Question about Chevrolet Cars & Trucks
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Posted on Jan 02, 2017
P1400 on your vehicle is described as :Differential Pressure Feedback EGR Circuit Low Input You either need a new DPFE valve, or a new EGR valve. Both can be tested for functionality before replacing them both. EGR valve is more likely I think. Cleaning it may not improve its performance, but its worth a try. Also check the vacuum lines between the DPFE and EGR system. The EGR valve and DPFE are usually close together above the exhaust manifold/downpipe. you need service instructions to test these items, suggest you go to a garage really...
Posted on May 17, 2009
SOURCE: engie code P1537 how do I fix
That indicates that intake manifold runner control is stuck open. They will be open when vehicle off but will close at certain RPM's and are usually controlled by vacuum lines (red) that run to them. You'll have 2, when on front bank & one on rear if it's 3.8L. Actuators tend to get sticky & remain open. You can try freeing them up. Here's a link to a picture that will give you an idea of what to look for. ( http://rides.webshots.com/photo/1201999780011220610BGkBnV )
Posted on Jun 10, 2009
Search for the engine model ECOTec 2.2 rather then Malibu. It is very easy to replace the plugs, they are DEEP inside the engine so you will need a 6" socket extension for the spark plug socket. Needle nose pliers were required to retrieve the socket on the first plug. Don't push down hard on the plug, just enough to engage the nut. Full screen photo sequence is available at:
Posted on Aug 09, 2009
Allow the engine to cool before removing the spark plugs. Attempting to remove spark plugs from a hot engine can cause the spark plugs to seize. This can damage the cylinder head threads. Clean the spark plug recess area before removing the spark plug. Failure to do so can result in engine damage due to dirt or foreign material entering the cylinder head, or in contamination of the cylinder head threads. Contaminated threads may prevent proper seating of the new spark plug. Use only the spark plugs specified for use in the vehicle. Do not install spark plugs that are either hotter or colder than those specified for the vehicle. Installing spark plugs of another type can severely damage the engine.
WARNING Do not coat spark plug threads with anti-seize compound. If anti-seize compound is used and spark plugs are over-torqued, damage to the cylinder head threads may result.
Posted on Oct 07, 2009
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