reetrulez

im having a problem wit my 99 Crown Vic. its a police interceptor. has
102,000 miles on it. its been havin this problem since iv had it for a
little more than a year. when im driving it starts hestitating and
kind of jerking and it feels like its loosing power once i hit 40 mph
then stops once i hit around 50. i had changed the spark plugs, it
went away for a few weeks, then i changed the wires, went away for a
few days then came bak, then i changed the fuel filter, which was
partialy blocked, same thing helped for a few days then came bak.i
changed the transmission oil and filter when i got the car which was
18,000 miles ago. I as jus wondering if anyone knew what it could be
or what i can do to fix it? thanks

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tom

did you clean the throttle body??
"reetrulez" <UseLinkToEmail@AutoForumz.com> wrote in message
news:1_684841_2b47f441e6ccade84e9668ef42c28650@autoforumz.com...
> im having a problem wit my 99 Crown Vic. its a police interceptor. has
> 102,000 miles on it. its been havin this problem since iv had it for a
> little more than a year. when im driving it starts hestitating and
> kind of jerking and it feels like its loosing power once i hit 40 mph
> then stops once i hit around 50. i had changed the spark plugs, it
> went away for a few weeks, then i changed the wires, went away for a
> few days then came bak, then i changed the fuel filter, which was
> partialy blocked, same thing helped for a few days then came bak.i
> changed the transmission oil and filter when i got the car which was
> 18,000 miles ago. I as jus wondering if anyone knew what it could be
> or what i can do to fix it? thanks
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
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JR

check out www.crownvic.net for info and help

reetrulez wrote:

> im having a problem wit my 99 Crown Vic. its a police interceptor. has
> 102,000 miles on it. its been havin this problem since iv had it for a
> little more than a year. when im driving it starts hestitating and
> kind of jerking and it feels like its loosing power once i hit 40 mph
> then stops once i hit around 50. i had changed the spark plugs, it
> went away for a few weeks, then i changed the wires, went away for a
> few days then came bak, then i changed the fuel filter, which was
> partialy blocked, same thing helped for a few days then came bak.i
> changed the transmission oil and filter when i got the car which was
> 18,000 miles ago. I as jus wondering if anyone knew what it could be
> or what i can do to fix it? thanks
>
> --
> Posted using the http://www.autoforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL: http://www.autoforumz.com/Ford-Mecur...ict141653.html
> Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.autoforumz.com/eform.php?p=684841
>
> Posted Via Usenet.com Premium Usenet Newsgroup Services
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Backyard Mechanic

Yeah... doesnt sound like that would ever happen on anything but the
CV/GM/TC apps!

Shish!

Please -reetrulez- ALSO check on there.. but when you find it, we would
appreciate it if you came back and told us.

The fact that it goes away for a few days every time you work on it is
pertinent, i think.

Have you by any chance disconnected the battery each time?

Have the codes read and see if there's anything there.

Try:

Disconnecting MAF once car's warmed up and see if it occurs
- Also if it starts and runs WORSE immediately, you have a sensor problem
other than MAF

Disconnect battery for half hour.. see if paradigm repeats.



JR <chowrunner@spamlessverizon.net> wrote in
news:434BA0BB.5DEAAE2E@spamlessverizon.net:

> check out www.crownvic.net for info and help
>
> reetrulez wrote:
>
>> im having a problem wit my 99 Crown Vic. its a police interceptor.
>> has 102,000 miles on it. its been havin this problem since iv had it
>> for a little more than a year. when im driving it starts hestitating
>> and kind of jerking and it feels like its loosing power once i hit 40
>> mph then stops once i hit around 50. i had changed the spark plugs,
>> it went away for a few weeks, then i changed the wires, went away for
>> a few days then came bak, then i changed the fuel filter, which was
>> partialy blocked, same thing helped for a few days then came bak.i
>> changed the transmission oil and filter when i got the car which was
>> 18,000 miles ago. I as jus wondering if anyone knew what it could be
>> or what i can do to fix it? thanks

clemdog

more than likely you are experiencing what they call torque converter
shutter.the converter has a clutch internally and the plates become
warped.most noticable at approx. 40mph.probably can make it consistently
if you accelerate up to 45mph at a very light throttle.can also shutter on
acceleration from cruise if trans downshifts.only real repair is
replacement.

Mike Hunter

Check with a Ford dealer. Depending on the model year some 4sp tyranny's
have a modular that goes bad and causes a shutter, as well

mike hunt


"clemdog" <mcw.tx@nospam.sbcglobal.net> wrote in message
news:df3093dca9c098e8c393aad63c3ae2a9@localhost.talkaboutautos.com...
> more than likely you are experiencing what they call torque converter
> shutter.the converter has a clutch internally and the plates become
> warped.most noticable at approx. 40mph.probably can make it consistently
> if you accelerate up to 45mph at a very light throttle.can also shutter on
> acceleration from cruise if trans downshifts.only real repair is
> replacement.
>

Happy Traveler

If you meant 'modulator', there is none on the 4R70W transmission used on
CVs since the mid 90's. Computer controlled transmissions like this one
don't need to sense manifold pressure, because this information (and a lot
more) is available to the computer.

"Mike Hunter" <mikehunt2@mailcity.com> wrote in message
news:LZOdnaP8wb3Zo9HeUSdV9g@ptd.net...
> Check with a Ford dealer. Depending on the model year some 4sp tyranny's
> have a modular that goes bad and causes a shutter, as well
>
> mike hunt

tom

actually, what mike was referring to is the torque converter lockup solenoid
"Happy Traveler" <happy@nospam.comcast.net> wrote in message
news:sM2dnQZlycKmcNDeRVn-tQ@comcast.com...
> If you meant 'modulator', there is none on the 4R70W transmission used on
> CVs since the mid 90's. Computer controlled transmissions like this one
> don't need to sense manifold pressure, because this information (and a lot
> more) is available to the computer.
>
> "Mike Hunter" <mikehunt2@mailcity.com> wrote in message
> news:LZOdnaP8wb3Zo9HeUSdV9g@ptd.net...
> > Check with a Ford dealer. Depending on the model year some 4sp
tyranny's
> > have a modular that goes bad and causes a shutter, as well
> >
> > mike hunt
>
>

reetrulez

"" wrote:
> actually, what mike was referring to is the torque converter
> lockup solenoid
> "Happy Traveler" <happy@nospam.comcast.net> wrote in message
> news:sM2dnQZlycKmcNDeRVn-tQ@comcast.com...
> > If you meant 'modulator', there is none on the 4R70W
> transmission used on
> > CVs since the mid 90's. Computer controlled transmissions
> like this one
> > don't need to sense manifold pressure, because this
> information (and a lot
> > more) is available to the computer.
> >
> > "Mike Hunter" <mikehunt2@mailcity.com> wrote in message
> > news:LZOdnaP8wb3Zo9HeUSdV9g@ptd.net...
> > > Check with a Ford dealer. Depending on the model year
> some 4sp
> tyranny's
> > > have a modular that goes bad and causes a shutter, as well
> > >
> > > mike hunt
> >
> >

actually my cousin told me he had almost the same problem with his 92
crown vic, he said he cleaned the EGR sensor and his car ran fine. i
think i were to clean that and the MAR sensor. ya’ll think that could
possibilly be a problem?

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Backyard Mechanic

reetrulez <UseLinkToEmail@www.autoforumz.com> wrote in news:687262_
29a3d1316fd42fc44c15f0ecd71b97f0@autoforumz.com:



> actually my cousin told me he had almost the same problem with his 92
> crown vic, he said he cleaned the EGR sensor and his car ran fine. i
> think i were to clean that and the MAR sensor. ya’ll think that could
> possibilly be a problem?
>

Did you bother reading my suggestion about the MAF, retrule?

Generally these things cannot be resolved purely by thinking about it.