is it worth it to use copper gasket spray?   opinions? advice on using it? can it be used for the turbo to exhaust turbine gasket?

I'm wondering what the symptoms of a bad TPS are. Ever since the car has been running I've had an issue that feels like a misfire or a fuel cut and I'm having a difficult time trying to diagnose it. Sometimes it will rev up and make boost and then sputter out, sometimes it won't make boost at all and cuts out around 3k rpm no matter what I do.   I've already serviced the distributor and replaced the vacuum advance unit, replaced the coil, replaced the injector clips and had the injectors flow te

kind of cool looking.   http://www.ebay.com/itm/BLACK-7X6-LED-PROJECTOR-GLASS-DIAMOND-CUT-HEADLIGHTS-LAMPS-w-H4-BULBS-LEFT-RIGHT-/380897812216?pt=Motors_Car_Truck_Parts_Accessories&fits=Model%3AStarion&hash=item58af475ef8&vxp=mtr   http://i.ebayimg.com/00/s/NzgwWDc4MA==/z/5agAAOxywh1TDBYg/$_12.JPG

Ok, my headlights didnt work the other day. I checked the interior fuses, and the one for the horn was bad (Fuse No. 9). I replaced that fuse, and BAM the headlights work. What would the horn fuse have anything to do with the headlights? What was Mitsubishi thinking?