My Clio has been towing to start in hot weather spark plugs have been changed any more ideas as to why?

i've changed the spark plugs it seemd fine but on a really hot day it has to be bumped to get going, up until this really hot weather the cars been so reliable!

Answers:
i drove a clio in SA with 40degree weather.face it your car just needs a service you poms can't blame everything on the damn hot weather! will you ever be happy?!
Battery?
take it to agarage
genrally look at the main 4 items, fuel pump and fuel filters
, injectors- value senors for these so the mixture is happening correctly, air intake make sure its clear and clean, battery make sure its charging and new
Ignore the other stupid anwers exept (hi0silver) they are just after points - you have a fueling problem where the sensor is being affected by the heat and you have some kind of fuel evaperation.
Electricity hates heat. If your wires runing from the battery to the starter are too hot, the electricity doesn't want to move. Change the wire from 12 volt to 6 volt. 6 volt is thicker so it it better insulated.
If the car is bump starting, then there is no problem with the fuel system or ignition system.

The problem is either the battery, the starter motor, the starter solenoid (on the top of the starter motor) or the wiring for these.

Its unlikely the hot weather is a factor - the Clio was developed to work in all Renault markets, many of which are much warmer than the UK (e.g. central Spain).
Good lord, such answers.
If you can bump start it, it means there is not enough energy to "crank"the engine. First place to start is get the battery checked or changed. If it is ok, look at the alternator, which keeps the battery charged. If IT is ok, look at a possible cause of the battery being drained. Favourite is a light left on (a door could be sticking and not closing properly, leaving an interior light on maybe in a hidden place like the boot) or a minor short. You really need a mechanic as there are so many possible causes.
thats weird- we have a clio and it stays in turkey where the weather is hotter and the roads much harder to tackle, yet we have never come across this problem. check the water levels in the car, park it in the shade, and take the car to a garage. dont worry too much- it happens to the best of us!
Check tappet clearances you will probably find the inlet clearances are almost zero.

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