I replaced the oil pressure switch and the air intake tube with the Mina aluminum one and everything was running great on the test drive, about 15km around town. I went to pick up some take out for dinner and while I was inside to get the food the engine started to make a ticking sound I didn't hear on the test drive. I revved the engine a little to hear if the frequency of the ticking increased and the engine stalled and won't restart. The ticking did increase when I revved the engine. Again no oil leaks or drips under the car although there was a little in the air intake tube. The oil level was a bit over full after the oil pressure switch replacement. I don't have the codes handy but I will see if there is any and post any when the tow truck drops off the car. Any ideas before I call the mechanic on Monday?

 

I went to get the car with the tow truck driver and we had to move the car to get it on the flatbed. Since we couldn't push it I started the car, It gave one little knocking sound and the engine went into it's regular mode, 600rpm and no knocks, rattles or strange noises. I let it run for a few minutes and since it sounded fine and was running normally I drove it home with the tow truck following me in case the car started acting up. The car made it home fine although I did drive it rather gingerly. Could I have screwed something up installing the new air intake? It was pretty much a straight swap. I did notice a tiny bit of oil in the old air intake. Could the knock be the result of too much oil in the engine? The dipstick says it's just above the top dot. Tensioner were redone buy the Jaguar dealer in Vancouver in 2014.
I did get some codes.
P1798 - CAN transmission center unit / instrument cluster malfunction that cleared and didn't return when I started the car.
U1041 - current speed signal invalid or missing message
B 1595 - ignition switch illegal input code
B 1352 - current key in circuit failure

Any help would be greatly appreciated.