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freak!

Couldn't hurt too retighten your cylinder head and exhaust nuts.  Crack them loose first, then tighten them to spec.  It is possible that they may of come loose in the first 300 miles, thus causing a loss in compression.

You may even want to tighten them another 5lbs (loosen them first), your bolts may of stretched a little over time.  The idea here is to have the cylinder head perfectly even, with the same amount of pressure on each nut.

just my two cents!

newf
 

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I believe the red light is supposed to blink when you pull it over.  Better have someone else with knowledge on the 580 EFI answer this one.

I bet if you dumped some gasline antifreeze in with your fuel, your problems will go away.  Couldn't hurt to throw some injector cleaner in too.  Not too much, you don't want to create a lean mixture.

Check your plugs for a proper burn.  You want to see a nice brown color, I know that some efi cats burn really rich (plugs will be black).  Not a real big problem, and is probably better on the motor, just that you are loosing some power.  Not much you can do about it, short of replacing the chip but then you will need to get in to pipes and reclutching.  If the plugs are white, something is really wrong.

newf
 
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