Engine kicking on startup when it’s cold
If it is too far advanced, odds are, it’s going to need a timing chain, which can be very typical for those things. But, of course, you’d want to have the battery, the alternator, and the starter checked because if any of them are weak, it might not get enough power and kick a bit. But a lot of times it is the timing chain that is worn. So, get that checked out first. Your best bet may be to have this looked at by a professional, such as one from YourMechanic. They will be able to diagnose your car’s hard starting issue if it is starting to become a major problem.
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Engine stalling – After your engine starts, you may experience stalling while you drive. This will either occur at higher RPMs or when you take your foot off the pedal. Rough idle – Your engine may produce loud noises or even vibrations when you are idling.
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
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As a general rule, car engines do not like cold weather and do not do operate as well in cold weather. When you start your car in the morning and turn the key to on, the coolant temperature sensor immediately reads the temperature of the coolant and relays this to the computer indicating that the coolant is cold. The computer then knows at this point that it needs to enrich (add more fuel) the air/fuel mixture at startup due to the change in air density. When you start the car, you will notice that it idles high for a period of time until the engine warms up. This is the enrichment cold start process. This is done with what is called a cold start injector which injects more fuel into the motor until the engine reaches a specific operating temperature. The computer simply feeds a little extra gas through the fuel injectors to start the engine and then maintains a certain amount of fuel supply to the motor until it is warm. I would recommend having an expert from YourMechanic come to your location to take a look at your vehicle and diagnose your cold start issue.
If it is too far advanced, odds are, it’s going to need a timing chain, which can be very typical for those things. But, of course, you’d want to have the battery, the alternator, and the starter checked because if any of them are weak, it might not get enough power and kick a bit. But a lot of times it is the timing chain that is worn. So, get that checked out first. Your best bet may be to have this looked at by a professional, such as one from YourMechanic. They will be able to diagnose your car’s hard starting issue if it is starting to become a major problem.
Since this fault has lasted after the engine was replaced it could be a oil pressure sensor, wiring harness fault, ECU fault, oil pump, oil strainer clogged, or low oil pressure.
To diagnose this issue properly you need a complete vehicle inspection to start from square one and identify the root cause of all this.
It sounds like you may have a faulty coolant temperature sensor. This sensor relays the temperature of the coolant back to the ECM which uses this information to control many things such as when to turn the coolant fans on and off as well as how much to adjust the air to fuel ratio in the motor. Both of these functions are affected when this sensor is not working properly. If the senor is reading incorrectly, this may cause inaccurate temperatures to be read, thus causing inaccurate adjustments to be made to fuel and to the operation of the cooling fans (i.e. staying on too long or not coming on soon enough to help keep the motor cool). I would recommend having a professional from YourMechanic come to your location to diagnose and inspect your vehicle.