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I have a 03 307 1.6 petrol. The car runs fine with no issues and no engine management light. After a journey and it has got up to temperature it won't start until it cools down. The engine spins over but just won't start. Any ideas.
 

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I have a 03 307 1.6 petrol. The car runs fine with no issues and no engine management light. After a journey and it has got up to temperature it won't start until it cools down. The engine spins over but just won't start. Any ideas.
Possible temp sensor fault. Car might think it's dangerously hot and won't start till its cooled.

Will need plugging in ideally as you could change a bunch of bits before getting the right one.

Does the 'STOP' warning flash on the dash when it won't start?

If not you could try replacing the spark plugs as these may fail when hot.
 

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If you can get it on a code reader check from crank sensor signal. Sometimes crank sensors breakdown when hot and at starter RPM do not pickup crank movement and therefore ECU does not know engine is turning.

Another test is no diagnostics is to tow it and see if it starts when revs are greater than about 500 RPM or spray sensor with electrical freezer spray and see if it starts
 

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Discussion Starter #4
Possible temp sensor fault. Car might think it's dangerously hot and won't start till its cooled.

Will need plugging in ideally as you could change a bunch of bits before getting the right one.

Does the 'STOP' warning flash on the dash when it won't start?

If not you could try replacing the spark plugs as these may fail when hot.
No the STOP light doesn't flash.
 

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Discussion Starter #5
If you can get it on a code reader check from crank sensor signal. Sometimes crank sensors breakdown when hot and at starter RPM do not pickup crank movement and therefore ECU does not know engine is turning.

Another test is no diagnostics is to tow it and see if it starts when revs are greater than about 500 RPM or spray sensor with electrical freezer spray and see if it starts
Will try towing it. I have gone to start it this morning and it won't fire at all, still turning over.
 

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Unfortunately the quickest and easiest way is to get it plugged in.

An auto electricial can do this for about £40 unless you have someone near you with Planet.

It'll hopefully save you a lot of head scratching and time.
 
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