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Possible coolant temperature sensor. It relays info to PCM which in turn regulates fuel needed for different engine temperatures. If sensor is faulty, it may be telling PCM that engine is already warm, when it's actually cold and needs a richer fuel mixture.
Your Temperature Sensor is bad or has failed. This sensor monitors engine operating temperatures. The signals needed for the ECU to determine whether the engine is cold, warm or hot, then it will set the system to operate correctly for that temperature. Ex. When the engine is cold (first start up) it will supply the fuel system with more fuel for the air/fuel ratio for a richer mixture to start and maintain correct idle.
I would check the compression. As air compresses it heats up. A trick I've used on cold diesels is to bump the starter trying not to let the motor actually turn over, so you keep compressing the same air. Do that a few times then try starting.
a bad engine coolant temperature sensor will cause cold no start conditions.your coolant sensor main sensor during cold start condition because when engine coolant cold PCM will cause rich fuel mixture for cold start up when engine coolant and oxygen sensor warms up cause engine goo in close loop lean mixture.but coolant sensor is the main information sensor if bad it will cause many problems.
Sounds like you either need to reolace the crank sensor or the camshaft speed sensor,depending on which your engine comes with.If you tach doesn't get a signal then neither does the engine controller and it is like you are not even trying to start the car although you are in fact turning the key and cranking the engine.
The first thing is to replace the coolant temp sensor. This one provide the feedback signal to the ECM to turn on when to turn on the cold start valve or not. This sensor changes its own resistance depending on surrounding temperature. When it is bad it is giving a reading out of the look up table so ECM doesn't know what to do, hence your engine experienced this symptom.
SCAN IT CHECK COOLANT SENSOR IT WILL CAUSES STARTING PROBLEMS IF ITS NOT WORKING.DOING COOL ENGINE START UP COOLING SENSOR MONITOR COOLANT TEMPERATURE SENSOR.IT WILL ENRICHEN FUEL MIXTURE JUST FOR COLD STARTING ENGINE.IT WORK LIKE SAME PRINCIPAL LIKE A CHOKE ON CARBURETER ENGINE.WHEN ENGINE WARMS UP THE COOLANT SENSOR AND OXYGEN SENSOR WILL LEAN OUT FUEL SYSTEM .WHICH IS CLOSED LOOP.CHOKE ON CARBURETER WILL OPEN AUTOMATICALLY AS THE THERMOSTATIC METAL COIL WARMS UP.YOU NEED A RICH FUEL MIXTURE WHEN COLD STARTING ENGINE.NOW A CLOGGED AIR FILTER BAD PLUGS + WIRES CAUSE WEAK SPARK NO START UP.SO I WOULD HAVE A GARAGE OR SOME BODY WITH A SCANNER SCAN IT TO SEE WHAT THE PROBLEM IS.YOU WONT SPEND TOO MUCH MONEY GUESSING.
To start up a cold engine requires reach mixture (air-gas).In your case it seems like the choke is not working ,so cold engine cannot start.If it is an injection operated system then it must have a temperature sensor which suppose to turn the choking on when cold engine needs to get started.Either the sensor is faulty or the choke or between the two there is a faulty connection somewhere.
you are having a fuel delivery problem...and it could be caused by numerous things...such as a bad fuel pump, a bad cold sensor or warm up injector. You haven't attempted to solve any of these suspected faults...so take it to a mechanic for repair