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Automotive Repair Car Troubleshooting Topics   Car Troubleshooting   Engine Troubleshooting   Engine Fault Codes   Electrical and Wiring   Transmission Problems Car Repair Topics   Car Making Noises   Car Stereo Repair   Heating or AC Issues   Motorcycles and ATVs   Tricks of the Trade   Truck Repair Advice Site Options:      Login   Sign up here! Latest Forum Post   2011 Dodge Nitro OBD scanner seems to drain battery in 10-20 minutes When I bought this car in summer 2023, a... Grounding Cable, 2017 Jeep Renegade Trailhawk The Cable that connects my negative batt... Rough Idle (Found new thing) Hi everyone. First of all sorry for bad ...     equipment hey yall. im a first year engineering st...   HELP I have a 1956 1/2 ton panel truck, 69 35...   Howdy     Just wanted to s...   ABS/Tractiob/Brake Lights on But No DTCs Hello all, Recently while driving m...   Chevy strut replacement I'm trying to get a sensor of some kind ...   2020 suburban new transmission and issues after install recently had the transmission fail at 11...   Caliper piston post cleaning won't screw in Hello, 2013 Hyundai Elantra limited (ma...

Search Auto Parts Search Unstable idle speed Sign up here!   Email This Post Auto Repair Home>> Automotive Repair>> Engine Troubleshooting Squarehead New User Mar 22, 2014, 11:40 AM Post #1 of 4 (1593 views) Unstable idle speed Sign In I have a Toyota Corolla 2003 and I bought it at the begining of winter. When I start it, the engine runs at 2000-3000 RPM, witch is normal at winter's temperature. Then it slows down a bit, witch is still normal. Then, after a few minutes, the engine's speed slightly raises, then go down to normal... It does that a few times when the car is idle. Is it related to a bigger problem? how can I fix this? Discretesignals Ultimate Carjunky / Moderator Mar 22, 2014, 11:54 AM Post #2 of 4 (1585 views) Re: Unstable idle speed Sign In When the engine is at full operating temperature and idling, does it do that? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. Squarehead New User Mar 23, 2014, 5:05 PM Post #3 of 4 (1524 views) Re: Unstable idle speed Sign In Yes it does, even after I made some road and with the engine warmed up. Discretesignals Ultimate Carjunky / Moderator Mar 23, 2014, 5:36 PM Post #4 of 4 (1519 views) Re: Unstable idle speed Sign In AC compressor engaging and disengaging, electrical cooling fans going on, or other electrical loads powering up may cause the idle speed to increase. ECU does this to compensate for the load put onto the engine. Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved. (This post was edited by Discretesignals on Mar 23, 2014, 5:37 PM)   Email This Post   Automotive Repair     Auto Body Repair and Refinishing     Heating or AC Issues     Electrical and Wiring     Brake Systems     Car Stereo Repair Advice     General Discussions     Car Making Funny Noises     Engine Fault Codes     Engine Troubles     Exhaust Systems     Steering and Suspension     Transmission Troubles     Tricks of the Trade Automotive World     General Discussions     Antique Car Talk     Car Shows and Events     The Bargin Bin     Motor Vehicle Inspection     Car Care Tips     Traffic Tickets     Gasoline, Motor Oils, Concept Cars and Engines     Auto Insurance, Financing, Leases, Warranties Truck Repair     General Discussions     Truck Engine Repair     Truck Suspension Repair Motorcycle Repair     General Discussions     Motorcycle Engine Repair CarJunky     Open Posting     Board FAQ's     New Board Suggestions

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