The problem of cold starting the engine.

[JARR]

I had same trouble. Check IAC valve on throttle body, it´s almost sure that valve is sticking when cold.

[petrified.rabbit]

if you can crank and crank, and get no smell of petrol. than i would be willing to bet you have a fuel pressure problem.

this could be a number of things, but check your fuel pressure without turning on the car at all (after it sits like you would try to have a no start) record the reading, then attempt to start the car so it does not start, and check the pressure again (or during if you have two people and a active gauge). record that, then start the car, and see what it goes to.

Lack of fuel could be a fe things, some things to check would be the fuel pump relay, (might not be kicking on), an aftermarket fuel filter, or bad evap system (even fuel cap) that lets the tank depressurize and leak back down from the rail.

I have also not verified this personally to the aveo, but a slow/bad oil pressure sensor would/could cut fuel, if after sitting your oil pressure does not exist it isnt going to start. but would build up while you cranking over to allow it to start the second time.

[metr]

Thanks, the Rabbit! Most likely the problem in the valve which doesn't hold fuel and it flows down back in a petrol tank, forming an air stopper in a stage. I will check up it when I will park the car on a slope. Where to be this valve?

[metr]

All filters are new and original, including the fine filter fuel pump(the one inside). Oil pressure switch is likely an issue with faultyotherwise starting the engine would be constant, and did not arise until after prolonged parking. Be sure to measure thepressure of the instrument will Skan100. I see this problem in the valve.

[metr]

This detail? 96477404

[petrified.rabbit]

if you replaced the fuel filter and pump, check the seal in at the top of the tank, that could be the leak.

And the reference to the oil pressure was the same, the switch could be sticking, or the oil pump could be draining down. I will research it further, but since it is an issue on the start circuit and not run, the oil pressure might not matter.

check fuel pressure.

[metr]

I changed only the filter in a gasoline pump and the fuel filter has put All as it was primary and reliable has fixed. The gasoline smell in salon isn't present. It is interesting, why always instantly the engine starts from the second time?

[petrified.rabbit]

if the fuel system is depressurized the engine will not have gas the first time you try to start it, but the start attempt will pressurize the system to allow it to start the second time.

I am only going with this theory because you say there is no smell of fuel.

[metr]

Thank you all, respect for individual rabbit! The story is over, the problem was hidden in the petrol pump. There was no pressureof sufficient force. Today in the service changed the fuel pumpChevy warranty. Maybe this information will be useful to someone. Thank you all.

[Daox]

Glad to hear you got it fixed up.