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engine idle fluctuates Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Car Troubleshooting romy_bakal New User Feb 12, 2013, 5:16 PM Post #1 of 3 (2448 views) engine idle fluctuates Sign In To whom it may concern, Year of vehicle : 1990 Make of Vehicle : Toyota Model of vehicle : Pick-up (manual transmission) Engine size : 4 cylinder (does not know the size of the engine) Mileage : 163812 miles Problem : Once the engine is warm and you step on the brakes, the engine's idle fluctuates, but if you release the brakes the idle becomes normal again. When doing the check-up, I noticed that the fluctuation is gone every time I clipped (with pliers) the hose coming from pcv valve ( even if someone still step on the brake ). Pcv valve was replaced just last six months ago. This problem does not occur if the engine is still not warm. Thanks, Romy_bakal Hammer Time Ultimate Carjunky / Moderator Feb 12, 2013, 5:26 PM Post #2 of 3 (2430 views) Re: engine idle fluctuates Sign In Sounds like you have a major vacuum leak somewhere that you need to find. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional. Discretesignals Ultimate Carjunky / Moderator Feb 12, 2013, 6:48 PM Post #3 of 3 (2402 views) Re: engine idle fluctuates Sign In Hear any hissing noises inside the cab where the booster rod comes through the firewall when you press on the brake pedal? Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.   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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