Starting woes - any ideas?

[Mostro]

2003 172

Just recently my 172 has occasionally needed a second turn of the key to start, after turning over but not catching the first time. It has always started immediately on the first turn and still does 90% of the time.

This morning it started immediately and I drove half a mile to drop my daughter off. A minute later, it turned but wouldn't catch for five attempts. Finally on the sixth try it fired to life immediately,

Anybody had similar symptoms and know what's about to fail and leave me stranded??!! :S


[I know this has been covered before but it's a difficult nondescript thing to search on!]

 

[Mostro]

OK, so further research suggests it could be a TDC sensor issue, failing battery or key/immobiliser problem.....

Do any of these things just occur intermittantly?

 

[ForceIndia]

My brother had this on his 172, intermittent starting etc. New battery sorted it.

 

[Mesa]

TDC
Coil(pack)
Fuel Pump Relay?

 

[jezcharger]

Cam sensor- common fault i've heard

 

[Mostro]

OK so I've had the airbox out and the TDC sensor out - does this look dirty? It's the original one (black connections)

Also battery seems to be OK: 12.6V at rest, even though it is also the original from 2003!

 

[Mostro]

Anyone? This look dirty?

Not had the starting problem since I had this out on Friday so I may have sorted it?!

 

[Sean6545]

Get the modified crank sensor and loom on there, You wont see anything wrong with the cranksensor its self.

 

[kevin.s]

where do you get them from mate? is it just what renault have replaced the old type with.

 

[Sean6545]

Yes, you can get them from renault. The new parts are blue in colour.

 

[Mostro]

Get the modified crank sensor and loom on there, You wont see anything wrong with the cranksensor its self.

Ahhh, gotcha.

Been fine since I pit it back together mind. (must be a first!)

cheers

 

[Mostro]

And 2 years on it's never missed a beat. Just feedback for future reference.