Yes, start the engine (in park) and wiggle the ignition key all around softly to see if stalls out.
Next, try spraying carb cleaner or starting fluid on each of the intake components and wait a second to listen for an increase in engine speed with the engine running. Spray each hose connected to the intake manifold and gaskets. If an increase in engine speed or the engine runs better at idle this is an indication of a vacuum leak. Taking a few seconds in between spray will help isolate the location of a leak (if there is a leak).
You mention quad driver #4 failing.
Do you know what the number was that is associated with it (example 28) if so let me know what that number is, because it will help me to find more information that the vehicle's computer has found wrong with the engine.
Monday, December 9th, 2013 AT 8:54 PM