FR won’t start after sitting for 3 weeks

[bruceR]

Hi all, looking for any help
Yesterday I got back from work after 3 weeks away. Got to car and opened it with remote - all seemed ok
Went to start car but only got 2 slow turns of engine then nothing. Tried again and all I got was “click” nothing.
Now I’m thinking flat battery so managed to get a booster charger and tried again, this time the engine started but cut out straight away. Done this another couple of times with the same outcome.
Phoned the AA but after an hour there was no change so the car was towed to a local garage and I’m still at a loss as to why it keeps cutting out.
There is still 1/4 tank of diesel and I’ve also tried to start her with my other keys.
Please help………


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[chriswales6]

May well be the battery or the alternator or both. Had problems with my battery since May because the car isn't used for weeks at a time.

If it cuts out after starting then the alternator may not be charging. Had that happen a few years ago. Worth checking the fuse box on top of the battery before replacing the alternator. A garage replaced a working alternator before finding the melted alternator fuse.

 

[bruceR]

Checked all the fuses both on top of battery and in side panel - all OK
The AA guy also disconnected the battery (said it was a bit low) and then used a booster pack to start the car but with the same outcome - started then cut out
Would it be something to do with immobiliser?
Oh another thing I noticed, there is nothing in the lcds in the dash plus all the dash lights come on and stay on when the key is turned


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[Vaios_Greece]

Maybe a fuel pump error? The engine starts using fuel that has been left in, but when trying to use more, it cuts off cause fuel cannot be sent. Just a thought

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[Alexis27]

Needs a new battery so that needs doing first anyway. Dying but not dead batteries can give all sorts of strange symptoms.

 

[chriswales6]

My fuse box on top of the battery looked fine but it was melted under the largest alternator fuse. Does sound more electrical if your dash is behaving strange. Have you tried scanning it with VCDS.

If it's been sat a while water may have gotten into the ECU wiring in the scuttle panel. That can give lots of electrical problems.

 

[bruceR]

Cheers Chris, yeah tried to check with my scanner but couldn’t get communication with car
The AA guy tried with his scanner but the same


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[chriswales6]

You're welcome Bruce, it's clearly not very happy if it's not responding to a scanner.

Get a decent power supply to it, ideally a fresh battery or fully charge the one on there. If you're going to recharge the existing one, disconnect it from the car. That'll prevent extra current being forced through a questionable system, plus it'll reboot the ECU.

Hopefully it'll work fine once it has over 12 volts to work with.

 

[Yellow fr]

I would change the fuel pump relay as this happened to me if the relay dies you can not get to talk with the engine ecu but you can with the abs ecu


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[Yellow fr]

When new relay is in keep turning the ign on and off till you stop hearing the fuel pump as the fuel filter housing will be full off fuel so the car will start easier


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[bruceR]

Thanks mate, is the fuel pump relay under the dash?? Do you know the relay number??


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[Yellow fr]

Yes it’s under the drivers side you have to remove the panel under the steering column

I know that’s a cupra r but it’s the same to get to it but a different relay number
Sorry can’t remember the number


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[bruceR]

Got it, think it’s the 109 relay

Can anyone confirm.


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[Yellow fr]

It could be I’m not sure
Mine had corrosion on one or two off the metal connectors


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[bruceR]

Put a new battery in and still the same
Ordered a new fuel pump relay 109 so hopefully this sorts it out


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[Reggie Cupra TDi]

...failing this i would try cam sensor, common on the pd150, if you google 'cam sensor', its related to fuelling ect.. mine did same thing, struggled to start and would cut out, replaced with eBay part, still wasn't right, so i took to the garage and they advised on genuine sensor and promised it would sort it, thankfully it did and all is good since it fit 12month ago.

hope this helps..

 

[bruceR]

Can’t understand why there is no lcd info on dash tho


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[Reggie Cupra TDi]

Can’t understand why there is no lcd info on dash tho


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mine never did, you may need to get plugged in to a decent reader.

 

[bruceR]

Sorted
Turned out to be a short in the wiring I fitted for the Auto Headlight switch!!!
So guess I’ll need to look at tidying things up better.
Thanks for replies


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[Yellow fr]

Glad you got it sorted mate


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