Question about 1989 Ford Econoline
Already changed sensors plugs and wires and vacuum leak
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Posted on Jan 02, 2017
SOURCE: 1998 FORD CONTOUR CHECK ENGINE
sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.
Posted on Aug 07, 2010
your idle air control valve may be the problem. This device controls the idle speed. It may be gummed up with deposits. this is what it the part looks like; http://www.rockauto.com/catalog/moreinfo.php?pk=382734
you can remove it and spray it with carb cleaner to loosen up the valve or replace the assembly.
A faulty EGR valve and/or PVC valve will cause similar symptoms.
Posted on Sep 10, 2010
check that there is no fuel in the vacuum hose that is going to the fuel pressure regulator, if there is fuel in the vacuum hose replace the regulator.
Posted on Mar 17, 2011
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