Pole Problems 1.9

Hello friends to see if someone can help me, I made the engine to my 1.9 pole and from that moment when it is between 80 and 90 temperature it does not start, as if I did not have a battery, I changed it I made a new start but it remains the same, it remains the same, pushed it and starts in one meter, I would appreciate any help. Thank you.

Check the temperature sensor one that carries a green band that is not reading well and believes that the vehicle is cold that is not the first one that happens.

I would review the positive connectors of boot and alternator battery terminals, a lazy connection or an overweight in battery produce that same problem, you want a loose land.