Technical Engine difficult to start at cold

[Roberto Blanco]

Hello everyone. I`m new here so be gently (just kidding)

I own a `95 Tempra SX from 2 years ago and i didnt had any troubles with it until recently when encountered difficulties to start my engine in the morning. It takes 5 to 10 seconds to start it ..sometimes i need to give 3-4 tries to start it. After this i can start it without a problem(tested). After the engine becomes hot, if i leave it for 30 min i encounter the same problem even if outside are 25 degrees and engine coolant still has 60-70 degrees. I dont want winter to catch me like this because i will need a store of batteries and a new starter to pass the winter. I dont know if the fuel system has a one way valve to prevent gasoline going back in the tank, but in the car`s manual it says that if you need to work on the fuel system you need to take out the fuel pump relay so that the gasoline from the system will go back in the tank which means that there is no one way valve. Only valve which i know is there is the electro-mechanic one which cuts off the fuel if the car is stolen, or crashed.


Well i hope someone can help me or give me some ideas.

I thank you in advance !

 

[stiloff]

this may be the sensor Intake air
if if there is a Tempra SX
oxygen sensor also affects the motor start

 

[Roberto Blanco]

this may be the sensor Intake air
if if there is a Tempra SX
oxygen sensor also affects the motor start

Well, 3 weeks ago my timing belt broke and had to do a valve job for the exhaust valves and now it starting well again. Thanks for the tips though, its good to know. Cheers !

 

[Roberto Blanco]

Well, problem back again and worse. Now its difficult to start anytime, cold, hot doesnt matter. It starts well only if i stop the engine then start it again in not more than 1-2 min, if i stay longer than that it starts very hard. Other than that its wroking great. Changed the filters, oil, spark plugs, spark plug wires, adjusted the vavle clearances ...still same crap. My Tempra is SX and has 140.000 KM.

 

[Xodomingois]

Spray some gas into tbi e ask someone to start the car. If it starts (or 'almost'), you've got a 'fuel supply related' trouble. Probably a fuel pump running out of pressure or obstructed fuel line.

 

[Roberto Blanco]

Problem sovled. Was from the fuel pump. After switching off the engine the fuel was getting back in the tank. The one way valve from the fuel pump is not working anymore. Changed the pump and solved the problem. Thanks for your reply. Take care !

 

[Xodomingois]

Glad for helping, pal! hit thumbs up icon for register. Greetings from Brazilian Tempra Club!