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Audi a4 2.0 tdi won鈥檛 start


Welsh_ads
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Hi guys and please welcome me into the Audi community. Hello to everyone 馃槀
I鈥檝e got a slight issue with an Audi a4 2.0 tdi with engine code CAG year 2010
now this is what has happened
drove the car fine no problems at all then turned it off went shopping came back out and wouldn鈥檛 start so had the AA come out and have a look and said the fuel pump in the tank isn鈥檛 pumping any diesel so fast forward a couple of days, we fitting another pump in the tank which is pumping out fuel but the car still won鈥檛 start, we鈥檝e also replaced the fuel filters and got fuel up to the HPFP
heres the things I鈥檝e currently checked
fuel getting to HPFP
theres no filling in the HPFP
no check engine light
ive got fuel to the injectors
i used a duty meter for the injectors when cranking and got 8.3% duty
checked the throttle flap wasn鈥檛 stuck shut

is there anything else I should be looking at?

I do really appreciate any help on this one

Thanks in advance

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I鈥檝e just got the vcds on it and when cranking here鈥檚 the readings

Crank position sensor reading 224rpm

cam sensor reading 107 rpm

would this look correct?

thanks

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Welcome to the forum you'll find the members on here are a friendly and helpful bunch 馃檪

Not sure what the figures should be for the cam or crank sensors. Another thought isn't there a fuel pump module? Could this be at fault?聽

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  • 2 weeks later...
On 3/29/2023 at 4:20 PM, Welsh_ads said:

Hi guys and please welcome me into the Audi community. Hello to everyone 馃槀
I鈥檝e got a slight issue with an Audi a4 2.0 tdi with engine code CAG year 2010
now this is what has happened
drove the car fine no problems at all then turned it off went shopping came back out and wouldn鈥檛 start so had the AA come out and have a look and said the fuel pump in the tank isn鈥檛 pumping any diesel so fast forward a couple of days, we fitting another pump in the tank which is pumping out fuel but the car still won鈥檛 start, we鈥檝e also replaced the fuel filters and got fuel up to the HPFP
heres the things I鈥檝e currently checked
fuel getting to HPFP
theres no filling in the HPFP
no check engine light
ive got fuel to the injectors
i used a duty meter for the injectors when cranking and got 8.3% duty
checked the throttle flap wasn鈥檛 stuck shut

is there anything else I should be looking at?

I do really appreciate any help on this one

Thanks in advance

hi,do you have an update on this please hope you got sorted. thanks

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Very good question Stephen.聽
Regrettably, our homeland original poster, hasn鈥檛 returned to the 聽forum since the day he first joined. Will we ever know? 聽
Kind regards,

Gareth.聽

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8 hours ago, alpha omega said:

hi,do you have an update on this please hope you got sorted. thanks

Hi yes it appeared to have 2 failed injectors which didn鈥檛 bring up any codes on the vcds.

bought 2 injectors which supposedly were tested and good but 1 was faulty, the car runs now but has a slightly misfire and still smells but thinking of driving the car to see if the ecu learn the driving characteristics and sorts itself out聽

do you have a similar issue? Maybe I can help

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8 hours ago, Magnet said:

Very good question Stephen.聽
Regrettably, our homeland original poster, hasn鈥檛 returned to the 聽forum since the day he first joined. Will we ever know? 聽
Kind regards,

Gareth.聽

Hi Gareth I may not of returned due to being busy with work but I will reply to any messages and help when I can, if you are ever stuck on a problem please feel free to message

many thanks 馃憤

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