406 hdi 2003 starting problems

[dazclan]

Hi, I really need some advice on this 1, my 406 will start every morning & run fine all day as long as i dont turn it off, it just refuses start when hot, if i leave it for a while to cool down then itl start again no-problem,,, iv had diagnosic machine on it but it says no fault codes found, iv changed the glow-plugs & glow-plug really & also the air flow meter changed but its still doing the same,, has anyone got any ideas what could b wrong thanks Darren

[steve_earwig]

Hi there Darren, welcome aboard

I suppose it could be the engine management's coolant temperature sensor

[Welly]

Might be the in-tank fuel pump sticking, it'll be fine once spinning and pumping but won't want to re-start when you stop it.

Have you listened for a deep grumbling noise when you first turn the key to ignition?

Next time you might try smacking the fuel tank to see if the pump bursts into life.

[dazclan]

Thanks for getting back to me guys,,
I didnt think ther was a in-tank pump as i had a look under back seat & it was just the float ther, I will try giving the tank a bash next time im at the car, thanks
the sensor sounds like it could be promising aswell, have you any idea wher its located,, thanks,,

I`ll give these things a try & let you no how i get on
cheers guys

[steve_earwig]

Is it a 90 or a 110? If it's a 90 then it'll almost certainly not have an in tank pump.

[dazclan]

yes its a 90,

[steve_earwig]

Siemens or Bosch? If it's a Semens it'll have the squeezy bulb on the fuel supply, probably up by the r/h suspension tower. I'm fairly certain the 90 is Siemens from about 2002 but I'm not 100% on it.

ECU coolant temp sender should be on the thermostat housing, it seems to be the one with the green connector.

[dazclan]

Hi, it is the Siemens, il give that sensor ago later today & let you no, thanks for all your help,

[dazclan]

hi, again,
i changed that sensor and unfortunatly the problems still there,,,
im starting to wonder if the cars even worth the hassle now,, thanks anyway

[steve_earwig]

A 7 year-old car and you're thinking of binning it? You need to find someone who can read live data from the engine management you do.

[dazclan]

Iv had it over a year now & got it for next to nothing as its an x-taxi with 147000 miles,

iv discovered that it will start with easy start & stay running so im thinking its maybe to do with the pump now,

[Doggy]

As it's a semen job it won't have an in-tank lift pump, but will probably have a strainer which could well be worth checking for blockages. (Though if this happens on an XUD, the primimg bulb goes soft or collapses).