Hello. I have and isuzu kb 320 v6(6vd1 engine),2001 model,manual transmission. Has done 55000km.on the clock. The car has a tendency of randomly misfiring,back firing and jerking at low speed and when it has reachedoperating temperature. When its on the high way it move perfectly without any problem. I have changed the fuel pump with a 3.8bar pump from Bosch,crank sensor,cam sensor,air flow sensor, service injectors,changed fuel filter. Problem still persists. Is there a somewhere i can attach a video show the rpm flactuates when it does that thank you
Codes? You should have codes. I'd be looking for a bad electrical connection (grounds) without knowing codes. Codes should get you to a general area to concentrate on.
I used 2 scan tools to check it but no codes appeared. I have been having the car for over 5 years without any problems