2005 neon - after car left at airport, won't idle until it warms up
When I drop my car off at the airport and pick it up a few days later, sometimes it won't idle after it starts, so I have to use the throttle to keep it going at stoplights for a little while. Last week this happened without leaving it at the airport, but its fine now. It is very intermittent but definitely worse when it is left for a few days.
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Had the exact same problem with my 2005 Dodge Neon. One place told me it was the alternator, and replaced it, only to have it happen again 3 days later. Dealership couldn't figure it out at first until it happened again (right after I picked it up from them and got about half way home.) Turns out it was a bad battery cable.
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.
TRY SPRAYING SOME CARB AND CHOKE CLEANER INSIDE THE THROTTLE BODY WHILE WIPING IT WITH A CLOTH RAG. PAPER TOWEL WILL NOT BE STRONG ENOUGH. IF THIS DOESN'T SOLVE THIS THEN CHANGE THE IDLE SPEED SENSOR. HOPE THIS HELPS. BEST OF LUCK. THANKS FOR AN HONEST RATING AND FOR USING FIX-YA. PLEASE KEEP ME POSTED.