I only have sound on one side of my Miles Davis Tribute earphones. How can I fix this?

SOUNDS LIKE YOUR A/C EVAPORATOR DRAIN IS PLUGGED. WHEN YOUR DRIVING THE EVAPORATOR WILL COLLECT CONDENSATION AND THEN DRIP OUT OF THE DRAIN. THE DRAIN IS LOCATED NEAR THE FIREWALL ON THE PASSENGER SIDE OF THE VEHICLE. SOMETIMES LEAVES OR MOLD/MILDEW WILL COLLECT THERE SIMPLY SHOVING A COAT HANGER END OR SCREWDRIVER WILL UN CLOG IT AND ALLOW THE WATER TO DRAIN.

sounds like your turbo charger if one fitted

I had a similar problem with my 2001 Tribute. I changed the spark plugs and the problem went away. I had about 160K miles on the original spark plugs.

no, keep using the same oil, never use anything heavier than 10W30W no matter the miles

fix the coolin lines going to the tansmission cooler its probably loose fitting going into the radiatior cooler 16mm wrench should fix u up 5/8"is the same as 16mm.

timing belts should be checked every 20,000 miles and replaced every 50,000 but sounds like you need a new thermostat and your valves are going bad

It used to be every 3 months or 3,000 miles but some manufacturers are suggesting that 5,000 miles is ok. My view is that it does not hurt the motor having more oil changes. I continue to have them done every 3,000 miles myself even if my oil life indicator has not come on. Clean oil is very important to have a engine last for many miles. There are some full synthetic oils that can go for 5,000 or 7,000 miles beteween oil changes but cost alot more than the standard oil.

had similar problems with my tribute, 60000 kilometres.
it was the catylytic convertors failing.

sounds like a timing isue
have them do a sensor test
start the car on a hoist then tap the engine or if posable tap the timing sensor and also try shaking the wires running to the knock sensor and the tining sensor or distributor

cupping is caused by poorly acting shockabsorbers probably have leaking from the shock struts and may need replacement. sounds a bit early for wear at 50k