PRO-4.0L Member 3 Member For: 13y 10m 11d Posted 30/05/10 05:11 AM Share Posted 30/05/10 05:11 AM Hi fellas I have a problem with my AU SERIES 3 I6 INTECH blowing black smoke and chewing though fuel like crazy. I have changed the coil packs,spark plugs,knock sensor,fuel pressure regulator,fuel filter,fuel pump,spark plug leads,map sensor,O2 sensor cleaned the throttle body pcv and the whole lot only use bp ultimate (waste of money). Does anyone please have any clues what it could be ??? cheers Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 6m 5d Gender: Male Location: Perth Posted 30/05/10 05:27 AM Share Posted 30/05/10 05:27 AM where all the plugs black when you pulled them out? Leaking injectors?? Link to comment Share on other sites More sharing options...
PRO-4.0L Member 3 Member For: 13y 10m 11d Posted 30/05/10 08:21 AM Author Share Posted 30/05/10 08:21 AM [Thanks for the reply champ I pulled the O2 sensor off and it was black Link to comment Share on other sites More sharing options...
Ralph Wiggum Moar Powar Babeh Lifetime Members 19,323 Member For: 18y 6m 5d Gender: Male Location: Perth Posted 30/05/10 08:46 AM Share Posted 30/05/10 08:46 AM I meant your spark plugs mate, the 02 sensor will be black due to the rich mixture.Pull the spark plugs and check the colour, if only a couple of one is black thats likely the cylinder that is running rich,Since you have changed pretty much everything bar the ecu I would suggest a leaking injector.But if your coolant temp sensor if u/s and the ECU doesnt get the values it its looking for it will stay in cold mode and pour a heap of juice into the motor to try and warm it up Link to comment Share on other sites More sharing options...
PRO-4.0L Member 3 Member For: 13y 10m 11d Posted 30/05/10 09:19 AM Author Share Posted 30/05/10 09:19 AM Just pulled them out they all look normal,I have a problem with my temp gauge where it has been fluctuating on me sometimes ???, Thanks for the info mate Link to comment Share on other sites More sharing options...
Rob67 New Member 1 Member For: 4y 11m 20d Posted 08/04/19 08:04 AM Share Posted 08/04/19 08:04 AM I am having the exact same problem. I have a 2002 AU series II 1 tonner auto. I have changed the plugs, coil pack, fuel pump, fuel filter, had injectors serviced with new o rings etc, new air filter and taken it to an ex Ford technician whom is very familiar with this model and he's stumped. He changed out o2 sensor and I think map sensor. He's telling me I need a new engine. The problem is intermittent. some days it will cruise around all day, no problems but usually after a highway run it will run like a bag of sh*t, idle really rough at about 400-500 rpm, sometimes stall and spew black smoke. Then it goes away! All this with either aircon on or off. Never gets overly hot, needle sits between the "O" and "R" in the "NORMAL" range regardless of the ambient temperature. I am losing coolant very slowly but no oil in coolant and no coolant in oil. Otherwise, when its running good, it is smooth as silk, lots of power etc. WTF? PLease help! Link to comment Share on other sites More sharing options...
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