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San Antonio, TX
Gas powered excursions have had idle air control valve problems in the past that I used to check real quick by tapping on it when it was idling low and it would pick up instantly.but parking lights should not have anything to do with this,have you had it scanned? This should be the first step.
just the positive and negative cables,and if you have aftermarket accessories or power wires with eye terminals will go on positive terminal.
this definition sounds like po171,po174 bank 1 and 2 lean. meaning that the control module is adding fuel to compensate for a vacuum leak. check all hoses and vacuum tubes around upper intake.
faulty temp blend door actuator,also could have broken door itself.
a blown fuse will be a short to ground on one of the ECM powered circuits,a thorough inspection of the harness for pinched/chafed wires is in order if this doesn't work put a fresh fuse in and do a wiggle test until you narrow down what section of the harness makes the fuse blow.
factory setting that is non adjustable is 10 degrees btdc,but I think you might be talking about timing belt instructions and base timing?
first thing that comes to mind is a faulty door ajar switch or circuit issue.
What is the dtc that is present? there are codes that can be set and will not turn on your check engine light. This is a key piece of info
I would hook up a scan tool and see if communication can be established with the cluster,then check for power and grounds at cluster with schematic in hand.
catalyst efficiency below threshold,look for physical damage on the bottom of the converters. Physical damage,excessive misfire events,stuck open injectors will cause catalytic converters to go bad. If you get the code for catalyst efficiency below threshold it's pretty much a done deal for the converters,you just have to make sure you know and correct the root cause.