Jeeps Canada - Jeep Forums

Page 2 of 4

Show 40 post(s) from this thread on one page

Jeeps Canada - Jeep Forums (https://www.jeepscanada.com/)

- Jeep Mailing List (https://www.jeepscanada.com/jeep-mailing-list-32/)

- - Hesitating XJ (https://www.jeepscanada.com/jeep-mailing-list-32/hesitating-xj-5812/)

Kevin in San Diego

10-14-2003 01:04 AM

Re: Hesitating XJ

It couldnt hurt to carry a fuel pump relay.
KH

"Will Honea" <whonea@codenet.net> wrote in message
news:JxX2tWiP5BNp-pn2-Cb0Pf6ZyF9NZ@ANON.NONE.NET...
> On Mon, 13 Oct 2003 17:28:14 UTC elmangle@hotmail.com (Rod Frazier)
> wrote:
>
> > Help. We have an '89 XJ with the 4.0 that we keep at our winter home
> > in Mexico and it has recently started hesitating at light load in
> > overdrive. Feels like the ignition is completely turned off for just
> > an instant. It may happen once or twice in 20 miles or it may do it
> > every minute or so. If we shift out of overdrive and increase the
> > revs a bit, it either doesn't do it or we can't feel it because of the
> > increased engine speed. I've replaced the plugs, wires, cap and
> > rotor, and run through two cans of injection cleaner and checked all
> > the vital connectors, including the one to the CPS, which has given me
> > trouble in the past. I'm leaving for Mexico this week and would like
> > to take down with me any replacement parts that might solve the
> > problem. Anyone run across this phenomenon before?
>
> See if it does the same thing in 1st/2nd at low speed, light load -
> about the same conditions you would get in a parking lot cruising
> around looking for a parking spot. That was the final step on my 88
> when I was trying to get it to run right and a new O2 sensor cured
> that. If it's just under load, like high or overdrive when it's
> pulling hard, Bill had the best idea: CPS and a real tuneup.
>
> --
> Will Honea <whonea@codenet.net>

Kevin in San Diego

10-14-2003 01:04 AM

Re: Hesitating XJ

Kevin in San Diego

10-14-2003 01:04 AM

Re: Hesitating XJ

Rod Frazier

10-14-2003 08:45 PM

Re: Hesitating XJ

"Kevin in San Diego" <kevin_hedstrom@yahoo.com> wrote in message news:<BtLib.70216$gv5.66526@fed1read05>...
> It couldnt hurt to carry a fuel pump relay.
> KH
>
> "Will Honea" <whonea@codenet.net> wrote in message
> news:JxX2tWiP5BNp-pn2-Cb0Pf6ZyF9NZ@ANON.NONE.NET...
> > On Mon, 13 Oct 2003 17:28:14 UTC elmangle@hotmail.com (Rod Frazier)
> > wrote:
> >
> > > Help. We have an '89 XJ with the 4.0 that we keep at our winter home
> > > in Mexico and it has recently started hesitating at light load in
> > > overdrive. Feels like the ignition is completely turned off for just
> > > an instant. It may happen once or twice in 20 miles or it may do it
> > > every minute or so. If we shift out of overdrive and increase the
> > > revs a bit, it either doesn't do it or we can't feel it because of the
> > > increased engine speed. I've replaced the plugs, wires, cap and
> > > rotor, and run through two cans of injection cleaner and checked all
> > > the vital connectors, including the one to the CPS, which has given me
> > > trouble in the past. I'm leaving for Mexico this week and would like
> > > to take down with me any replacement parts that might solve the
> > > problem. Anyone run across this phenomenon before?
> >
> > See if it does the same thing in 1st/2nd at low speed, light load -
> > about the same conditions you would get in a parking lot cruising
> > around looking for a parking spot. That was the final step on my 88
> > when I was trying to get it to run right and a new O2 sensor cured
> > that. If it's just under load, like high or overdrive when it's
> > pulling hard, Bill had the best idea: CPS and a real tuneup.
> >
> > --
> > Will Honea <whonea@codenet.net>

Thanks, Kevin. Thanks, Will. It just does it on the road, often when
you start up a slight incline requiring just a very light additional
load. I guess I'll have to bite the financial bullet and take down a
pocket-load of sensors and relays. The local mechanics have no
diagnostic equipment and the nearest dealer is two hours away in La
Paz and may also be not too well equipped or trained. This may be my
primary winter project. At least then I can answer the eternal
question of "What do you do all winter in Baja"?

Rod Frazier

10-14-2003 08:45 PM

Re: Hesitating XJ

Rod Frazier

10-14-2003 08:45 PM

Re: Hesitating XJ

Will Honea

10-15-2003 01:32 AM

Re: Hesitating XJ

I would start by cleaning the connectors around the throttle body -
Throttle Position Sensor (TPS), Idle Air Control (IAC) - then get the
MAP Sensor (up on the firewall) and the CPS connector (next to the
fiewall pretty much under the MAP Sensor and behind the fuel rail).
Wash them out with WD40, scrub with a stiff brush, blow dry and
re-connect. Use a bit of silicone grease on the connector seals when
you put them back. That might cure the problem and save you some
swearing and skinned knuckles. BTW, for the CPS, I drop the front end
of the front drive shaft so that I have more room to work. That CPS
is a PITA to reach and I still have to use a couple of long extensions
but moveing the shaft out of the way helps a lot.

On Wed, 15 Oct 2003 00:45:05 UTC elmangle@hotmail.com (Rod Frazier)
wrote:

> "Kevin in San Diego" <kevin_hedstrom@yahoo.com> wrote in message news:<BtLib.70216$gv5.66526@fed1read05>...
> > It couldnt hurt to carry a fuel pump relay.
> > KH
> >
> > "Will Honea" <whonea@codenet.net> wrote in message
> > news:JxX2tWiP5BNp-pn2-Cb0Pf6ZyF9NZ@ANON.NONE.NET...
> > > On Mon, 13 Oct 2003 17:28:14 UTC elmangle@hotmail.com (Rod Frazier)
> > > wrote:
> > >
> > > > Help. We have an '89 XJ with the 4.0 that we keep at our winter home
> > > > in Mexico and it has recently started hesitating at light load in
> > > > overdrive. Feels like the ignition is completely turned off for just
> > > > an instant. It may happen once or twice in 20 miles or it may do it
> > > > every minute or so. If we shift out of overdrive and increase the
> > > > revs a bit, it either doesn't do it or we can't feel it because of the
> > > > increased engine speed. I've replaced the plugs, wires, cap and
> > > > rotor, and run through two cans of injection cleaner and checked all
> > > > the vital connectors, including the one to the CPS, which has given me
> > > > trouble in the past. I'm leaving for Mexico this week and would like
> > > > to take down with me any replacement parts that might solve the
> > > > problem. Anyone run across this phenomenon before?
> > >
> > > See if it does the same thing in 1st/2nd at low speed, light load -
> > > about the same conditions you would get in a parking lot cruising
> > > around looking for a parking spot. That was the final step on my 88
> > > when I was trying to get it to run right and a new O2 sensor cured
> > > that. If it's just under load, like high or overdrive when it's
> > > pulling hard, Bill had the best idea: CPS and a real tuneup.
> > >
> > > --
> > > Will Honea <whonea@codenet.net>
>
> Thanks, Kevin. Thanks, Will. It just does it on the road, often when
> you start up a slight incline requiring just a very light additional
> load. I guess I'll have to bite the financial bullet and take down a
> pocket-load of sensors and relays. The local mechanics have no
> diagnostic equipment and the nearest dealer is two hours away in La
> Paz and may also be not too well equipped or trained. This may be my
> primary winter project. At least then I can answer the eternal
> question of "What do you do all winter in Baja"?

--
Will Honea <whonea@codenet.net>

Will Honea

10-15-2003 01:32 AM

Re: Hesitating XJ

Will Honea

10-15-2003 01:32 AM

Re: Hesitating XJ

Rod Frazier

10-15-2003 10:02 AM

Re: Hesitating XJ

"Will Honea" <whonea@codenet.net> wrote in message news:<JxX2tWiP5BNp-pn2-Ed4QvuHbXFqO@anon.none.net>...
> I would start by cleaning the connectors around the throttle body -
> Throttle Position Sensor (TPS), Idle Air Control (IAC) - then get the
> MAP Sensor (up on the firewall) and the CPS connector (next to the
> fiewall pretty much under the MAP Sensor and behind the fuel rail).
> Wash them out with WD40, scrub with a stiff brush, blow dry and
> re-connect. Use a bit of silicone grease on the connector seals when
> you put them back. That might cure the problem and save you some
> swearing and skinned knuckles. BTW, for the CPS, I drop the front end
> of the front drive shaft so that I have more room to work. That CPS
> is a PITA to reach and I still have to use a couple of long extensions
> but moveing the shaft out of the way helps a lot.
>
> On Wed, 15 Oct 2003 00:45:05 UTC elmangle@hotmail.com (Rod Frazier)
> wrote:
>
> > "Kevin in San Diego" <kevin_hedstrom@yahoo.com> wrote in message news:<BtLib.70216$gv5.66526@fed1read05>...
> > > It couldnt hurt to carry a fuel pump relay.
> > > KH
> > >
> > > "Will Honea" <whonea@codenet.net> wrote in message
> > > news:JxX2tWiP5BNp-pn2-Cb0Pf6ZyF9NZ@ANON.NONE.NET...
> > > > On Mon, 13 Oct 2003 17:28:14 UTC elmangle@hotmail.com (Rod Frazier)
> > > > wrote:
> > > >
> > > > > Help. We have an '89 XJ with the 4.0 that we keep at our winter home
> > > > > in Mexico and it has recently started hesitating at light load in
> > > > > overdrive. Feels like the ignition is completely turned off for just
> > > > > an instant. It may happen once or twice in 20 miles or it may do it
> > > > > every minute or so. If we shift out of overdrive and increase the
> > > > > revs a bit, it either doesn't do it or we can't feel it because of the
> > > > > increased engine speed. I've replaced the plugs, wires, cap and
> > > > > rotor, and run through two cans of injection cleaner and checked all
> > > > > the vital connectors, including the one to the CPS, which has given me
> > > > > trouble in the past. I'm leaving for Mexico this week and would like
> > > > > to take down with me any replacement parts that might solve the
> > > > > problem. Anyone run across this phenomenon before?
> > > >
> > > > See if it does the same thing in 1st/2nd at low speed, light load -
> > > > about the same conditions you would get in a parking lot cruising
> > > > around looking for a parking spot. That was the final step on my 88
> > > > when I was trying to get it to run right and a new O2 sensor cured
> > > > that. If it's just under load, like high or overdrive when it's
> > > > pulling hard, Bill had the best idea: CPS and a real tuneup.
> > > >
> > > > --
> > > > Will Honea <whonea@codenet.net>
> >
> > Thanks, Kevin. Thanks, Will. It just does it on the road, often when
> > you start up a slight incline requiring just a very light additional
> > load. I guess I'll have to bite the financial bullet and take down a
> > pocket-load of sensors and relays. The local mechanics have no
> > diagnostic equipment and the nearest dealer is two hours away in La
> > Paz and may also be not too well equipped or trained. This may be my
> > primary winter project. At least then I can answer the eternal
> > question of "What do you do all winter in Baja"?

Good ideas. I actually changed a CPS a couple of years ago when the
problem was just a poor connection but have repressed just how
difficult it was. I suppose it'll all come back to me. For sure I'll
do the check-the-connectors drill first, with all fingers and toes
crossed. I'd much rather be fishing than skinning knuckles.

All times are GMT -4. The time now is 09:21 AM.

Page 2 of 4

Show 40 post(s) from this thread on one page

Page generated in 0.06159 seconds with 5 queries