engine running rich and mechanic is stumped?

1992 LEXUS SC 400

13,300 MILES

DOYLEGROFF

MEMBER
1 POST
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I have a 1992 lexus sc 400. it is running rich, can smell gas and gas gauge confirms it is using extreme amount of gas. it has had a major tune up, new catalytic converters, O2 sensors, and rebuilt ECM, and transmission flush. still same problem.

Have had two mechanics on this and hand held analysis done. still, no answers.

Save me !

Feb 29, 2012 at 8:54 PM

RASMATAZ

CAR REPAIR CONTRIBUTOR
75,992 POSTS

Could be one of the following below

1.Excessive fuel pressure can be cause by restricted fuel return line

2.Defective Oxygen Sensors.

3.Leaking injectors and fuel pressure regulator.

4.Coolant temperature sensor out of calibration.

5.Restricted air intake system.

Feb 29, 2012 at 8:56 PM

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