From what I'm seeing, it looks like the
majority of 2004 model engines are
coming with "drive by wire" throttle
It's actually quite irritating when
you are working on the engines
and you need to rev the engine
for whatever reason. You cannot
do it from the engine compartment.
Some guys will say, "yeah, but you
can use the scan tool to control
the throttle".....but try to "blip"
the throttle with the scan too, it
doesn't work that well.
It would have been nice if GM
had still left a mechanical linkage
out at the throttle bodies.
The throttle on the 8.1L in the 2500HDs is electronic. Talk about something
odd to get used to. Picture this, you are using cruise control at 65 MPH.
You decide to pass someone and gas it. There is NO change until you get the
pedal to the point of turning the electronic pot past the point of where it
thinks it already is. In other words, there is NO response for the first
second or two! Very weird sensation.
sounds like they should put a small motor in the throttle pedal to keep in
in sync with the throttle body, kind of like those force feedback joysticks
the hard core gamers use.
My cousin has worked as a mechanic for years. He told me that Mitsubishi
has a "sports car" where the steering is drive by wire. He said they fail
often and fail hard right when they do fail. Sounds kind of scary. Maybe
because I work with servers all day long so all the buzzwords are in my
head like redundant power supplies, redundant fans, RAID controllers, etc I
wouldn't feel comfortable with steer by wire unless there was a redundant
system in there with two pots on the steering wheel with two sets of wires
going to the redundant engine computers through two separate holes in the
firewall and then two separate wires from the engine computers to two
motors on the steering box.
It's not really "steer by wire"...it's just electrically
assisted. Steer by wire means (to me anyway) that
the driver has no direct mechanical link to the wheels.
This isn't the case in the system in Malibu.
If you are interested, here is a picture of the
steering column out of a new Malibu. It went
belly up and has to be replaced as a unit.
And for those folks that think American cars are made
in the States, notice the label on this Delphi electric
Other parts of the column are made in Mexico (as are
millions of other items that happen to be in GM vehicles)
Oh...I think there are plenty of things that I
still need to add to my collection. It's not
difficult to describe things using words, but
it certainly is easier when you have pictures.
I take my camera to work and keep it handy
in case something cool or odd happens to
come in the shop.
I might just grab my camera and run by my friends shop and snap a picture or
two of an electric cooling fan that got so hot it melted the fan blades and
the motor mounts that it all just slid to the bottom of the housing..
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