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Starting probs. Mk7

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Starting probs. Mk7

Postby mk5mike » Tue Nov 22, 2022 9:20 pm

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
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Re: Starting probs. Mk7

Postby knobby1 » Wed Nov 23, 2022 3:02 am

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
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Starting probs. Mk7

Postby mk5mike » Wed Nov 23, 2022 8:37 pm

Cheers pal. I’ll check Friday morning and get back to you
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Re: Starting probs. Mk7

Postby mk5mike » Fri Nov 25, 2022 10:48 am

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
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Re: Starting probs. Mk7

Postby knobby1 » Fri Nov 25, 2022 8:48 pm

mk5mike wrote: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
2008 2.4L RWD 170+PS 6-speed 350 LWB High Roof.

When I die, I want to go peacefully in my sleep like my Grandfather, not screaming like the passengers in his car..!
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Re: Starting probs. Mk7

Postby Uncle_Fester » Fri Nov 25, 2022 10:01 pm

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.)
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