yokon gas mileage

timer Asked: Nov 1st, 2013
account_balance_wallet $5

Question Description

my 2003 Yukon's gas mileage has been reduced by 25%. I smell more exhaust than usual. any suggestions?

Tutor Answer

School: Purdue University

Give this vehicle a full tune-up
1. New spark plugs
2. New Air Cleaner
3. Clean the throttle body
4. Clean the fuel injectors
5. Engine oil flush

Check the throttle positioning sensor and make sure it is within specs.
Check the mass airflow sensor.
Check ECU trouble codes for any emission related trouble codes such as bad egr valves, engine temperature sensor.

Rich exhaust odor can be caused by problems in fuel to air mixture ratio or the ignition timing is retarded or a few degrees late.

flag Report DMCA

Goes above and beyond expectations !

Brown University

1271 Tutors

California Institute of Technology

2131 Tutors

Carnegie Mellon University

982 Tutors

Columbia University

1256 Tutors

Dartmouth University

2113 Tutors

Emory University

2279 Tutors

Harvard University

599 Tutors

Massachusetts Institute of Technology

2319 Tutors

New York University

1645 Tutors

Notre Dam University

1911 Tutors

Oklahoma University

2122 Tutors

Pennsylvania State University

932 Tutors

Princeton University

1211 Tutors

Stanford University

983 Tutors

University of California

1282 Tutors

Oxford University

123 Tutors

Yale University

2325 Tutors