Engine turns over but 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: RPJ

Member
Posts: 2
Joined: Mon Jul 16, 2018 2:00 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: I dont know
Fuel Type: Petrol
Mileage: 80000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

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Hi all,
Fist time here, I hope I can be clear with my problem :roll:

My C3 2006 petrol, won't start when I turn the ignition on. It sounds as if it doesnt have any fuel but the tank is half full (or half empty :D ) A couple of weeks ago I found the clock back to 01 Jauary 2009. Could this be a faulty battery?
It is also giving me an Economy mode message even after the car has been off all night. I try the reseting of the computer but no joy. After that reset, the only improvement was that the Eco Mode message was gone but the swipers are going crazy, they seem to have come to life on their own!
I also changed the key battery but it didn't make any difference, and pushed dwon the road to start it that way but it didn't start either.

Any ideas guys as to what is happening?

Thank you so much!
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My Name: Arfur Dent

Guru
Posts: 3547
Joined: Sat Jul 23, 2011 3:47 pm
Model: C3 2002-2005, Original shape model
Year: 2002 (52)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 100000
Trim Level: Exclusive
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: DV4 16-valve diesel (90 PS)
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RPJ wrote: ↑Tue Jul 17, 2018 10:10 am Hi all,
Fist time here, I hope I can be clear with my problem :roll:

My C3 2006 petrol, won't start when I turn the ignition on. It sounds as if it doesnt have any fuel but the tank is half full (or half empty :D ) A couple of weeks ago I found the clock back to 01 Jauary 2009. Could this be a faulty battery?
It is also giving me an Economy mode message even after the car has been off all night. I try the reseting of the computer but no joy. After that reset, the only improvement was that the Eco Mode message was gone but the swipers are going crazy, they seem to have come to life on their own!
I also changed the key battery but it didn't make any difference, and pushed dwon the road to start it that way but it didn't start either.

Any ideas guys as to what is happening?

Thank you so much!

A petrol engine needs fuel passing through the injectors, compression from the engine and a spark all happening at the right time for an engine to start and run.

You could have bad injectors, bad ECU that controls the injectors, no spark from the coils or a cam belt failure. Other things like bad cam/crank sensors or a bad key that is missing it's immo chip (Transponder chip) can all give similar symptoms, where it turns over but doesn't start.

I suppose, if it were me, I would grab my OBD reader (from amazon) and check for injector, cam/crank errors. But that is just a start. You need a spark, fuel and the cam belt doing its thing for it to start.
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My Name: RPJ

Member
Posts: 2
Joined: Mon Jul 16, 2018 2:00 pm
Model: C3 2006-2009, Facelift model
Year: 2006 (06)
Engine Size: I dont know
Fuel Type: Petrol
Mileage: 80000
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)

Post

Hi.
Guys. I have a similar problem to the original post. I changed the com2000 ( as my dog likes my hand cream and chewed th light wand) and since then the car won't start and swipers are doing their own thing. The original part says COM2005 the one I replaced it with says COM2002. All the connectors seem to be the same but the ***** car won't star!. I mean the ignition goes ok but it sounds as if it has no fuel, which it does, and it simply the engine won't start.
So do I need the exact same part for the car to work? I am sorry if this a silly question but I haven't got a clue about what I'm doing. I'm not a mechanic and I'm not a blonde either :oops:
That B&B you so much guys!
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My Name: C3driver52

Guru
Posts: 2013
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: 146 times
Been thanked: 78 times

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RPJ wrote: ↑Tue Jul 17, 2018 6:36 pm Hi.
Guys. I have a similar problem to the original post. I changed the com2000 ( as my dog likes my hand cream and chewed th light wand) and since then the car won't start and swipers are doing their own thing. The original part says COM2005 the one I replaced it with says COM2002. All the connectors seem to be the same but the ***** car won't star!. I mean the ignition goes ok but it sounds as if it has no fuel, which it does, and it simply the engine won't start.
So do I need the exact same part for the car to work? I am sorry if this a silly question but I haven't got a clue about what I'm doing. I'm not a mechanic and I'm not a blonde either :oops:
That B&B you so much guys!
If you changed a part because a dog chewed it but the car still started and with the new part it won't start then change the part back to see if it starts. That would be the best evidence the the changes you made have caused the problem and would then lead you to a solution.
RPJ wrote: ↑Tue Jul 17, 2018 10:10 am I also changed the key battery but it didn't make any difference
It wouldn't anyway , but you didn't mention this change of the COM2000 unit in your original question. :idea:
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