2000 Chevy Tahoe Running Lean

TURNERS214

MEMBER
2000 CHEVROLET TAHOE
V8
4WD
AUTOMATIC
185,000 MILES

I received to engine codes that stated that the vehicle was running lean. I was told if the vehicle starts without problems that I have an issue with the intake gasket. Since then the vehicle has been leaking fluids in the driveway. (Oil?) My question is what is the average cost of repairs for the intake gasket on this type of vehicle

Friday, December 12th, 2008 AT 6:41 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Don't be too fast about replacing the intake gasket there's others that can cause it to run lean-

A lean fuel condition can be caused by:

* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (Use a fuel pressure gauge to check fuel pressure at idle)

* Dirty fuel injectors. (Try cleaning the injectors)

* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Use a vacuum gauge to check for low intake vacuum)

* Leaky EGR valve. (Check operation of EGR valve)

* Leaky PCV Valve or hose. (Check valve and hose connections)

* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)

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Friday, December 12th, 2008 AT 6:52 PM