The problem of cold starting the engine.

Dear friends! I need your help! My Aveo has ceased to wind upthe first time after a long stay in a few hours. The second timestart up easily. Please help solve the problem of cold start.!Thanks in advance!

Welcome to the site.

Do you have any engine codes?

No, my friend, no diagnosis has no effect!

Already tried everything: replacing all filters, spark, throttleassembly washed. Russian forum Aveo does not know the answer to my question. I'm disappointed.

the coolant temp switch "sounds" like the problem.

but a little issue with translation, "wind up" means crank over with the starter? or it cranks but does not start?

if it cranks but does not start, it could be there is no fuel pressure in the rail the first time you do it, do you hear the pump purging when you put the key in the one position?

I tried to run the engine until the fuel pump to pump after waitingin gasoline ramp, no effect it.

Sorry for my English!

The problem with starting the engine occurs only after a longparking lot, after about 8 hours.

is there a difference in the speed of the crank?

is there a smell of fuel?

how long do you let it crank?

how long after does it actually start?

if you put the key in and just turn it to "on" can you hear the fuel pump?

have you checked pressure in the rail before cranking it the first time? after cranking it the first time before starting it the second?

it runs / starts fine through the rest of the day, and absolutely only happens after long periods of sitting?

The starter spins smoothly. no smell of petrol. Before starting the engine detain key to On for 5 seconds, while it had not shut the pump. Spin the starter motor can be infinitely not start. At the second attempt is put immediately. What am I doing wrong?

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.

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?

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.

This detail? 96477404

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.

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?

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.

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.

Glad to hear you got it fixed up.

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