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This is normal. The ECM monitors engine temperature and increases idle when it sees the engine is cold. The ECM sets the idle back to normal when engine temperature rises.
yeah,. possible egr, but did you look at the IAC - Idle air control valve? -- controls the idle at cold engine temps by diverting the air from the manifold for heat to help warm up engine on cold start. Best regards Ck
If you bike is equipped with a carburetor, the idle stop screw is located at the top of the carb on the right side. Counterclockwise turn slows the idle speed.
If you bike is fuel injected, a dealer or shop will have to set the idle speed electronically.
Hello,
The car may be hard to start because it may need a normal tune-up. If the spark plugs are pretty used, they will slowly stop burning as much fuel because the spark slowly gets lesser and lesser. On a cold day the fuel is harder to ignite with a small amount of spark.
Normal idle when its cold means that your cars idle is probably too high. If you lower the idle, the choke on a cold day will keep the idle a little higher until the motor warms and then it will kick back off. If the idle is too high, it will run very rich, smothering itself with fuel, and causing the idle to stay low. When the car warms, its creating better spark when its warm, and with the idle being too high its running at a fast idle.
The car wont start sometimes can be the cause of a few things. If the ground is bad on the fuel pump, it wont make a good connection sometimes for when you turn the key on, the fuel pump dont pump the fuel to the engine. Another one can be that your accessory switch can be loose going to the fuel pump. I think its your ground though. Good luck! Hope this helps.
Have a nice day.
-Steve
Is the car idling faster than it has in the past when cold? The car is designed to idle a little faster than normal during warm up, to warm the engine quicker, and to keep it running. The fuel/air mix richens, (more fuel in the mix than normal), during start up conditions, and then as the engine warms, it should idle down to normal. Have you allowed it to continue its fast idle to see if it idles back down? Your post indicates that you turn it off and re-start to prompt the car to idle down. You have electronic fuel injection. The system adjusts to the prevalaint conditions to give you the perfect mix regardless of the condition it is presented with. It gathers input from a series of sensors that detect engine temp, outside temp, humidity and air pressure, to deliver the mix it needs. Often, when the mix is off, it is a result of a faulty sensor. This can be detected by running a fault code diagnostic check. You can have this performed for free at most national parts chains such as advance or auto zone. Other factors can cause an improper mix, such as dirty or clogged injectors, and/or a dirty air filter. Good Luck! I hope that you find this to be very helpful!
On the carburetor, there is an idle knob. Make sure it is not set too high. This is normal during a cold start so make sure to adjust the idle knob back at 1,100 RPM after your engine is warmed up.
Also, make sure the choke system is clean and is free. Throttle cable should have an allowance of just about .8cm.
The engine idle may also be controlled with the thermostat connected to the grill fan. it will normally idle up to about 2,000 rpm when it senses that the engine is too hot but not 4,000.00 make sure this system is working well.
that is totally normal, the car has an automatic choke that makes is rev at those RPMs when it is cold then is goes back to normal when it warms up. don't worry about it!
The high idle is caused by the choke and the high idle on the carb. It is working normal and you do won't to warm up this motor before going. When it is warm and you hit the gas it activates the choke pull off to bring the idle to normal. Your mechanic is used to fuel injection that will control the fuel/air mix according to temp. I still let my injected cars warm up so the oil can thin a little. If you jump on the highway with cold thick oil it can all wind up in the to of the motor.
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