Does Your Car Need a Tune Up? Myth Busted


rev up your engines,
today I’m going to talk about the myth of tuning up a modern car, now when I was a
mechanic in the 60s as a kid, tuneups really meant something, you did pay to
get your car tuned up, back then cars weren’t fuel-injected, they had mechanical
carburetors in them, they get dirty and gunked-up and you had to clean them with
carburetor spray cleaner a lot and they various adjustments, you had to adjust
the electric choke, you had to adjust the idle speed, and you had to turn the screw
to adjust the air ratio, but modern cars they have sealed fuel injection systems
instead of carburetors you can’t even set the idle speed, even
that is done by computer, and back then your ignition system worked with the
distributor, they had these little points inside, they mechanically open and close,
and open and close, and open and close every time they fire a spark to a spark
plug and being mechanical, they just wear out you’d have to replace them, sometimes
as much as every fifteen thousand miles and when you were done, you’d have to
hook up a time and gun and then time the ignition to make sure it was correct, but
modern cars, they don’t use distributors they use coil on plug ignition systems,
they don’t even have spark plug wire sets, there’s nothing for you to do as
long as the system is working, now if you have a gasoline engine, of course they
still have spark plugs, but they’re so well made these days, in this case
they’re iridium plugs, have a real fine wire in there that’s made out of iridium, that
makes them last a really long time, I’ve seen some of these things with two
hundred thousand miles on them, they’ve never been changed and they’re still
running fine, a lot of the old spark plugs had copper electrodes, copper is a
lot softer and the electrical resistance and all the chemicals inside as the gas
explodes, would wear them out pretty fast but these iriduim ones, they can last a
really long time, so the idea of a tune-up in a modern car is really a
misnomer, there’s no such thing as tuning up a car like there was when I was a
young mechanic, of course you want to maintain your car, check the air filter
every once in a while to see if it’s dirty,
change the engine oil and filter a lot check the fan belt for cracks and also
check all the radiator hoses for cracks as the car gets older,
but as for tuning up an engine, that just doesn’t exist anymore, so the next time
somebody tells you your car needs a tune-up, ask them what they’re going to
do while they’re tuning it up and what you’re actually paying for, more quick
fixes on the Scotty Kilmer channel, so if you never want to miss another one of my
new car repair videos remember to ring that Bell!