I have a 99 Grand Marquis with about 150,000 miles. Great car, the
engine has never been tuned up; doesn't appear to need it. I have had
some front end problems recently.
Anyway, I noticed that the brakes pulsate. I took of the wheels and
noticed that the brake pads are good, they are not worn. The brakes
were done at about 20,000 miles ago so I wouldn't expect them to be
worn out yet.
I do know that the rotors have never been turned. The guys who work on
my car tell me that they are disposable rotors and shouldn't be
Is the pulsating due to warped rotors? Can bad wheel bearings produce
the pulsating brakes?
Yes your car needs new rotors and turning them would only exasperate
the problem as the rotors will only become even more warped than they
Don't expect to keep your car for a long time since it's obvious you
neglected to keep up with any type of maintenance. I can totally
visualize your air filter with dirt and leaves caked onto it. I can
see your spark plugs all old and decayed with barely any life left into
it. I'm sure your PCV valve is fouled up causing your engine to burst
it's oil seals. I can also picture your fuel filter clogged with all
sorts of nasties starving your engine of fuel and wearing out your fuel
That is right! Expect your Crown Victoria/Grand Marquis to be dead and
short lived. It's days are numbered thanks to it's negligent owner.
Thank you for posting *its* address. Only I thought the nasty trashy
scumbag lived in Yellow Knife in Canada? I say we should go pay *it* a
visit and take a rifle to *it's* head. Effectively putting *it* out of
sorry eastward, but with the nasty tone, the yahoo address, and the fact
that he changes his address more than he changes his undershorts, I assumed
it was him. no disrespect intended with the insult, and it will not happen
yes, your pulsing in the brakes is most likely caused by warped rotors. the
reason these are considered "disposable" rotors is because the are cheap
enough to replace. cost of new rotors is almost the amount that a shop will
charge you to turn and true the old ones.
Many things can cause pulsating brakes - particularly on a poorly
maintained vehicle. Calipers are mounted in such a way that they can
move - and if reasonably well serviced, a simple warped rotor does not
necessarily have to cause a pulsation. Couplesd with seized sliders,
More common than simple warpage, particularly on vented rotors, and
fords, is the rotors collapsing between the fins, so you get wavey
More common yet is "pitted" or eroded rotors, where great slabs of
iron dissapear from the faces of the rotors, or huge hunks of scale
make the rotors thicker in several areas.
In all 3 cases, best to replace the rotor. Machining can remedy a
simple warpage - but a thinner rotor has more trouble handling heat,
and is more likely to warp again. It will not be successful on "wavey"
or pitted rotrs, because the waveyness is due to a mechanical defect
thet will just get worse - coming back again, and pitting is generally
to deep to clean up without having the same effect as with warped
rotors. Replacement rotors for the Ford are cheap - even if you pay a
little more than for the "budget" rotors and buy quality.
Bad wheel bearings will cause all kinds of other nasty symptoms (like
noises) before you would get brake pulsation.
Okay, here is the real deal. I have been looking at this ng for months
and always felt reluctant to post anything because there are way too
many trolls like this dick head HURC.
Anyway, contrary to what you may believe, my 99 Grand Marquis is well
maintained, although I admitt a I haven't changed spark plugs. I have
replaced filters etc, but no plugs. The car gets 26 mpg highway, which
is higher than my brother's 2003 Ford Escape with a smaller engine, go
figure. Spark plugs appear to be a bitch to replace. Looks like you
gotta remove the fuel rail or whatever the hell you call it?
Anyway, I look for advice in this ng and I thank you all for your
comments regarding brake rotors. I will get them replaced and
eventually I will replace the plugs. Again, they look difficult so i
won't do them myself.
I do change my oil with synthetic and I do it myself.
I still think it's amazing that an engine can run geat after 150k
miles with no tune up. When I was a kid, I was changing spark plugs
every 20,000 miles and they really need it.
On Fri, 13 May 2005 21:32:53 -0400, firstname.lastname@example.org
In my book a "Tune up" is defined as: Replacing the rotor, distributer
cap and points. Reseting the timing. Replacing the spark plugs and
wires. Replacing the filters. Flushing the transmission (if
automatic). Cleaning out the carburetor via disasembling the
reasembling. Oil flush & radiator flush. Replacing various belts and
See what I mean? Most of the above can really be done on a modern
automobile anymore. New cars are equipped with fuel injection, and
electronic ignition with no moving parts. Most new cars have 1
serpentine belt and hopefully a timing chain so it's easier to keep an
eye on it plus it lasts a heck of a lot longer thanks to space age
rubbers and so forth.
That is why when you said you never tuned up the engine, it was assumed
that you never replaced the filters or changed any of the fluids.
Sorry for the mis- understanding. I really meant that I never changed
the spark plugs. I'm not sure how long they are expected to last.
I do remember those days when I did all of what you mentioned like
replacing caps and rotors etc. Sure was a lot easier then but I don't
miss doing that stuff. I do my own oil changes because I want to make
sure that if I'm paying for synthetic, I'm getting synthetic.
On 14 May 2005 07:17:21 -0700, email@example.com wrote:
Spark plugs last a lot longer today, mostly because of unleaded fuel,
which is much less corrosive to the plugs. Leaded fuel has phosphorous
in it to keap the lead from sticking to everything - and forms
Phosphorus Acid when burned.
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