Auto Repair & Diagnostics : How to Diagnose an Engine Problem


Hello my name is Tom Brintzenhofe and I’m
a Certified Master Mechanic from Reading, Pennsylvania and today I’m going to talk to
you about how to diagnose an engine problem. In today’s world with these new vehicles it
is really really hard to diagnose any kind of a misfire or engine problem without having
some high dollar equipment but I can today I’m going to show you what to look for, you
know what you might be able to find before you take it to a garage and spend a lot of
dough you don’t necessarily have to if you can find a simple easy problem. The first
thing you want to look at and this one is going to be a little difficult to see but
you want to check your spark plug wires. Make sure you don’t see them rubbing together.
Another thing you might want to check is your vacuum lines to make sure you don’t have them
loose or missing sucking air. Your wires and everything is all hooked up in here your different
fuel injectors are in here. Make sure everything is nice and hooked up and nothing is disconnected
or falling a part and having poor connections in all your injectors here. Make sure any
injectors you might see that has got wiring hard and has got wires coming out of it just
make sure they’re all nice and tight. The biggest thing is to make sure all your fluids
are nice and full and just go over your vehicle and make sure everything is in place and where
it needs to be. Sometimes you get a vacuum line that might pop off unfortunately this
vehicle doesn’t have too many of them but if you look around a lot of vehicles do operate
with various vacuum lines on them. Look and listen and you might actually be able to hear
the vacuum leaks it sounds like a little bit of a hissing noise. You can just push that
on and it solves your problem. You are better off than spending $100 in taking it to the
garage and having them hook the computer up and telling you the same thing. Just basically
look and listen and you’d be able to tell a difference if you hear a ticking noise inside
your engine compartment that you don’t normally hear you might want to look in that area but
other than that outside of having the capabilities of having a scanner that is about as far as
you can take it with these new vehicles but just a simple problem a vacuum hose or a bad
wire or something like that will wreak havoc on these new engines but just look around
before you take it into the shop and most of the times you can find a simple problem
and correct it yourself before you spend hundreds of dollars at your local shop. The other thing
you might want to make sure is that your charging system is working properly. You’ll need your
simple multi meter to check that one. You hook it up to your battery while running.
You should have at least 13 volts. Hook the positive and negative up here and start your
vehicle. You should have at least 12.5 to 12.6 on a battery that is fully charged. This
one has 12.55 which is about perfect and what you want is it has got to be at least 13.
Now if you don’t have at least 10.5 volts on this particular engine or any kind of computer
run engine from 2002 and up it will not operate correctly, misfire, sluggish sometimes it
won’t even start but your biggest thing is make sure your charging system is working
that will itself run havoc on your engine. Outside of that, good luck and I hope you
can fix it.