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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   Strut spring orientation and strut mount tension nut 2017 Nissan rogue awd 2.5 L Put in Monro...   Transmission stuck in part, I have tried everything So I'm working on my elderly fathers 201...   2017 dodge journey LED headlights on/off randomly Year of vehicle 2017 Make of vehicle dod...   Kia Soul starter replacement issues! Okay so my car is a 2010 Kia soul 2.0 en...   Please Help - Knock sound & engine fail Hi all, Hoping to get some insight and ...   multiple warning lights 2013 GMC Terrain 130,000 miles 4 cylinde...   03 alero no low speed blower Good day everyone, I have a 2003 Olds a...   04 Chevy 2500hd tail light issues Help!!! I have changed my combo switch...   1999 Grand Caravan Sport not starting. Hi. I'm new here. I hope someone can hel... Brake Seals Bulging 2021 Toyota Corolla LE 1.8l 65,000 mile...

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 (1314 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 (1306 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 (1298 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 (1285 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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