Starting?

[Clgale88]

Iv had my new 172 cup for about a month now. And sometimes when trying to start it, it wont start just turns over then if you try again straight after its fine. just wondered what this could be?

 

[Jonff]

Faulty TDC sensor (crank sensor) is a common problem that can cause iffy starting issues.

 

[Clgale88]

Cheers JonFF might have to have a look at it clean it up etc.

 

[TimR26]

This happened with my 172. Cleaning the sensor fixed the problem only for it to come back worse couple of months later. You can get a new crank sensor from a motor factors for £25-30.

 

[Clgale88]

Ok cheers

 

[DMS]

And there's a guide in the guides section, just in case you didn't know

 

[Gray]

You can purchase a new/updated TDC sensor and loom from Renault.

 

[noodleman]

i'm havin the same problem!

once it starts it doesnt fail again untill its been stood for a bit.runs normal too once started.
i can agree with the TDC sensor. but i'm just baffled why it starts ok when stood for like only an hour , but after 5-8 hours. it will take 3 or 4 attempts to get it started.
its only started 3 days ago after being perfect starting
if i leave it over night.it defo takes a while to start.never had problems even in the colder weather
i was also sort of thinking a fuel pump prob? like some fuel was leaking back
.as if it needed to pump it back again.. like when you run out of fuel and it takes a while to come though.

if it was the tdc sensor would it not do it more often .on short engine stops and well as long stops?
like i said it seems so much worst when trying it after overnight parking.