Starting probs. Mk7

[mk5mike]

Hi guys Mk7 starting problem when I go to start it it will turnover and turnover and turnover and then try a second time it does the same I’ll try on the third or fourth time and it will fire in straight away. Run and start all day with no problems I’m thinking diesel problem any ideas? Thanks a lot cheers guys mike

It’s a 58 plate registered February 09 and also a recovery truck

[knobby1]

Sounds like air in the system. Injector leak-off lines and O-rings, cracked filter head, filter head fittings have O-rings and it's possible for air ingress.

Check the fuel filter first thing in the morning, if it's empty, you've found your issue.

Lord Knobrot

[mk5mike]

Cheers pal. I’ll check Friday morning and get back to you

[mk5mike]

Hi pal

Firstly. Thanks for your time

Checked filter and fuel there, went to start it and just turned over for around 10 seconds and nothing. It did this twice and on 3rd time it fired in without issue

Tried it again and turned over twice without starting then fired on third crank. Strange

[knobby1]

Hi pal

Firstly. Thanks for your time

Checked filter and fuel there, went to start it and just turned over for around 10 seconds and nothing. It did this twice and on 3rd time it fired in without issue

Tried it again and turned over twice without starting then fired on third crank. Strange

Are you getting cam/crank sync when cranking..??

Lord Knobrot

[Uncle_Fester]

Had a similar thing on a Renault dci with about 90k on the clockturned out to be injector no2 sticking open , therefore no fuel rail pressure,

(Mk7 2.2tdci jumbo highroof twin wheel 17 seat minibus.)

[mk5mike]

Hi guys. Been working on this a while

Changed injectiors, pipes, fuel filter and housing done learns. Still the same

Any ideas

[knobby1]

Hi guys. Been working on this a while

Changed injectiors, pipes, fuel filter and housing done learns. Still the same

Any ideas

Loading up the parts cannon and throwing parts at it won't help, you need to find out why.

Are you getting cam/crank sync during cranking..?? What FRP are you getting during cranking..??

Why did you change the injectors..?? Were they coded to the PCM..??

Lord Knobrot

[mk5mike]

hi

i drove it home yesterday and started without fault, no issues driving went to it today and no start, what do i need to buy to test the pressure???

i have taken the pipe off that connects to the FPR and nothing comes out on cranking

[mk5mike]

Just had it on my forscan and saw codes

P125a
P037d
And p608a

Thanks in advance for your help

Mike