2000 XJ Starting Problems

2000 xj....hold gas petal down and engine starts....lift off foot and jeep
stalls....this thing has no outside fuel filter ??...any help be greatly
appreciated...

Clean your throttle position sensor connector.

"DRRanchTx" > wrote in message
k.net...
> 2000 xj....hold gas petal down and engine starts....lift off foot and jeep
> stalls....this thing has no outside fuel filter ??...any help be greatly
> appreciated...
>

DRRanchTx did pass the time by typing:
> 2000 xj....hold gas petal down and engine starts....lift off foot and jeep
> stalls....this thing has no outside fuel filter ??...any help be greatly
> appreciated...

Like Matt said, clean the TPS connectors

http://revbeergoggles.com/tb/tb.html
Also clean the throttle body idle air passage.

Holding your foot down on a fuel injected vehicle is not the
same as a carb. A foot-down start tells the computer something is
wrong with the sensor circuit and puts the computer into a limp
mode while it tries to start the engine. Since it isn't keeping on
running there is something wrong and should be a trouble code set.

Pull the codes.
http://www.wjjeeps.com/faultcodes.htm

ignition on-off-on-off-on
then record what comes up on the odometer. Yours should send codes there.

--
DougW

DougW wrote:
>
> DRRanchTx did pass the time by typing:
> > 2000 xj....hold gas petal down and engine starts....lift off foot and jeep
> > stalls....this thing has no outside fuel filter ??...any help be greatly
> > appreciated...
>
> Like Matt said, clean the TPS connectors
>
> http://revbeergoggles.com/tb/tb.html
> Also clean the throttle body idle air passage.
>
> Holding your foot down on a fuel injected vehicle is not the
> same as a carb. A foot-down start tells the computer something is
> wrong with the sensor circuit and puts the computer into a limp
> mode while it tries to start the engine. Since it isn't keeping on
> running there is something wrong and should be a trouble code set.
>
> Pull the codes.
> http://www.wjjeeps.com/faultcodes.htm
>
> ignition on-off-on-off-on
> then record what comes up on the odometer. Yours should send codes there.
>
> --
> DougW

Sometimes holding the gas pedal down on a Cherokee gives the body an
electrical ground....

I would be checking the wire mesh strap from the head to the firewall on
it also.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

thnks for the reply....do I need to remove the senser from the body of the
throttle or just where the plug meets the unit and spray there


"Matt Macchiarolo" > wrote in message
. ..
> Clean your throttle position sensor connector.
>
> "DRRanchTx" > wrote in message
> k.net...
>> 2000 xj....hold gas petal down and engine starts....lift off foot and
>> jeep stalls....this thing has no outside fuel filter ??...any help be
>> greatly appreciated...
>>
>
>

hnks for the reply....do I need to remove the senser from the body of the
throttle or just where the plug meets the unit and spray there

"DougW" > wrote in message
news:6pzpg.58515$9c6.5502@dukeread11...
> DRRanchTx did pass the time by typing:
>> 2000 xj....hold gas petal down and engine starts....lift off foot and
>> jeep
>> stalls....this thing has no outside fuel filter ??...any help be greatly
>> appreciated...
>
> Like Matt said, clean the TPS connectors
>
> http://revbeergoggles.com/tb/tb.html
> Also clean the throttle body idle air passage.
>
> Holding your foot down on a fuel injected vehicle is not the
> same as a carb. A foot-down start tells the computer something is
> wrong with the sensor circuit and puts the computer into a limp
> mode while it tries to start the engine. Since it isn't keeping on
> running there is something wrong and should be a trouble code set.
>
> Pull the codes.
> http://www.wjjeeps.com/faultcodes.htm
>
> ignition on-off-on-off-on
> then record what comes up on the odometer. Yours should send codes there.
>
> --
> DougW
>

The electrical plug is usually all you need to clean on the TPS.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

DRRanchTx wrote:
>
> hnks for the reply....do I need to remove the senser from the body of the
> throttle or just where the plug meets the unit and spray there
>
> "DougW" > wrote in message
> news:6pzpg.58515$9c6.5502@dukeread11...
> > DRRanchTx did pass the time by typing:
> >> 2000 xj....hold gas petal down and engine starts....lift off foot and
> >> jeep
> >> stalls....this thing has no outside fuel filter ??...any help be greatly
> >> appreciated...
> >
> > Like Matt said, clean the TPS connectors
> >
> > http://revbeergoggles.com/tb/tb.html
> > Also clean the throttle body idle air passage.
> >
> > Holding your foot down on a fuel injected vehicle is not the
> > same as a carb. A foot-down start tells the computer something is
> > wrong with the sensor circuit and puts the computer into a limp
> > mode while it tries to start the engine. Since it isn't keeping on
> > running there is something wrong and should be a trouble code set.
> >
> > Pull the codes.
> > http://www.wjjeeps.com/faultcodes.htm
> >
> > ignition on-off-on-off-on
> > then record what comes up on the odometer. Yours should send codes there.
> >
> > --
> > DougW
> >

DRRanchTx did pass the time by typing:
> hnks for the reply....do I need to remove the senser from the body of the
> throttle or just where the plug meets the unit and spray there

Get some contact cleaner that is safe for plastic.
Before you spray the contacts, put some paper towel around and use a bit
of cardboard to keep any of the contact cleaner off of the paint. Contact
cleaner is very good paint remover. It's also a very good idea to wear
eye protection.

Disconnect the plug, spray the contacts, work them a bit with a
toothpick, spray again, let dry, then put a bit of dilectric grease
(sparkplug grease) in the socket and on the gasket. Then reassemble.


If your moderatly skilled with electronics and have a digital volt meter
you can test the TPS sensor. There are three leads. one is ground, one
is voltage, and the other varies as you move the throttle body.

Basically:
Turn the ignition on but do not start the jeep.
back-probe the connector and find the ground and +5v
(should be the outside two wires)
If there isn't 5v there then you might have a break in the harness
or just not a good contact with the wire.
Now measure the center wire against the ground.

Throttle butterfly Voltage
CLOSED >200 mV
OPEN <4.8 V

The transition between full open and closed should be smooth
with no jumps or dropouts.

--
DougW

thanks to all...cleaned the contacts as well as the gummy throttle
body.....will do this to my 2001 Grand w/4.0 engine as well...thanks again
for money saved and this wonderful line of jeep folks...have a safe 4th





"DRRanchTx" > wrote in message
k.net...
> 2000 xj....hold gas petal down and engine starts....lift off foot and jeep
> stalls....this thing has no outside fuel filter ??...any help be greatly
> appreciated...
>

Mindy did pass the time by typing:
> thanks to all...cleaned the contacts as well as the gummy throttle
> body.....will do this to my 2001 Grand w/4.0 engine as well...thanks again
> for money saved and this wonderful line of jeep folks...have a safe 4th

Glad to know that helped.

Have a safe 4th as well.

--
DougW