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  #1  
Old 01-01-2010, 06:53 PM
bigmacnro bigmacnro is offline
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Angry p0402 err lean bank1 2

i've changed 02 sensor upper per advanced auto. changed dfpe sensor. am i going for the egr valve.. i did suck test, it did stumble the idle pretty good. any ideas
thanks
2001 4.0 ranger


I forgot to mention>cleaned throttle body(it was somewhat clogged) cleaned the ports from egr..check engine comes on after 20 miles or so

Last edited by bigmacnro; 01-01-2010 at 06:59 PM.
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Old 01-01-2010, 08:28 PM
STL STL is offline
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Yeah you have a clog somewhere in the EGR system
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Old 01-08-2010, 04:21 PM
bigmacnro bigmacnro is offline
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Default egr clog or leak

is there any quick or cheap way to find a vacuum leak..check engine is drivin me crazy!!!! truck rides good after all the cleaning of throttle body egr valve etc..
i did not do pcv valve..
all help welcome..
thanks again
this site is great!!!!!!
pictures are the best tutorial.
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Old 01-08-2010, 04:32 PM
STL STL is offline
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Would need to follow all vaccum lines with a soap water mixture looking for bubbles
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Old 01-08-2010, 06:23 PM
ddixon72 ddixon72 is offline
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I have used a can of eather in the past with good results. just spray hoses and listen the idle shuld pick up and look in that area.
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Old 01-08-2010, 06:55 PM
Jp7 Jp7 is offline
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I use a stethoscope to check on a naturally aspirated engine. Before I even do that I check the live fuel trim data to see if its adding fuel on the non loaded map cells.
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