First....Do you keep regular maintenance up on the car? For example do you have the oil changed regularly? There are a host of things that should be done to keep fuel mileage to its best. Tire inflation to proper settings (look on the door jam drivers door. a sticker will tell you proper PSI for your cars tires) Fuel filter change , air filter change, PCV valve, tune up, are all things that need to be done to keep your car running at its best. What mileage are you getting now? How many miles are on the car now?
SOURCE: 2003 hyundai elantra gls abs/tcs light on
unless you can discover what DTC (Diagnostic Trouble Code) has been recorded/set in the control module, it's anyone's guess.
Testimonial: "thankyou"
SOURCE: hyundai elantra 1.6GLS J2 torque settings
dear friend:here follows the settings in need:
cylinder head-30-35 nm + 30-35 + 65deg + 65deg.
mains-30nm +65deg
big ends- 1 - 26nm 2 - 52NM
fly-wheel -130nm
cam-sprocket - 100-120
crank-pulley - 170-180
cam caps -15nm
SOURCE: 2003 Hyundai Elantra GLS. Check engine light, code PO133
Did you use a aftermarket O2 sensor or a genuine Hyundai one? If it's an aftermarket one it may be bad or not as good as the OEM one. See here for more details and other potential causes: P0133
SOURCE: need fil for error code P2626 Hyundai Elantra GLS
P2626 O2 Sensor Pumping Current Trim Circuit/Open (Bank 1 Sensor 1)
I'll sure this has to do with a faulty O2 sensor. This sensor is usually
located around the header of your car, or down more on your exhaust.
Try disconnecting your battery for 30 mins, hook it back up, and start
your car again. This will erase the error. See if it comes in again.
Hope this help (remember rated this post).
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