Question about 1999 Ford Explorer
Detecting rich or lean air fuel ratio what could it be
Try spray cleaning your air mass sensor. be careful and use very little spray. you can damage the air mass sensor with too much spray. the air mass senser tells the computer if your air filter needs to be replaced. it is located between the air filter and the air throttle body.
Posted on Dec 04, 2012
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Posted on Jan 02, 2017
It is located at the back of the engine near the fire wall. It is gray with a T connector at the top with two hoses coming off of the T and going forward into the intake manifold.
Posted on Mar 07, 2009
this is not a job for the faint of heart!! you have to remove the complete dash! the heater box is located hehind the radio !in the middle of the dash ! theres no way around!!!
Posted on Mar 20, 2010
Check for vacuum leaks. this is the main cause for lean codes. Definitely not the coolant sensor. Let me know there are other things also.
Posted on Feb 14, 2011
You will need a book for that...and good luck at finding what you need, the Chilton Books, and others have cut their info. back to maintenance only...for the most part. go to AutoZone, They have a good system, and if you find a friendly Parts Person, they might be able to help you...or you can take it to a known, good, Mechanic...
Posted on Jul 30, 2012
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Fuel Trim Bank Two Condition
- The ECM has detected a rich or lean air/fuel ratio condition on engine bank two
Fuel trim bank one condition
- The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.
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