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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   Car idles funny but doesn't throw codes 2006 Hyundai Elantra Engine size: 2.0L m...   speedometer wild deflections; sometime pump gas 1999 Gmc Savana, rwd, 5.7 (I think) v8 ...   Car stalling problem My 2013 hyundai started losing power whe...   2018 Kia soul. Knocking while accelerating. Hello, my 2018 Kia soul started making t...     2005 Buick Lesabre surging My 2005 Buick Lesabre runs good & th... Misfire on coil E I am new to this forum. I haven't figure...   Having trouble at freeway speeds It's a 2002 Nissan Sentra 1.8L Automatic...     Annoying shaking during deceleration Hi fellow enthousiasts! The car is a 20...   Shop says they want to bleed my brakes for a clutch job? I took my Toyota pickup in for a clutch ...   p119f22 ‘Deterioration of the engine oil’ - 2017 Peugeot Boxer Euro 6 2.0 Blue HDi Hey guys I’m looking for some advice. ...

decreased mpg Sign up here! Search this forum this category all forums for All words Any words Whole Phrase (search options) Auto Repair Home>> Automotive Repair>> Engine Troubleshooting BWD New User Dec 16, 2009, 7:36 AM Post #1 of 4 (1232 views) decreased mpg Sign In I have a 2004 hyundai sonata 4 cyl with 170,000. The car loses power and feels like it is either fuel starved or running way too rich. Low power at high speeds. Even when floored the rpms will not increase and power is stagnant. Pressure is good in fuel line, compression pressure is good, converter checked good. I've changed the plugs, plug wires, coil packs, cleaned fuel injectors, and changed O2 sensor. (it actually ran better for a while when I unplugged the O2 sensor). Could the problem be a clogged fuel filter or bad EGR? It does require a little more crank to start now days. Fuel mileage is lower by 25-35%. Sidom Veteran / Moderator Dec 16, 2009, 8:09 PM Post #2 of 4 (1224 views) Re: decreased mpg Sign In Is the check engine light on? How did you confirm the converter as being good? BWD New User Dec 17, 2009, 6:52 AM Post #3 of 4 (1216 views) Re: decreased mpg Sign In check engine light is not on and the mechanic checked the converter-not sure how. brager User Dec 19, 2009, 11:48 AM Post #4 of 4 (1203 views) Re: decreased mpg Sign In with that kind of mileage its a good idea to change the fuel filter:) if that dont do it i would start checking for vacuum leak   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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