Engine won't start.

Questions specifically about a Petrol powered Citroen C3 (usually engine or fuel related problems).
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Petrol engine related faults, like injectors, error codes, overheating.
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My Name: Babychaz07

Member
Posts: 4
Joined: Thu Mar 07, 2019 12:32 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 150000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Hey guys wondering if anyone can help, have a 1.4 mk1 c3 with a voltage drop at the fuel pump, have changed fuel pump and have got a good earth, any ideas?
My Name: Missing Lincs

Moderator
Posts: 843
Joined: Mon Mar 05, 2012 9:29 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (04)
Engine Size: 1.1
Fuel Type: Petrol
Trim Level: Desire
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Location: United Kingdom
Has thanked: 45 times
Been thanked: 32 times

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Hello Babychaz07

When you say a voltage drop can you explain please. I'm guessing you're measuring the voltage across the pump?

What is the voltage you're measuring?

Apart from you're measuring the voltage drop, is there a problem with the pump and how it's working?

And finally, have you measured the voltage on the wiring at the pump with the pump disconnected?
If at first you don't succeed, destroy all the evidence and pretend you never tried :lol:
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My Name: C3driver52

Guru
Posts: 1854
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 85 times
Been thanked: 65 times

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Babychaz07 wrote: Wed May 15, 2019 1:23 pm have changed fuel pump and have got a good earth, any ideas?
I wouldn't advice changing the pump until it was tested and found to be faulty.

You checked for a good earth,

but did you check for a good +12v supply?
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My Name: C3CAR

Guru
Posts: 2618
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 147 times
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Missing Lincs wrote: Wed May 15, 2019 2:47 pm Apart from you're measuring the voltage drop, is there a problem with the pump and how it's working?
It does seem like we only have half the story.
My Name: Babychaz07

Member
Posts: 4
Joined: Thu Mar 07, 2019 12:32 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 150000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Car wont start, will turn over but not start, battery has been charged, fuel pump works, drops by 2volts at fuel pump. Sorry not very good at explaining
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My Name: C3CAR

Guru
Posts: 2618
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 147 times
Been thanked: 88 times

Post

Babychaz07 wrote: Thu May 16, 2019 9:26 am Car wont start, will turn over but not start, battery has been charged, fuel pump works, drops by 2volts at fuel pump. Sorry not very good at explaining
It sounds like an IMMO - immobiliser fault.

Try the other key will prove that one.

But you also get this with crank/cam sensors and a broken (sheared) cambelt :shock:

Read the codes with a cheap OBD2 reader from here


and it would be worth checking if the cam belt is due for service.
My Name: Babychaz07

Member
Posts: 4
Joined: Thu Mar 07, 2019 12:32 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4
Fuel Type: Petrol
Mileage: 150000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

C3CAR wrote: Thu May 16, 2019 3:41 pm
Babychaz07 wrote: Thu May 16, 2019 9:26 am Car wont start, will turn over but not start, battery has been charged, fuel pump works, drops by 2volts at fuel pump. Sorry not very good at explaining
It sounds like an IMMO - immobiliser fault.

Try the other key will prove that one.

But you also get this with crank/cam sensors and a broken (sheared) cambelt :shock:

Read the codes with a cheap OBD2 reader from here


and it would be worth checking if the cam belt is due for service.
Unfortunately I only have the 1 key :( have had car plugged into a snap on reader and no codes came up so I'm really at a loss
User avatar
My Name: C3CAR

Guru
Posts: 2618
Joined: Wed May 04, 2011 10:01 am
Model: C3 2002-2005, Original shape model
Year: 2002 (02)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 140000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
Has thanked: 147 times
Been thanked: 88 times

Post

Babychaz07 wrote: Thu May 16, 2019 3:45 pm Unfortunately I only have the 1 key :( have had car plugged into a snap on reader and no codes came up so I'm really at a loss
Snapon is not well known for doing well with the finer points of the C3.

If you want to check IMMO problems, I would recommend lexia/diagbox - or a trip to the dealer that uses the same equipment.

One key problems crop up quite often and I have never worked out why anyone would buy a C3 with only one key, considering this is all there is to open it and start it.


If you get 'no faults' then you may have a blown fuse to engine ECU, check the BSM fuses including F3.
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