2003 renault laguna will not start

aidan313

hi all i hope ur day is better than mine .... any way i own a 2003 renault laguna II 1.6 petrol and it would not start so i bought a new crankshaft sensor and put it in to no avail still will not start , it sounds like a flat battery but i took the battery out and tried it in a different car and it started so what am i missing here

martinr5232

See will it go with a push or a tow likely a starter problem providing you have ignition lights.

aidan313

martinr5232 wrote: »

See will it go with a push or a tow likely a starter problem providing you have ignition lights.

I have ignation lights on when put in card it turns over slow and fails to start but when I push it its starts I'm at my wits end wit it

jimgoose

You're missing a fault-code scan.

aidan313

jimgoose wrote: »

You're missing a fault-code scan.

What is a fault code scan

jimgoose

aidan313 wrote: »

What is a fault code scan

A diagnostic tool connected to the OBD port (usually near the steering-wheel base somewhere) to read and report any fault-codes logged by the ECU. This is usually a good place to start, as it will tell you what the machine "thinks" is wrong.

aidan313

jimgoose wrote: »

A diagnostic tool connected to the OBD port (usually near the steering-wheel base somewhere) to read and report any fault-codes logged by the ECU. This is usually a good place to start, as it will tell you what the machine "thinks" is wrong.

O can't afford to get it done

jimgoose

aidan313 wrote: »

O can't afford to get it done

Where are you?

aidan313

im in cavan

jimgoose

aidan313 wrote: »

im in cavan

Too bad! I'd scan it for you if you were around Caaark, bah!

aidan313

see that my problem ... the lights show on dash but when i press start button it cranks over slowly but when i let it roll down the hill and jump it that way it goes and then some times it will start straight away after

jimgoose

aidan313 wrote: »

see that my problem ... the lights show on dash but when i press start button it cranks over slowly but when i let it roll down the hill and jump it that way it goes and then some times it will start straight away after

Check the at-rest and charging voltages across the battery terminals.

aidan313

the battery seems fine i put it in my ford mondeo and it started first turn of key which is why i think it starter motor

jimgoose

aidan313 wrote: »

the battery seems fine i put it in my ford mondeo and it started first turn of key which is why i think it starter motor

Is that why you replaced the crankshaft position sensor?

aidan313

i done that because i read it could be that im so frustrated

jimgoose

aidan313 wrote: »

i done that because i read it could be that im so frustrated

Faulty CPS nearly always means no start at all.

aidan313

whats that

aidan313

whats that never mind my head is all over the place could i have it in wrong

slimjimmc

aidan313 wrote: »

see that my problem ... the lights show on dash but when i press start button it cranks over slowly but when i let it roll down the hill and jump it that way it goes and then some times it will start straight away after

Sounds like a faulty starter motor or a poor electrical connection.
Check the lead from the battery to the starter is ok and connections are clean. Also check the earth strap from the engine to the body.

If the car starts on a push or roll then the crank sensor is fine and there is enough power to run the ECU and injectors.

aidan313

thats what im thinking but was not sure and ur the third fella to say that .....thank you very much for the help really appreciate it