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Have the temperature sending sensor tested. When first starting a cold engine, that is not at operating temperature, when you first turn the switch on to get ready to crank the engine over, automatically the working temperature sensor will send a message telling the computer to place the engine into "cold start mode". If the temp sensor is malfunctioning/broken it won't send this message and the engine is hard to start. Yet, if you feather the throttle a bit for long enough to get the engine warm, it will keep running on it's own. No fun in the wait.
Think about how the vehicle is acting. Starts fine when cold, hard to start when warm. In these computer operated systems, the computer runs everything. Starts fine when cold: the computer has the engine in cold start mode putting more fuel in till it warms up. Temperature sending unit in the manifold sends a message to the computer telling it to stop the cold start mode and it stops dumping excess fuel into the cylinders and it runs fine. IF, mind you, IF the temperature sending unit is faulty, it's not telling the computer to stop the cold start mode and is flooding the engine with fuel cause it's sill in cold start mode. This is my take away on your situation and the temp sending unit is something to check to be sure it's functional. Check it out. I hope this WAS the answer to your problem my friend. It's typical. Luck to'ya Bro.
When a temp sensor goes bad, it usually fails to a setting that makes the ECM think the coolant temperature is about -40 degrees F. This makes the ECM send MASSIVE amounts of fuel to the injector(s) in what it thinks is an extremely cold start. This causes the engine to flood and makes for a hard start. You may be able to get the car started if you do a "Clear Flood" procedure, which is to hold the gas pedal to the floor while cranking until the car starts. Even then, though, the car will run so rich that you may have to keep revving the engine to keep it from stalling out at idle. On the road, it may seem better, but your fuel mileage will be awful.
change the thermostat, sounds like it could stuck open and wont allow the engine reach operating temp, also test the constant control relay module located to the right of the battery as your facing the front of the car, also test coolant temp switch it might be defective and producing a high voltage that would cause the fans to constantly operate no matter the temp. Hope this helps
Hi Bruce Take the vehicle for a scan and I'm fairly sure the fault will be recorded as a defective temperature sensor. Once that is replaced I think the problem will be solved. What happens is the sensor signals the injection system to allow more fuel for starting when cold and at the moment it can't know if the engine is hot or cold, so it injects for an engine at operating temp. (When cold the engine needs more fuel to be able to start) Regards Johngee10
I'm assuming the engine cranks with the starter but does not start and run.
check the operation of the cold start injector. This is a separate fuel injector that injects fuel into the intake manifold to help richen up the mixture for cold starts. It operates on a timer that is linked to a sensor that measures engine coolant temperature. Once warm or the timer runs out, the cold start injector is turned off. Other things to check:
Fuel pressure too high (floods engine through cold start injector), engine coolant temp sensor or intake air temp sensor is stuck at full hot (doesn't allow enough fuel for cold starts), fuel injectors are leaking (floods engine with fuel).
Your vehicle uses the coolant temp sensor and the intake air temp sensor to determine the engines temperature on a cold start. If one of them is dramatically different than the other it will flag a code.
Is the check engine light on?
When was the last time you had a tune-up? if recently what brand of plugs where used?
Have you noticed any hard start issues after a hot soak? A hot soak would be driving the car until fully warmed up, shutting of the engine for approximately 15 to 20 minutes, and then starting the engine again.
Sounds like the electronic module needs to be replaced. Unplug the old one take out the mounting screws get a new one at the auto parts place plug it in replace the mounting screws and it should be ready to go it's not hard
Look for the temp sensor around the area where the top coolant hose meets the engine. That should be your thermostat housing (goose neck)....the coolant temp sensor is typically located in or around that component. What octane gas are you using? You may find that operating in the colder temp will require you to run premium in order to avoid excessive starts.
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