Question about 2005 GMC Sierra
Posted by Anonymous on
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Posted on Jan 02, 2017
Check the intake manifold gaskets for leakage. It will tend to run rougher in the morning when it is cold. Check for vacuum leaks on any hose connected to the intake plenum too.
Posted on Dec 13, 2009
SOURCE: What does it mean when
A lean bank 1 and 2 is indicating there is not enough fuel being injected to support proper combustion.
Leading causes can include but are not limited to......
1) low fuel pressure or plugged fuel filter.
2) vacuum leak causing lean condition.
3) air intake hose or crank case not sealed properly and bypassing the MAF sensor or the MAF sensor element is dirty.
4) wrong fuel or poor quality fuel used.
Hope this helps. If the Service Engine Soon light is illuminated, there will be fault codes associated the light. Get the vehicle scanned for free at your local Auto Zone or Advanced Auto and report back.
Posted on Nov 25, 2010
SOURCE: my engine light is on
This is sign of a vacuum leak (possible off of the PCV system). This causes additional air to be introduced into the engine causing the fuel mixture to lean out. With the engine running, shoot short burst of starting fluid around the vacuum lines. When the engine revs briefly, you have found (at least one of) your leaks.
Posted on Jan 07, 2011
Try changing the fuel filter and possibly vacuum leak. Engine is getting too much air or not enough fuel. One or the other.
Posted on Jul 11, 2011
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