2013 Chevy Aveo Wont Start When Hot

[LEVY]

Hello.

Helping a friend. 2013 Aveo fires and work fine until turned off.

It will crank but not turn on when hot.

I'm traveling, so if you know of any part/sensor that could cause that problem, please let me know. Replaced CPS, no help.

Again, it will start and run fine if started with a cold engine it can run fine all day long, until turned off.

[EAD15]

Sounds like vapor lock to me.

[avguy]

Try spraying a very small amount of sensor-safe starter fluid into the intake to see if it will fire on that.

[LEVY]

Thank you guys. Will try.

I was thinking maybe a sensor.

[WyrTwister]

Trouble is , there are LOTS of sensors .

God bless
Wyr

[LEVY]

Yes, many sensors but not that many that may cause that problem.

Thank you anyway.

[WyrTwister]

Try spraying a very small amount of sensor-safe starter fluid into the intake to see if it will fire on that.

That will tell you if you are getting spark . Or you can use something like this to test spark .

http://www.harborfreight.com/inline-...ker-69014.html

Taking a stab in the dark , I would guess something in the ignition system getting problematic when it gets hot ? Coil pack ?

I suppose you might have a heat related problem with a crankshaft or camshaft position sensor ?

Does the fuel system have a Schrader valve , so you can easily connect a fuel pressure gauge ? Would be helpful to know what the fuel pressure is cold , then hot .

My understanding is , just about all the vehicle with electronic fuel injection have the pump in the tank . Pushing the fuel .

I think of vapor lock more with older vehicles with carburetors and mechanical fuel pumps on the engine ?

God bless
Wyr

[exodus0784]

Sounds like an electrical issue. Stuff gets hot, expands, stuff isn't contacting correctly anymore. You mentioned replacing the "CPS", I'm assuming this is *crank* position sensor, and not cam position sensor. I would start looking there, first.

[LEVY]

Thank you, will check the Cam Position Sensor.

[exodus0784]

A bad/disconnected cam position sensor won't cause a no-start situation, just a CEL. Check the crank position sensor. Another possibility is the "main relay". Some Hondas have issues with cars not restarting after getting hot because there's a fault in the main relay. I haven't heard of that on an aveo, yet...

Definitely check to make sure the car is getting spark and fuel, before you start replacing sensors, though. I could be a loose connection to the ignition coil, as well.