Why won't my 2004 Titan start?

One possible reason for this could be a faulty engine coolant temperature (ECT) sensor. The ECT sensor tells the engine control module (ECM) the temperature of the engine coolant, which is used to adjust the air/fuel mixture for starting. If the ECT sensor is faulty, it may be sending incorrect temperature readings to the ECM, causing the engine to not start in cold weather.

Another possibility could be a weak fuel pump check valve. When the fuel pump check valve fails, it can cause the fuel pressure to drop when the engine is turned off, which can cause hard starting in cold weather .

It's also possible that the battery is weak and not providing enough power to start the engine in cold weather. Cold temperatures can reduce the battery's cranking power, which can make it difficult to start the engine.

I would recommend taking your vehicle to a certified mechanic to diagnose the issue.

I had a problem with my car not wanting to start in the cold. It was then I learned about CCA (cold cranking amps). I lived out west and had never heard of cca. You said your amperage is correct so this is prob not your solution. I purchased a battery with high CCA and my car starts every time now. Last week it was below zero and it dragged a bit when I first tried to start it but then started. The higher your CCA the better. Cost a little bit more but so worth it.

SOUND LIKE FUEL PUMP FAILURE FUEL FILTER LOCATED ON THE FUEL PUMP ASSEMBLY REPLACE THE SOCK FILTER IT COULD BE PLUGGED IF FUEL FILTER OKAY OR CANT BE REPLACED YOU HAVE TO REPLACE WHOLE FUEL PUMP ASSEMBLY WITH FUEL FILTER TO REMOVE FUEL PUMP YOU NEED TO REMOVE SECOND ROW LEFT HAND SEAT, REMOVE THIRD ROW SEAT,REMOVE SECOND AND THIRD ROW SEAT BELT BUCKLES MOUNTED TO THE FLOOR,REMOVE LEFT HAND CENTER PILLAR,REMOVE LEFT HAND REAR TRIM PANEL, REMOVE LEFT HAND REAR SIDE DOOR KICK PLATE AND WEATHER STRIPPING, REMOVE SECOND ROW REAR CENTER CONSOLE AND BASE IF EQUIPPED, REMOVE THE INSPECTION HOLE COVER UNDER CARPET BY TURNING RETAINER 90 DEGREES REMOVE ELECTRICAL CONNECTORS, REMOVE EVAP HOSE.REMOVE SUPPLY HOSE, REMOVE LOCK RING USING SPECIAL TOOL J - 46214, REMOVE FUEL LEVEL SENSOR, REMOVE FUEL FILTER AND THE FUEL PUMP ASSEMBLY.BESURE DEPRESSURIZE FUEL SYSTEM BEFORE DISCONNECTING ANY FUEL LINES AT THR FUEL TANK.

the car won`t start in cold weather even when plugged in alternator was changed 4 months ago just changed battery thinking it was the battery but seems like something is draining the battery overnight? Maybe its a bad connection??Plz help!!!

There are several things that few people know about starting cars in cold weather. 1. Check your battery to make sure it is not rusted, leaking, and has a charge 2. Jump start your battery with another car, even if you believe the battery is good, this often times will still start your car. 3. If your engine is cold, and you have an older car, ensure to get your fuel lines to the engine flushed or have fuel injection service performed 4. The engine tends to warp the same way wood does during the extreme cold, do not be afraid to continue trying to warm up the engine by constant cranks with it is cold out. Your not going to hurt the car, the worse that could happen is too much fuel will enter the carborator and cause flooding in the system to occur. Wait 20 minutes if this happens and start to crank again 5. Bad spark plugs are a major reason why many cars take a very long time to start 6. Please have your spark plugs removed and exchanged for new ones. Over time, spark plugs become fowled and prevent the car from starting even thou you hear cranking!!!

Well first of all, who ever gave you the idea of using ether to start your Titan should be strung up to the rafters and shot with frozen paint balls. Using ether to try to start this vehicle can lead to the heads separating from the block. Do not tell the dealer that you did this!!!

Is the fuel pressure ok? Do you still have spark? Its possible that a cam position sensor is not responding/relaying a signal.

Have replaced your glow plugs?They dont cost alot to replace,try this

bad ecm relay replace relay or swap relays in the ipdm

Primary fuel pump requires replacement. Your secondary fuel pump is used only for starting and WOT situations. This is why your vehicle will start, run, and die.

If your gas lines were froze then there is obviously water in your fuel system which even once thawed could prevent your car from starting and may not run good if it does. With that being said it obviously has to be cold for your gas lines to freeze and cold weather is ******* your battery especially if it sits for a while. Turn on your headlights and see if they are working good as well as your dome light and radio. If they are not working good or at all charge the battery with a battery charger, even though you have tried to jump it. Your car will have a fairly small battery and the smaller the cold cranking amps your battery is rated for the worse it will be in cold weather, possibly even not turning your engine over. If you do all this and it does not work it may be your starter but my money is on the battery.