VW Polo 9N3 2007 1.4 TDI Wont Start

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Gaz_05
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Posts: 2
Joined: Sun Jun 16, 2019 11:43 pm
Drives: VW Polo 9N 2007 1.4 tdi
Location: Winsford

VW Polo 9N3 2007 1.4 TDI Wont Start

Post by Gaz_05 »

Hi there, new member, hope i have done this correctly. I had a look through lots of posts, but nothing conclusive..

I have a 2007 VW Polo 1.4 tdi engine code BNV - the one with turbo and tandem fuel pump.

The problem i had was the engine stopped when hot, I pulled over for 5-10 mins, (abs light came on !?) tried to start again and started ok - abs light off, have been driving since no problem for a day. Then the car was sat at idle and again it stopped (abs light on again) left for 5 mins and started ok - abs light off. Then driven again from cold, left a couple of hours and now just turns over ok, but will not start, iv'e checked fuses, the 109 relay is a newer grey one (not checked) but assumed ok at this point.
Not certain if I should hear the fuel pump gush when ignition is first turned on to prime system or not - does anyone know or can test theirs, i have had my hand on the top of the fuel pump (external to the tank) when we have switched on the ignition, but cant feel any vibrations or hear anything? need help please.
Gaz
Gaz_05
New
Posts: 2
Joined: Sun Jun 16, 2019 11:43 pm
Drives: VW Polo 9N 2007 1.4 tdi
Location: Winsford

Re: VW Polo 9N3 2007 1.4 TDI Wont Start

Post by Gaz_05 »

On this car does anyone know if I should hear the fuel pump start and fuel gush when the ignition is first turned on to prime system or not or can someone with the same test please ?
kev70
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Posts: 1
Joined: Sun Apr 05, 2020 11:21 am
Drives: 2006 vw polo 1.4 tdi
Location: midlothian

Re: VW Polo 9N3 2007 1.4 TDI Wont Start

Post by kev70 »

I have the same problem.(polo 2006 1.4 tdi) My fuel pump used to always make a noise when ignition put on but no longer does it and car wont start. changed the fuel pump and still nothing. changed the relay and still nothing

any ideas? thanks
doob
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Posts: 2
Joined: Wed Apr 08, 2020 2:33 pm
Drives: 1.4tdi bluemotion 2008
Location: Rochester

Re: VW Polo 9N3 2007 1.4 TDI Wont Start

Post by doob »

I'm in the same boat but mine starts after 3 attempts. Anybody found a solution to this?
moffa13
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Posts: 3
Joined: Tue May 12, 2020 8:26 pm
Drives: 9N3
Location: Belgium

Re: VW Polo 9N3 2007 1.4 TDI Wont Start

Post by moffa13 »

Hello,

when you turn the ignition on, you should hear the fuel pump prime for about 2 seconds.

The ecu controls that, does your glow plug light shows up when ignition on ? If not, ecu is not responding.
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