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When I get a chance, I'll have to look up J30. Too much current is a major clue. My first thought was bad fan, but it seems you've replaced it already.
 

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My gut is telling me that the AC condenser is bad and is shorting out the system. When in idle it feels like the compressor is engaging and then the car shakes a bit and can hear the fan blowing real loud like a get engine for a few seconds.
A condenser can't "short out". There's nothing electrical about it. It might be plugged which could create some fun. But a blown fuse wouldn't be one of them. "Jet mode" does suggest the A/C pressure has gone sky-high.

Having a A/C shop look at it seems like a good idea.
 

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So took it into the shop today and they said the pressure switch is needing to be replaced. It's causing the fan to go on and off instead of running consistently to keep engine cool.
That's happened to a few people. Not common, but it's happened.


He is thinking when the fan kicks on hard like that its causing the fuse to blow.
It would place maximum stress on the fuse, but it shouldn't cause the fuse to blow. You might verify it's the right sized fuse.


He also said one of the spark plug wires were loose making the car run a bit rough.
The sparkplugs can work themselves loose. Usually the clue is a "chirp" or "click" from the gasses escaping combustion. But the proof is in the fix.
 
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