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Hi!

My lupo didnt start 2 weeks ago so i used vagcom & i got fault code G28 Engine speed sensor.

I replaced the sensor & it still doesnt start. Error code is gone.

After that vagcom gave me error code:

18010 - Power Supply Terminal 30: Voltage too Low

        P1602 - 35-10 - - - Intermittent

This error code usually comes after disconnecting the battery.

but just to be sure i replaced the battery because it was still a old full calcium one.

So what i replaced from the ignition : ( new parts )

Battery , coil pack , spark plugs , engine speed sensor (Crankshaft sensor) (G28), all ignition cables

No more vagcom codes & car wont start, it just keeps cranking.

Only thing i can think of now is the starter motor, i dont know if they give error codes?

what u guys think?

thanks!

 

 

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check all the earth connections from battery to chassis, and other earth connections you can find, simply find them all clean them up and stick them back on, a bad earth is just as bad as a bad live connection

 

if it its cranking its unlikely to be the starter motor, unless its quite obviously cranking slow, check for spark then check for fuel

Edited by Mobieus_uk
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12 minutes ago, Mobieus_uk said:

check all the earth connections from battery to chassis, and other earth connections you can find, simply find them all clean them up and stick them back on, a bad earth is just as bad as a bad live connection

 

if it its cranking its unlikely to be the starter motor, unless its quite obviously cranking slow, check for spark then check for fuel

I now think its maybe a fuel problem because i keep starting over & over the spark plugs dont get wet.

also read something about a blown fuse but i think they give error codes on vagcom.

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20 hours ago, Mobieus_uk said:

can you hear the fuel pump kick in when you turn on the ignition?, if not check the fuses

Checked all my fuses today & they are all okay.

dont really know what sound a fuel pump should make.

ive read today the fuel pump or fuel relay dont give a vagcom code so this can maybe be the problem.

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21 hours ago, Rich said:

if you chuck 12v at the fuse you will know.

 

 

i checked the fuel pump fuse voltage & it only gets 3 volts.

 

EDIT !!!

When i crank the car the fuse gets 12V.

 

so the fuel pump relays clicks when i turn on the ignition

where can the problem be?

thnx!

Edited by Polo6C
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flip passenger seat, undo three screws on a cool looking black panel.

turn the ignition on and listen for a noise.

if you hear nothing take the plug off, check the brown and red plugs have 12v.

**** the top of the pump if necessary.

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1 hour ago, Rich said:

flip passenger seat, undo three screws on a cool looking black panel.

turn the ignition on and listen for a noise.

if you hear nothing take the plug off, check the brown and red plugs have 12v.

**** the top of the pump if necessary.

I have checked it & the red wire gets 12V when i crank the engine.

the brown wire gets nothing. 

i tested the other 2 wires & the purple one gets voltage too 

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54 minutes ago, Rich said:

brown = earth.

no voltage.

Whilst on the face of it most of us would already know that... 

5 hours ago, Rich said:

flip passenger seat, undo three screws on a cool looking black panel.

turn the ignition on and listen for a noise.

if you hear nothing take the plug off,check the brown and red plugs have 12v.

**** the top of the pump if necessary.

 

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16 minutes ago, Pete said:

Well if it's supposed to be getting 12v and it's only getting 3v I'd start looking at that instead of the pump.

it gets 12v when i crank the car & 3v with contact on. is it supposed to get 12v then?

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I'm not sure, I would've thought it should get 12v the whole time when it's operating, like when it kicks in the prime the system when you open your door. Have you tried taking the fuel filter line to the engine off and seen if fuel is pushed through the filter when the car is cranking?

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18 minutes ago, Pete said:

I'm not sure, I would've thought it should get 12v the whole time when it's operating, like when it kicks in the prime the system when you open your door. Have you tried taking the fuel filter line to the engine off and seen if fuel is pushed through the filter when the car is cranking?

i just tested that & there is no fuel comming trough.

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