No knocking here, and my '01 GT has 72K with original plugs.
- Max -
======In the future, everyone will be hyperlinked for fifteen minutes.
Just Say No to 6:5 Blackjack!
Sounds like you need at least three professional opinions.... That there is
a "knock" should be worrisome.... however, different problems add different
personalities to engine noises and these cannot be accurately put into
print. Double raps, single raps, muffled raps, sharp raps... on
accelleration, decelleration, float.... top end, bottom end, front back,
left side, right side.... Sorry, John, its just not that simple...
If I drive normally and wind out the gears under normal acceleration I don't
get the knock. It's when I get the revs up over 4000 and really get on it.
This is also when the engine has had time to warm up. I used to get knock
when the engine was cold, but I had taken it to the dealer for a bad air
bypass valve at about $30,000, and the dealer said that that they re-flashed
an update to the ECM and I never notice the cold engine knock after that.
If anyone gets a chance and has similar miles and has never changed their
plugs, do me a favor. When you are on a highway and going about 60,
downshift to 3rd and floor it. Any knock???
Thank you for the replies,
Is the knock sound like a timing/low octane fuel knock? Do those cars still
have distributors? If so check your timing. If not, try running a tank of 93
or 94 octane thorugh it (or whatever your highest octane pump gas is) and
see if it makes a difference. These days auto makers often run timing right
on the edge of knocking through the use of knock sensors. Could be something
it out of whack, maybe the knock sensor isn't working right or something has
changed messing up the computer's caculations. Running higher octane fuel
could compensate enough to stop the knocking. Of course if the knock isn't a
timing or fuel octane type of knock you can disregard all this.
I never said anything about cleaning an engine. I would assume at only
62,000 miles it's still pretty clean. Regardless, if you're gonna clean an
engine the only way to do it properly (and the onyl way worth doing) is to
take it apart. It sounds to me like there is a good chance the timing may be
too far advanced. Whatever the reason may be, running the highest octane
fuel available will help to rule that out. If it still makes the same noise
with no improvement on 94 octane, then it's most likely not a timing related
I don't like computers in cars, and I don't know a whole lot about
particular models on new cars. They just plain don't interest me.
I never said to continue to run higher octane fuel. By running a higher
octane fuel it can be determined if the noise is pinging. If it is, the
problem (most likely timing, but also possibly a lean mixture, or a handful
of other things) then you know that much mroe about it and it will point you
in the right direction for a solution. If pinging is not the problem,
running 94 octane (or wahtever the highest pump gas is in the OPs location)
is a cheap way to rule out pinging as the problem.
So buddy, I don't know what you've got shoved up your ass, but it seems that
most Mustang groups with any of the late model stuff have a sizeable amount
of know-it-alls like you who are on a hair-trigger to bash anyone who comes
along. That's why I normally keep to FordMuscle... Great friendly
environment with a _LOT_ of knowledgeable people, who also happen to respect
eachother. I suppose it would be ludicrous to expect the same level of
respect on Usenet...
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.