Car won’t start.

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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steve2003rs6
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Car won’t start.

Post by steve2003rs6 » Fri Mar 18, 2022 11:15 am

Jumped in the car this morning. Car turns over but won’t fire.
Out in it all day yesterday and not a problem.
No faults on auto scan logged.
Anyone got time to help ?

srichards
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Re: Car won’t start.

Post by srichards » Fri Mar 18, 2022 11:28 am

Who said something rude about it within earshot???

First thought with mystery not starting and no codes is immobiliser issue. Or fuel pump relay.

Is trying to catch or just doing the dry sounding churn?

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Shoppinit
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Re: Car won’t start.

Post by Shoppinit » Fri Mar 18, 2022 11:31 am

Could be crank position sensor.

Also, check your fuse 29 to make sure it hasn't blown. Unlikely but it would result in the symptoms you describe.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Shoppinit
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Re: Car won’t start.

Post by Shoppinit » Fri Mar 18, 2022 11:34 am

Often with the crank position sensor it will start after a few tries. Don't overheat your starter motor.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

steve2003rs6
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Re: Car won’t start.

Post by steve2003rs6 » Fri Mar 18, 2022 11:40 am

Hi Ben this is after changing central locking code.
I have changed it back to where it was.
Was wondering if that has anything to do with it.
For example immobiliser ?
RAC due within 4 hours.
Dry churn sound. Not even trying to fire up.

Then again I used the car all day yesterday without any problems.

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Shoppinit
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Re: Car won’t start.

Post by Shoppinit » Fri Mar 18, 2022 11:47 am

The CCM shouldn't make any difference to the immobiliser. You can always change it back to what it was to see if that makes a difference, but I'd be extremely surprised.

Check fuse 32, also.

Give Grizz a call. You must be his best customer.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

srichards
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Re: Car won’t start.

Post by srichards » Fri Mar 18, 2022 11:48 am

If it was used yesterday ok after messing with the central locking it shouldn't be that.

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Shoppinit
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Re: Car won’t start.

Post by Shoppinit » Fri Mar 18, 2022 11:49 am

Sometimes engines flood and the only way to get them to start is to pull the fuel pump fuse and turn the engine over until the fuel is expelled. I've never had this with the RS6 but I've had it on plenty of other cars.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

srichards
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Re: Car won’t start.

Post by srichards » Fri Mar 18, 2022 11:51 am

If it has flooded you should be able to smell fuel.

Is the SAI still on it or mapped out?

steve2003rs6
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Re: Car won’t start.

Post by steve2003rs6 » Fri Mar 18, 2022 12:01 pm

Sai is still on.
This car has been the most reliable car I have ever owned. So this is a real bummer !

srichards
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Re: Car won’t start.

Post by srichards » Fri Mar 18, 2022 12:04 pm

steve2003rs6 wrote:
Fri Mar 18, 2022 12:01 pm
Sai is still on.
This car has been the most reliable car I have ever owned. So this is a real bummer !
:shock:

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Shoppinit
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Re: Car won’t start.

Post by Shoppinit » Fri Mar 18, 2022 12:11 pm

Did you check the fuses?

Have you tried several times to start? Better put the battery on charge as a precaution.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

steve2003rs6
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Posts: 2956
Joined: Mon Aug 19, 2019 7:43 pm

Re: Car won’t start.

Post by steve2003rs6 » Fri Mar 18, 2022 12:14 pm

Fuses 29 and 32 engine management.
Just located them and going to check them.

Yes tried several attempts to start. No luck.

steve2003rs6
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Re: Car won’t start.

Post by steve2003rs6 » Fri Mar 18, 2022 12:44 pm

Both fuses are intact.

Astrosquirrel
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Re: Car won’t start.

Post by Astrosquirrel » Fri Mar 18, 2022 12:59 pm

Just throwing it out there: Fuel pump? :)

Do you hear it prime when opening the door after a while closed & locked?. Does it prime when ignition on?

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