1998 Nissan Micra Problems

Goes well and sometimes a little jolt and think it’s going to stop then it carries on

Traveled through flooded area started drove home now no spark turns over but will not start

when driving along the all dials.fuel,temp gauge and speedo all repeatedly go on and of randomly

can anyone tell me what the spark plug gap should be

car starts to judder and misfire after 55 miles per hour

hesitation when low speed but when in high speed its fine,and low power when aircondition is on?? can you help me??

the reversing light doesn't work. Ive had the reversing switch out and had a look, done a continuity test, no breaks in wiring. bulbs aren't blown. but i have noticed inside the gear box that the contact for the reversing switch is rotating...