I am a New Thread, I just recently purchased an 96 SC400. And a few days ago most of the gas stations where out of premium gas, so I had to put the medium grade gas into my vehicle. Which after a few days of driving the car started to hesitate and miss. I have since them refuel with premium gas and have added Octane booster and still lies the problem. CAN SOME ONE PLZ HELP.

Secondly, my 12 DISC Changer is not working with no sound feeding thru the system. And then and ERR shows up on the screen. What is the problem?
HELP, PLZ HELP

 

The fuel grade isn't the problem, you just got bad gas. Run it out (or drain it) and refuel and you'll likely enjoy normal performance.

buy a new CD changer or scrap it for a new system completely.

 

Wasn't able to respond in the other thread...but...

Clean your injectors maybe, CD changer likes to break often.

I doubt anyone will miss you if you do decide to "find another source."

 

Check plugs and make sure they are the right ones NGK/Denso,checking plugs tell alot about a engine. A fresh set may help with gas mileage also and a little pep if they are old. Check air filter replace with factory one since the cheapos restrict airflow. If you are handy with electronics clean internals of CD changer and lube where needed.