just for the record

IT isn't the SWR reading he's concerned about.
The reactance reading is his concern

 

I guess it's time to turn the truck off and start pulling fuses until the noise goes away.

 

Isn't reactance a bad thing?
I always try to shoot for zero.

 

I would try to find a happy medium between swr and resonance. Maybe experiment to raise swr and decrease reactance.

 

At what frequency does x=0?
Your analyzer works different than mine and requires a learning curve. I've never used one without a knob to turn. Try to raise and lower the test frequency and watch what happens to reactance vs swr.
http://www.sayedsaad.com/fundmental/16_CAPACITIVE REACTANCE .htm
http://www.antenna-theory.com/tutorial/smith/smithchart5.php

 

I think it might be worth experimenting with a different antenna.
When this antenna dialed in, I got X=2. I left it how it was.

 

Can you post a picture of the Smith chart printed from your computer? You should be able to hook the analyzer up to your computer to transfer the data.