from worn inner liner in the lead
the inner lining is like a close woven spring and with the welding wire moving through it , it will wear a groove in the liner that jams the wire as it moves through
Really evident if you change from a small gauge wire to a slightly larger wire
rust in the liner from wire that has not being used for a while will also cause the erratic feed
the fix is to clean the wire prior to going into the liner or replace the liner for both

Start with a compression test. I suspect your # 5 cylinder has cracked rings.

a bad or clogged injector can give a misfire code.

You might want to pressure test the cooling system and remove the #3 spark plug. After the pressure tester sits on there for a few hours look into the combustion chamber to see if there is coolant. Misfires like these can sometimes be the result of a leaky head gasket. Also white smoke in the exhaust can be a sign. I assume the spark plug looks good?

I assume petrol? If yes then it sounds like the idle control valve, these are common on VAG

The battery could be slightly weak, making the computer go on the fritz, try a fresh battery!!!! The rev counters bounce often with a weak battery.

Leave feedback good or bad.

you have an ignition coil going bad if the check engine light is on have the code pulled and it will pinpoint witch cylinder is missfiring if it is not on you will need a scan tool to watch the missfire in data mode to pinpoint it that way.you may also find when you pull the coil out that is missfiring it may be covered in oil you will need to replace the valve cover gaskets if this is going on and clean the oil off the coil and **** the oil out where the spark is

This is going to sound a bit far-fetched, but I've had a similar problem with a '93 discovery... Turns out the problem was water in fuel tank.

check the belt timing. could be firing early or late.

I get same problem blurring like slow motion
on closeup of faces really bad watching dvd can you help