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1997 Isuzu Rodeo Question runs lean on one side

Tiny
ALBERT TALLEY
  • MEMBER
  • 1997 ISUZU RODEO
Engine Performance problem
1997 Isuzu Rodeo Question 6 cyl Two Wheel Drive Manual 150K miles

Once the engine warms up it runs lean on one side. It has burned up two catalytic converters. Any ideas
Saturday, January 9th, 2010 AT 10:26 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
More air than fuel:

* 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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Sunday, January 10th, 2010 AT 12:55 AM

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