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Re: when my chev 2000 sub is warm hard to start
I have a really good hunch that your problem is the spark plugs. As with this when your engine gets warmer the plugs get hotter and they start to lose power when you try to start your engine. I am not positive on this but I am really certain, but with this problem there can be a number of things happening.
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The temperature sending unit tells the computer that the engine is cold when first started. After engine is warmed up, if the computer things engine is still now warm, it's still in cold start mode and dumping too much fuel into the engine and flooding it making it hard t start or no start at all. I'd have the temperature sending unit in the engine replaced to see if it's cured. It's separate from the gauge or light and they would show warmed up, but the computer is not getting the message.
it sounds like the choke isn't closing on the carburetor when the engine is cold ( more gas, less air). normally step on gas pedal once to close choke before starting. need to find someone familiar with carburetors to help as it can be technical setting it up
Your toyota technician should know what a "cold starting solenoid" is. It is the little thing that works your throttle until the motor warms up and something else takes over. I'd suggest going to another technician.
Kinda sounds like the ECM or "start mixture" control module is faulty or is getting a bad input from a sensor. For example, it man not be getting a proper temperature sense from the exhaust manifold or the intake manifold water temp sensor. So, every start seems like a cold start....
If your cold start is on a "cold" engine - fine. If your cold start is on a "warm" engine - problem. Mixture is too rich for a warm engine.
Again, could be sensor sending a bad temp signal... or the control module not responding to the signal.
A bit too complicated a problem to exactly troubleshoot via long distance... but you now have a starting point.... -Jim
This problem can be several things. When your engine is cold, your computer is in a "closed loop" and just pretty much keeps the engine running until warmed up. After reaching operation temperature, the computer starts reading all the sensors. If one sensor is not connected or is defective, you will experience performance problems. Most of the time this will turn on the check engine light, but not always. Second is the fuel pump. This too will cause erratic engine problems.