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Matt
Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 20576
Experience:  BEng hons Mech engineering, in auto industry 22 years
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53 reg corsa 1.0 wont start from cold- throttle body clicking,

Customer Question

53 reg corsa 1.0 wont start from cold- throttle body clicking, will start when it is warmer
Submitted: 1 year ago.
Category: Car
Expert:  Matt replied 1 year ago.


this could just be the battery voltage is low - the cold weather puts a lot of extra load onto the battery so try charging the battery or consider replacing it if its more than 5 yearrs old

if this is OK then it could also be incorrect fuelling due to a faulty water temp sensor. If this is the problem then the ECU will never add the 'cold start' extra fuel required if the car starts OK when warm then I 'd look into changing the sensor.

Customer: replied 1 year ago.

Car has new battery,replaced fuel filter, crank shaft sensor, complete new exhaust,replaced spark plugs which are sooting up

Expert:  Matt replied 1 year ago.


Ok

in that case try a new coolant / water temperature sensor as I suggested and also

check leaks before the O2 sensor as if this has been experiencing an exhaust leak then it will have been running very rich as the sensor will see the extra air pulled in as fresh / lean fuelling and be adding fuel to compensate.

This can lead to catalyst failure as the extra fuel can re-light inside and melt the catalyst

The best way to find an exhaust leak is to run the engine from cold and feel around the exhaust joints with your bare hands - you'll have about 30 seconds before it all gets too hot and you should feel any escaping gas blowing over your fingers

Expert:  Matt replied 1 year ago.

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