Mk7 2.4 transit hot start problem

[Yz Garry]

Hello I have 2008 ex rac 2.4 transit and from hot it will not start it turns over but no start unless I use easy start its had new injectors seals new temp sensor new start motor new fuel filter and still not change it starts from cold spot on and runs fine just will not start from hot. Any help would be appreciated

[DanMK7uk]

Is the fuel filter full ?

Have you got diagnostics to check for codes and fuel rail pressure?

Does it stay running on sniff or does it cut back out ?

[Yz Garry]

I have not checked if fuel filter is full I will have look and it’s not giving any codes. Once it’s running it stays running and drives fine.

[DanMK7uk]

I have not checked if fuel filter is full I will have look and it’s not giving any codes. Once it’s running it stays running and drives fine.

Start by checking filter is full, when at fault.. if its not full fill with fresh diesel and try again. Can take a couple of fills sometimes.

Id be checking what your rail pressure is while cranking, when at fault 300 bar it should be. Do you have live data function
On your equipment?

[Yz Garry]

I have no way of checking fuel pressure with my diagnostics tool so I would have to get it booked in and I checked fuel filter and it was full. Thanks for replying back.

[DanMK7uk]

I have no way of checking fuel pressure with my diagnostics tool so I would have to get it booked in and I checked fuel filter and it was full. Thanks for replying back.

You can probably rule out air ingress then…

Could really do with checking for any codes and live rail pressure

Have you got a windows laptop ?

You can download the forscan diagnostic for free and get a cheap 30 quid obd adapter online. Best equipment for our vans.

https://www.amazon.co.uk/Vgate-vLinker- ... B0952P4MLP

https://forscan.org/download.html

[Yz Garry]

Yeah I have just ordered forscan and adapter of eBay now.

Last time I had this issue it was starter motor so when it started doing it again 1st thing I done was get starter motor changed over as it was still under warranty but it was still the same after changing and I can’t see it being bad starter being new.

[DanMK7uk]

Yeah I have just ordered forscan and adapter of eBay now.

Last time I had this issue it was starter motor so when it started doing it again 1st thing I done was get starter motor changed over as it was still under warranty but it was still the same after changing and I can’t see it being bad starter being new.

Yes often starters play up when hot, the heat from the engine when hot. They pull silly loads and often show up when hot when worn… fact yours runs on sniff certainly points towards fueling… definitely start with cranking rail pressure bud, SY diagnostics on youtube for the setting the v linker up is helpful. Shows how to do it all.

[Yz Garry]

Hello sorry be pain again but over the weekend I have checked the fuel filter 3 times and it’s only been half full ? I am still waiting on forscan what be here tomorrow

[knobby1]

Hello sorry be pain again but over the weekend I have checked the fuel filter 3 times and it’s only been half full ? I am still waiting on forscan what be here tomorrow

If the fuel filter is emptying, you have air ingress, either at the filter head or downstream of it towards the engine. Hard to start when hot is usually the starter motor not happy....fairly common.

When was the fuel filter last replaced..?? When were the learns last done..??

What code reader was used..?? Most of them can't cope with the Transit protocols. Forscan will get you sorted.

Lord Knobrot

[Yz Garry]

Fuel filter was changed again yesterday and it’s only cheap scanner I have at moment and it’s not bringing any codes up but I have forscan coming what should be here tomorrow.

[DanMK7uk]

Was filter emptying before replacing it with an alternative or not ? Did you check the other day when i mentioned it ?

Cheap filters can fail to seal well if not a decent brand.. ie ford, mann or bosch.

Check filter housing for cracks with a torch etc..

Injector leak off pipe seals (little green ones) are a common area.

All pipeline connections/ make sure nothing has rubbed/ worn a pinhole through. Any of the low pressure pipes.

[Yz Garry]

The other day when I checked filter was full but Saturday morning I checked again and the filter was half full so I put new filter back on filled with diesel van starts spot turn it off go to start again no go check filter it’s half full again fill with diesel and it go again.

[DanMK7uk]

The other day when I checked filter was full but Saturday morning I checked again and the filter was half full so I put new filter back on filled with diesel van starts spot turn it off go to start again no go check filter it’s half full again fill with diesel and it go again.

Most definitely air ingress confirmed then..

Check the bits mentioned previously and hopefully your find it with out much bother…

Being under Vacumn, fuel wont leak but air will get in. So can be a mare sometimes..

[Yz Garry]

ok I will check everything again tomorrow and see if I can come cross anything thank you