Engine cuts out!!!

[iceno9]

Can anyone help here....
I am finding that i start my mazda 6 diesel estate in the morning and then within a few hundred yards - it cuts out when you take you foot off the accelerator pedal (after some seconds). The fuel sediment light then comes on - which i think is normal when the engine is not running.
Once restarted, it normally behaves fine and there is plenty of pull in the car etc....the problem seems to be when the engine is cold only and its guarenteed to cut out probably once everytime.

I had the sediment light come on a few months back so i took off the fuel filter and drained it but didnt notice any water in the diesel. Put it back and all was fine until now. So....i have just changed the fuel filter again and found no water in there.....so i have now ruled out the filter and sediment light as a cause.

Could it be the engine temperature sensor? If so - does the car have a seperate sensor for the management system compared to the dash indicator - because the dash indicator behaves normally.

Also - i always do my own servicing and drop the oil every 8000 miles. I have never had anything reset on the management system....is there need to on a pre facelift model?

Thanks in advance.

 

[iceno9]

nobody any ideas here???

 

[GiJoe]

Don't know alot about Diesels, Sorry man.

 

[8.5MS3]

i know some deisels have an indicator that illuminates and tells the driver to wait a bit until the glow plugs warm up when doing a cold start. not sure if the 6 has it tho....

 

[Blendercloud]

i know some deisels have an indicator that illuminates and tells the driver to wait a bit until the glow plugs warm up when doing a cold start. not sure if the 6 has it tho....

This is spot-on. I think you're exactly right.

 

[lakedude90]

yea he is. all diesel now a days have at leat 3-4 glow plug through out the motor that will warm it just enough to make the combustion it needs. wher have a 09 f-350 and a tractor that is diesel. when ever we first start up the 350, no matter the coldest day or the hottest day of the year. it will always come just to make sure that the motor is ready for it. and it varies to. somtimes u have to wait long times then other days.

now also, the f-350 also has a canister in the exhaust that will fill up with ash. this is from accsess carbon burn off that the computer will notice and the truck will actually burn at a hight temp to burn off any carbon that have formed in the exhaust to optimze performance. it does say that if there is any mayjor perfomance lose for an extended amount of time that the canister might befull but we havent had to get it empted yet so i couldnt tell u what we witnessed as far as power lose or engine cut out.

 

[Blendercloud]

I always thought it went without saying, but I suppose not...

In any car, diesel or gas, you should always wait to drive until the car has warmed up. On warm days in a gas engine, you should wait until the idle settles and the cold idle switch has turned off. On cold days in a gas engine, you should wait until the coolant temperature gauge has started to move up (warming up).

On both warm and cold days in a diesel, you should wait to drive until your coolant temperature gauge starts to move. It is also a good idea to get an engine block heater.

 

[8.5MS3]

no this is before actually starting the car, equivalent of leaving the key in the on position without cranking the motor over. the glow plugs will use the battery power to warm the engine up prior to startup. some cars had a "wait to start light"