I recently had a large and sudden drop in my MPG and have tried everything I could think of to correct it. The car is a 2005 Camry SE, 4-cylinder. I used to get 35 mpg highway with cruise control on and 26 mpg city. (I hardly let the RPMs go higher than 2,000.) It has 68,101 miles on it.
Starting this August, my MPG dropped to 29 highway and 21 city then by September it dropped again to 16 mpg city (no highway driving recently). I adjusted my driving style more to include slow accelerations and coasting to red lights when no one is behind me, so I managed to get 18 mpg city now.
I have tried everything I could think of to fix it:
Tires at correct pressure
Air filters changed at 60,000 ( a while ago)
Oil changed at 68,000
Scanner shows no error codes
I have put dry gas thinking it could have been water, then tried fuel injector cleaner twice, and have switched gas stations to both Sunoco and Mobil. Still no improvement.
It is my first car and I've been trying to teach myself about it. I have the Haynes repair guide and enough tools to do the basic stuff, but without the error codes showing, I couldn't think of what was the problem. I didn't want to go replacing stuff without figuring what was wrong.
It is my first car and I've been trying to teach myself about it. I have the Haynes repair guide and enough tools to do the basic stuff, but without the error codes showing, I couldn't think of what was the problem. I didn't want to go replacing stuff without figuring what was wrong.
Buy a spray can of MAF cleaner. Don't use carb clreaner....
__________________ '07 Japanese XLE I4 (Heated Leather, VSC, Mats), Dual Exhaust, K&N Air Filter, Mudguards, Modified Front/Rear Emblems, Lip Spoiler, MTEC 4,750 K High, H9 Low and Fogs, Painted Fogs, Chrome (GS300 Wheels, Pillars, Hybrid Grille, Lower Grille, Trunk Accent, Door Handles), Wood Steering Wheel, Red Out LED Tail lights, Eyelids, 19MM Rear Sway Bar, Front Strut Bar, LED Signal-Heated-Power Folding Mirrors
Okay, cleaned the MAF sensor with MAF cleaner (both the amber temperature sensor and the thin wires inside the sensor "tube") and seafoamed the throttle body....I don't know if switching to winter tires made a negative difference but the MPG dropped again to 16 mpg.
Other than these, I did nothing else. Still just doing city driving for now. No highway.
Sudden and large drop in MPG
Linear Mode
