Fellow TJers, I need your help. I am seeing an issue with my TJ that i reproduce with 100% probability.
This is the problem:
1. Sit in a parking lot with engine running (in park, basically a hot idle situation), relatively hot Houston weather, after driving to the store (or whatever), engine temperature at stable at 210 at all time.
2. Shut down the engine, remove the key
3. wait for 5 or 10 minutes.
4. Then restart the engine (the temperature gauge will show slightly higher that 210), and it will behave very bad. It will crank and start, but the RPM will be very unstable (jumping down to 200/300 area), like almost shutting itself down, will shake like crazy, and after a minute or two it will stabilize and run perfectly fine. No check engine lights observed at all.
If i do not wait at all with engine shut down (dont do the step #3), (like drive to the store, sit in the car for 5 minutes, shut down the engine, remove the key, and then restart the engine in less than a minute or 30 seconds) engine starts and runs perfectly fine. Somehow, restarting it when it is very hot, after letting it cool down for 5 minutes drives it crazy.
If i start the engine from cold, there will be some ticking when engine temperature reaches 150, but they disappear very quickly after heating up to 180, and then engine runs just fine. I am not experiencing anything except this ticking (that i dont even hear if I drive, it can be heard when you start the engine and stand next to it when it heats up)
I know my lifters might be bad, and might me be leaking, so is it possible that they leaked in this 10 minutes of wait? If they are leaking, why the same leak does not impact my engine as bad when i start it cold?
If i have a problem with my cooling system (i have replaced only the radiator so far, it is brand new), then Wouldnt it be reflected on overheats or something? I have not seen any signs of overheat so far, as it is always on 210 (after heating it up), no matter how hard i am pushing it (like 70MPH with overdrive off, runs like champ). I have measured the temperatures using external thermometer, the temperature gauge works just fine, and think that thermostat as well. Also, if water pump would have any problem, i think that it will never be able to cool itself down correctly, which it actually does perfectly fine.
The engine has 104K on it, and runs pretty strong usually, except this problem.
Any words of wisdom? Anybody have seen anything like this?
This is the problem:
1. Sit in a parking lot with engine running (in park, basically a hot idle situation), relatively hot Houston weather, after driving to the store (or whatever), engine temperature at stable at 210 at all time.
2. Shut down the engine, remove the key
3. wait for 5 or 10 minutes.
4. Then restart the engine (the temperature gauge will show slightly higher that 210), and it will behave very bad. It will crank and start, but the RPM will be very unstable (jumping down to 200/300 area), like almost shutting itself down, will shake like crazy, and after a minute or two it will stabilize and run perfectly fine. No check engine lights observed at all.
If i do not wait at all with engine shut down (dont do the step #3), (like drive to the store, sit in the car for 5 minutes, shut down the engine, remove the key, and then restart the engine in less than a minute or 30 seconds) engine starts and runs perfectly fine. Somehow, restarting it when it is very hot, after letting it cool down for 5 minutes drives it crazy.
If i start the engine from cold, there will be some ticking when engine temperature reaches 150, but they disappear very quickly after heating up to 180, and then engine runs just fine. I am not experiencing anything except this ticking (that i dont even hear if I drive, it can be heard when you start the engine and stand next to it when it heats up)
I know my lifters might be bad, and might me be leaking, so is it possible that they leaked in this 10 minutes of wait? If they are leaking, why the same leak does not impact my engine as bad when i start it cold?
If i have a problem with my cooling system (i have replaced only the radiator so far, it is brand new), then Wouldnt it be reflected on overheats or something? I have not seen any signs of overheat so far, as it is always on 210 (after heating it up), no matter how hard i am pushing it (like 70MPH with overdrive off, runs like champ). I have measured the temperatures using external thermometer, the temperature gauge works just fine, and think that thermostat as well. Also, if water pump would have any problem, i think that it will never be able to cool itself down correctly, which it actually does perfectly fine.
The engine has 104K on it, and runs pretty strong usually, except this problem.
Any words of wisdom? Anybody have seen anything like this?
