Good evening all,
Working on a cousins 307 hdi 90, had issues at mot where could not be tested as diesel was all over the underside and obviously leaking. Turned out to be someone had changed the fuel level device under the back seat, not replaced the plastic seal and siliconed it back up, obviously didnt work for long. anyway, replaced this and made the job correct with new seal, fixed and abs issue with it on rear , took car for 20 minute drive, no lights or warning displays and fuel leak resolved.
Next issue was that after purchasing the car 9 months ago i serviced it for him and advised a thermostat change as a precaution, didnt follow my advice and when the cold weather came the car over heated. Luckily it damaged the thermostat main housing off the block and not the head, ok roll on a few weeks after having a very slow water leak from housing that i couldnt cure because 1 of the 2 mating surfaces was no longer flat anymore. anyway, after replacing the complete thermostat housing from the head including new stat(which i did after the other stuck closed and overheated(i managed to get quite alot of water all over the top right side of the engine and over a sensor or 2 oxygen sensor being the main water logged one)) Cleaned off and put it back together.Started car and after a few seconds came up with anti pollution fault(never had any issues until the stat full housing change, no dpf on this model) over the next day or 2 the car would randomly go into limp mode and run like a sack of, we are now at the point where it is constantly on, clears with a restart then comes back on sometimes after 2 minutes, sometimes after 2 miles but it always comes back on.
Initially i thought the head was damaged and my thinking kind of went like this, after replacng the full stat housing the pressures in the water system were correct for the first time in proibably 3 months or so, i assumed that this may have been head gasket damage, initially i thought it was losing / using water, but i can confirm that it was just the levelsettling down after the housing change(system bled correctly) there is no oil in water or vice versa, no smoke out the back and no water level drop and so i think it safe to assume that the head is fine.
Wondering if anyone has any ideas or seen similar issues with the hdi 90? i have checked all connections etc, the only other thing i have really noticed is that when the maf sensor is disconnected whilst running and plugged back in, it makes no difference to how the vehicle runs at all, literally no change in revs etc. I am kind of scratching my head at this point but am going to try and get it onto a machine at some point next week to see what fault codes it throws. The only other thing that seems to make a difference is if you remove the fuel lines from the fuel tank pump under the seat, it was intermittent until the last time i removed them(it may just be co incidence or me clutching at straws) and now they are continuosly on.
Sorry for the long post, just wondering if there are any people that deal with things like this day to day and can give me any pointers please. Im thinking maf or oxygen sensor, i dont think a maf would cause limp mode(please correct me if im wrong)
Many thanks in advance.
Working on a cousins 307 hdi 90, had issues at mot where could not be tested as diesel was all over the underside and obviously leaking. Turned out to be someone had changed the fuel level device under the back seat, not replaced the plastic seal and siliconed it back up, obviously didnt work for long. anyway, replaced this and made the job correct with new seal, fixed and abs issue with it on rear , took car for 20 minute drive, no lights or warning displays and fuel leak resolved.
Next issue was that after purchasing the car 9 months ago i serviced it for him and advised a thermostat change as a precaution, didnt follow my advice and when the cold weather came the car over heated. Luckily it damaged the thermostat main housing off the block and not the head, ok roll on a few weeks after having a very slow water leak from housing that i couldnt cure because 1 of the 2 mating surfaces was no longer flat anymore. anyway, after replacing the complete thermostat housing from the head including new stat(which i did after the other stuck closed and overheated(i managed to get quite alot of water all over the top right side of the engine and over a sensor or 2 oxygen sensor being the main water logged one)) Cleaned off and put it back together.Started car and after a few seconds came up with anti pollution fault(never had any issues until the stat full housing change, no dpf on this model) over the next day or 2 the car would randomly go into limp mode and run like a sack of, we are now at the point where it is constantly on, clears with a restart then comes back on sometimes after 2 minutes, sometimes after 2 miles but it always comes back on.
Initially i thought the head was damaged and my thinking kind of went like this, after replacng the full stat housing the pressures in the water system were correct for the first time in proibably 3 months or so, i assumed that this may have been head gasket damage, initially i thought it was losing / using water, but i can confirm that it was just the levelsettling down after the housing change(system bled correctly) there is no oil in water or vice versa, no smoke out the back and no water level drop and so i think it safe to assume that the head is fine.
Wondering if anyone has any ideas or seen similar issues with the hdi 90? i have checked all connections etc, the only other thing i have really noticed is that when the maf sensor is disconnected whilst running and plugged back in, it makes no difference to how the vehicle runs at all, literally no change in revs etc. I am kind of scratching my head at this point but am going to try and get it onto a machine at some point next week to see what fault codes it throws. The only other thing that seems to make a difference is if you remove the fuel lines from the fuel tank pump under the seat, it was intermittent until the last time i removed them(it may just be co incidence or me clutching at straws) and now they are continuosly on.
Sorry for the long post, just wondering if there are any people that deal with things like this day to day and can give me any pointers please. Im thinking maf or oxygen sensor, i dont think a maf would cause limp mode(please correct me if im wrong)
Many thanks in advance.