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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...

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 GrandAm Anonymous Poster alankiehle@yahoo.com Dec 30, 2005, 11:50 AM Post #1 of 3 (2291 views) Gas Mileage Sign In I recently bought a 1997 Pontiac Grand Am GT from a mechanic who had replaced the '97 engine (thru a rod) with a 2002 Grand Am 3.4 liter with 20,000 miles. Everything appears to be just fine except for the mileage - I get only about 13 MPG (city)! Since the car has new plugs and wires, I really don't know what to do other than have it tuned-up a a garage. However, since garages are very expensive and do not want to be "taken for a ride", I decided to ask for advice. Can anyone help? DanD Veteran / Moderator Dec 30, 2005, 7:11 PM Post #2 of 3 (2286 views) Re: Gas Mileage Sign In There are a lot of factors that could cause poor fuel mileage that it’s going to hard to tell you what route to go in. Yes a basic tune-up will never hurt but because this is a replacement engine from a newer vehicle, I would be concerned with sensor inputs. I’ve seen this many times when a salvaged engine goes into a vehicle; all the sensors look the same externally, plug in to the wiring harness, will not turn on a check engine light but are not the proper sensor electrically. Close only works for horseshoes and hand grenades. LOL If this were my vehicle I would have someone scan the computer, not so much for codes but for sensor inputs.(Codes are not the be all, end all, for diagnostics) That’s to make sure that all the sensors were in fact sending out “normal” signals and to make sure the computer is capable interpreting the signals properly. Don’t bother running into one of those places that’ll “scan” your computer for free and tell you what code(s) you may or may not have. Like I said you need someone that can interpret scan data; yes that’ll cost you a little money for an experienced technician to do this but hopefully with that experience he’ll/ she’ll be able to see something that doesn’t jive and cause this problem. Dan. Canadian "EH" Guest Anonymous Poster Jan 3, 2006, 8:40 AM Post #3 of 3 (2276 views) Re: Gas Mileage Sign In Dan, Thank you very much for the information. Guess I'll just have to find an experienced technician to scan the computer for sensor input codes. Again, your help is appreciated. Alan   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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