Struggles to start

[Diagro]

hey

In the morning or when left a while the 172 struggles to start. takes a good 5-6 Seconds of cranking to come to life and then does so very rough.

But as soon as it has started and revs over 1k its perfect.

can turn it off and restart fine.

Do you think this could be a fuel pressure issue on start up? or a leaky injector?

 

[ADS_V6]

tdc sensor,coolant sensor?

 

[Diagro]

How would they cause it to struggle? I have no idea

 

[ADS_V6]

i had a problem last year wouldnt start for a few seconds in cold and when engine was warm i replaced the tdc and loom,but it was my coolant sensor as soon as that was changed car was fine.I think it sends messages to the ecu so if they are faulty it wont start.Is the trip computer resetting itself as battery casuses problems aswell m8

 

[Diagro]

Oh I see.
Trip computer is fine, battery is good as tested it.

just seems to sound like it's starting but sounds like what a lawnmower sounds like when fuel is very low or empty.
then it will burst into life and until I leave it for several hours. Then once left will do it again.

I just orderd a new tdc sensor and will get a coolant sensor. All easy to change YEA?

 

[ADS_V6]

yes but i got the tdc and a new loom from renault as the loom can cause problems i believe

 

[Diagro]

Ok mate.

Will report back when got the sensors fitted

 

[ADS_V6]

hope it helps i dont know what else to try im no expert but it sorted mine