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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   1989 toyota pickup 3.0 crank no start I have a 1989 toyota pickup 3.0 crank no...   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...

mysterious sudden low gas mileage 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 themistermillion New User Oct 28, 2009, 4:34 PM Post #1 of 3 (3780 views) mysterious sudden low gas mileage Sign In i drive a 1992 nissan sentra. the gas gauge has broken so i use the odometer to know when i need to fill up. i have a ten gallon tank and usually get 300 miles before im bottom empty. but lately i have been getting only 170-180 miles. my oil has been a little low, could this be an oil problem? i checked the odometer and it still works. what could make my gas mileage drop almost fifty percent without any sign? there arent any weird noises or any other type of problem, so.... Loren Champlain Sr Veteran / Moderator Oct 28, 2009, 4:52 PM Post #2 of 3 (3776 views) Re: mysterious sudden low gas mileage Sign In mrmillion; There are a million things that can cause poor fuel economy. Well, maybe not a million? Tire pressures, air filter, type of driving, ect. Being a Nissan, I'd take a look at the coolant temp sensor. Nissan has a problem with the sensors and connectors. You'll need to have the computer scanned and codes retrieved for us to give you any specific information. With a scanner, you can 'see' what the computer is 'seeing'. Leaking injector(s), any number of sensors, thermostat, primary or secondary ignition faults, ect., ect., ect.... Loren SW Washington Sidom Veteran / Moderator Oct 28, 2009, 9:16 PM Post #3 of 3 (3771 views) Re: mysterious sudden low gas mileage Sign In Loren has a lot of great suggestions, as usual. With a 50% loss in fuel economy with no noticeable running problems I would start with the basics, look for a fuel leak and depending on where you live, maybe install a locking gas cap..........   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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