Any car mechanics who can help

[Neil]

Renault Clio 1.2 intermittent starting problem
About 50% of the time first thing in the morning it will start ok but other times it won't
Fuel pump is ok
Crankshaft sensor has been changed (as this is a common problem with Clio's)
Battery ok
Immobaliser must be ok otherwise it wouldn't bump start.
But the silly thing is that it bump starts really easy every time so why not when I try to start it.
When it does start by bump starting it works when you turn it off and on but leave it any significant time and it doesn't fire again.

Any sensible ideas as to what the problem might be as this has been going on for a few months

 

[scooter1]

Is the crankshaft sensor the same as the flywheel sensor as this went on my old Clio. It would either fire up first time, or just turn and turn.
I never bump started it as I thought this might damage the CAT

 

[Vegas Seagull]

Ask Nicole

 

[surrey jim]

Have you tried turning it off and on again

 

[wehatepalace]

Is it and injection model ? As it sounds like you may have an injector failing, allowing fuel to gravity feed away from the engine when its switched off.
Either that or the lift pump (lifts fuel from the tank to the fuel pump) although I'm not sure if Clios have these.
I would certainly get someone to run a leak off test on your injectors if it has them.

 

[StonehamPark]

Alternator?

 

[grubbyhands]

If it has had the latest crankshaft position sensor AND corresponding loom SOLDERED in then ,in my experience,if the battery isn't 100% then it won't go. Have the battery professionally (digitally) checked.

 

[JCL - the new kid in town]

i had a 1990 clio years ago and had some issues starting and i think it turned out it was the starter motor was half shot.

 

[World of Sport]

If it turns over and and but starts intermittently its the cankshaft/flywheel sensor, check the wiring loom hasn't been changed before, Renault's do a modification, do yourself a favour and get the sensor and the plug/wiring loom from Renault.