.fb-login-button.fb_iframe_widget.fb_hide_iframes span {display:none;}
  • Register

Get upfront auto repair quotes from reputable shops in your area | itimaster.ru Local
Need Auto Repairs?
Get a Free Quote
Get upfront auto repair quotes from reputable shops in your area.
itimaster.ru Marketplace

37,852 questions

24,930 answers


25,559 users

Top Users

Reynaldo 10,835 Points
Carguy1 7,330 Points
G37driver 3,517 Points
OBDIITech 2,932 Points
OBDtech2 165 Points
corvette-78 127 Points
knowledge 1488 124 Points
Lemuel Alfaro 121 Points
Samat Bekov 117 Points
ptl 113 Points

P0171 1998 chevy lumina ltz 3800

I have a PO171 lean mixture, bank 1 code.
I have had MAF sensor replaced twice. Check engine will come on and sometimes shut off. Mostly on. Under hard acceleration, engine pulls strong (235,500 miles) but near redline there is a slight hesitation. Almost like engine not getting enough fuel. IDK for sure. I take excellent care of car and engine. Synthetic oil. Intake gasket replaced, as common problem with 3800's. I use 89octane, sometimes 93. Problem seems slightly better with 93. I'm guessing low fuel pressure or vacuum leak.
Vehicle: 1998 Chevy Lumina LTZ 3800 Series II
asked Jan 24, 2016 by PO171, bank 1, lean

1 Answer

Vacuum leak is more common when you have a lean fuel trim, If the CK ENG LT comes on during hard acceleration, have a exhaust back pressure check, Using synthetic oil with this year make and model will do more harm to catalytic convertor.
answered Jan 25, 2016 by Reynaldo (10,835 points)

Related questions

1 answer
258 views asked Mar 26, 2015 by Robert
1 answer
149 views asked Jun 26, 2017 by Tim
1 answer
75 views asked Apr 21, 2015 by anonymous
1 answer
112 views asked Jan 8, 2015 by Robin
1 answer
69 views asked Jun 28, 2015 by anonymous
Home - Home - For Shop Owners - About itimaster.ru - Privacy Policy - Terms and Conditions - - Copyright 2010-2018 itimaster.ru

itimaster.ru - - -

Related pages

position of camshaft sensorp0401 ford f1502003 crv value2004 dodge durango hemi engine problemsalternator ford focus 2002obd2 laptop interfacehyundai sonata exhausthonda civic codessymptoms of a bad crankshaft position sensorarea code 01172001 infiniti q45 problemslincoln ls fuel pumpobd ii code p0174injector control pressure sensormaxima air pumpcummins engine codes08 acura tl type s2005 nissan xterra radiator recallintrepid what does it mean2007 equinox problemsp0303 ford f1502007 nissan altima transmission fluidelgrand shopknock sensor xterracottman transmission raleigh ncp0440 vw2004 bmw 530i transmission problemsp0171 engine codeheated oxygen sensor bank 197 bmw 528i partshonda element check engine light2006 scion xa transmission fluid changepo411 codemodified toyota camry 2007toyota obd codeswhat does code po420 mean1998 nissan sentra enginevw brake switchpo463 codetundra check engine light resetdtc volvorcm code2007 tahoe throttle bodycheck hybrid system priuscommon problems with dodge chargerswhat causes a random misfire1995 toyota camry transmission problems1998 vw beetle transmission problemsford f150 1998p0171 kiacatalytic converter cleaner advance autop0175 system too rich bank 22002 ford ranger thermostatwhat are the symptoms of a bad shift solenoid2005 chevy trailblazer headlight problemsnissan pathfinder tire pressure2000 mercedes s550vtec variable valve timing2010 nissan maxima battery problems99 acura tl transmission fluidthrottle body 2010 ford fusion2004 saturn vue redline problemshyundai elantra touring 2011 problemsp0300 chevrolet silverado1998 buick lesabre problemsnissan murano acceleration problemsp0300 mazda2007 nissan sentra starter2002 vw jetta transmission solenoid2003 bmw 745i transmission problems2004 nissan maximum09 nissan rogue recallscode po402p0171 system too lean bank 12005 saturn vue transmission recallobd11 codes list