Hi everyone. I am new to this forum and need some help. I have a 1999 1.4 RT Clio fitted with a 1.4 8V Sandero (K7J) engine. The air conditioning pump's bearings were making an irritating noise and is embarrasing so I decided to remove the pump and replace the bearings. After i re-fitted the aircon pump, the car suddenly does not want to start. The battery is new, the timing is correct, cleaned and tested the TDC sensor (with multimeter), tested the fuel injectors, tested fuel pump, tested for spark, checked all fuses and relays. It cranks well but does not start. It backfired 2 or 3 times after the 3567 attempts to start it. Can anyone please advise me what can be the cause?