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99 JGC Laredo 4.0L I6 stalling
I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles,
Selec-Trac 4WD... Earlier in the month we had snow and record rainfall which cause flooding and an awful lot of standing water in areas where I drive. To keep a long story short, I'm guessing that something that shouldn't have gotten wet must have because the engine check light came on and the problems started occurring: The trouble codes that came up were: P1596 (Speed control switch), and P0123 (Throttle position sensor). After starting the engine, the rpms would race up past 2k then come back down to normal. When slowing down or stopping it would stall and die. I could easily start it again, but having this happen in traffic is a pain and possibly dangerous. Needing the car, I took it to a local shop and they were able to fix/clear the P1596 trouble code by cleaning/drying the connections to the sensors, but the P0123 code remains even after they installed a new TPS. So it still stalls intermittenly and always at the most incovienent time. I also noticed that as certain times around 20-25 mph it would hiccup for lack of a better word. This would happend when I needed speed/power. Before my Jeep ran like a champ, no probems whatsoever... now it needs a little help to get back to its old self... Any information, suggestions, possible fixes would highly be appreciated! Thank you, Nelson |
Re: 99 JGC Laredo 4.0L I6 stalling
On Sun, 16 Dec 2007 10:10:30 -0800, lost_dogma
<lost.dogma(_remove_)@gmail.com> wrote: >I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, >Selec-Trac 4WD... > >Earlier in the month we had snow and record rainfall which cause >flooding and an awful lot of standing water in areas where I drive. >To keep a long story short, I'm guessing that something that shouldn't >have gotten wet must have because the engine check light came on and >the problems started occurring: The trouble codes that came up were: > >P1596 (Speed control switch), and P0123 (Throttle position sensor). > >After starting the engine, the rpms would race up past 2k then come >back down to normal. When slowing down or stopping it would stall and >die. I could easily start it again, but having this happen in traffic >is a pain and possibly dangerous. Needing the car, I took it to a >local shop and they were able to fix/clear the P1596 trouble code by >cleaning/drying the connections to the sensors, but the P0123 code >remains even after they installed a new TPS. So it still stalls >intermittenly and always at the most incovienent time. I also noticed >that as certain times around 20-25 mph it would hiccup for lack of a >better word. This would happend when I needed speed/power. > >Before my Jeep ran like a champ, no probems whatsoever... >now it needs a little help to get back to its old self... > >Any information, suggestions, possible fixes would highly be >appreciated! > >Thank you, >Nelson P.S. I forgot to mention that the cruise control no longer works either. |
Re: 99 JGC Laredo 4.0L I6 stalling
On Sun, 16 Dec 2007 10:10:30 -0800, lost_dogma
<lost.dogma(_remove_)@gmail.com> wrote: >I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, >Selec-Trac 4WD... > >Earlier in the month we had snow and record rainfall which cause >flooding and an awful lot of standing water in areas where I drive. >To keep a long story short, I'm guessing that something that shouldn't >have gotten wet must have because the engine check light came on and >the problems started occurring: The trouble codes that came up were: > >P1596 (Speed control switch), and P0123 (Throttle position sensor). > >After starting the engine, the rpms would race up past 2k then come >back down to normal. When slowing down or stopping it would stall and >die. I could easily start it again, but having this happen in traffic >is a pain and possibly dangerous. Needing the car, I took it to a >local shop and they were able to fix/clear the P1596 trouble code by >cleaning/drying the connections to the sensors, but the P0123 code >remains even after they installed a new TPS. So it still stalls >intermittenly and always at the most incovienent time. I also noticed >that as certain times around 20-25 mph it would hiccup for lack of a >better word. This would happend when I needed speed/power. > >Before my Jeep ran like a champ, no probems whatsoever... >now it needs a little help to get back to its old self... > >Any information, suggestions, possible fixes would highly be >appreciated! > >Thank you, >Nelson P.S. I forgot to mention that the cruise control no longer works either. |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> On Sun, 16 Dec 2007 10:10:30 -0800, lost_dogma > <lost.dogma(_remove_)@gmail.com> wrote: > >> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 >> miles, Selec-Trac 4WD... >> >> Earlier in the month we had snow and record rainfall which cause >> flooding and an awful lot of standing water in areas where I drive. >> To keep a long story short, I'm guessing that something that >> shouldn't have gotten wet must have because the engine check light >> came on and the problems started occurring: The trouble codes that >> came up were: >> >> P1596 (Speed control switch), and P0123 (Throttle position sensor). >> >> After starting the engine, the rpms would race up past 2k then come >> back down to normal. When slowing down or stopping it would stall >> and die. I could easily start it again, but having this happen in >> traffic is a pain and possibly dangerous. Needing the car, I took >> it to a local shop and they were able to fix/clear the P1596 trouble >> code by cleaning/drying the connections to the sensors, but the >> P0123 code remains even after they installed a new TPS. So it still >> stalls intermittenly and always at the most incovienent time. I also >> noticed that as certain times around 20-25 mph it would hiccup for >> lack of a better word. This would happend when I needed speed/power. >> >> Before my Jeep ran like a champ, no probems whatsoever... >> now it needs a little help to get back to its old self... >> >> Any information, suggestions, possible fixes would highly be >> appreciated! >> >> Thank you, >> Nelson > > P.S. I forgot to mention that the cruise control no longer works > either. Apart from checking fuses. Stalls on stop can be the CPS (Crankshaft Position Sensor) It's down on the transmission. Follow the wire up and clean the connector. You could also clean the IAC passage in the throttle body. http://revbeergoggles.com/tb/tb.html The loss of cruise sounds like power or vacuum. Check the vac lines off the back of the intake rail to make sure none of them have come loose. -- DougW |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> On Sun, 16 Dec 2007 10:10:30 -0800, lost_dogma > <lost.dogma(_remove_)@gmail.com> wrote: > >> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 >> miles, Selec-Trac 4WD... >> >> Earlier in the month we had snow and record rainfall which cause >> flooding and an awful lot of standing water in areas where I drive. >> To keep a long story short, I'm guessing that something that >> shouldn't have gotten wet must have because the engine check light >> came on and the problems started occurring: The trouble codes that >> came up were: >> >> P1596 (Speed control switch), and P0123 (Throttle position sensor). >> >> After starting the engine, the rpms would race up past 2k then come >> back down to normal. When slowing down or stopping it would stall >> and die. I could easily start it again, but having this happen in >> traffic is a pain and possibly dangerous. Needing the car, I took >> it to a local shop and they were able to fix/clear the P1596 trouble >> code by cleaning/drying the connections to the sensors, but the >> P0123 code remains even after they installed a new TPS. So it still >> stalls intermittenly and always at the most incovienent time. I also >> noticed that as certain times around 20-25 mph it would hiccup for >> lack of a better word. This would happend when I needed speed/power. >> >> Before my Jeep ran like a champ, no probems whatsoever... >> now it needs a little help to get back to its old self... >> >> Any information, suggestions, possible fixes would highly be >> appreciated! >> >> Thank you, >> Nelson > > P.S. I forgot to mention that the cruise control no longer works > either. Apart from checking fuses. Stalls on stop can be the CPS (Crankshaft Position Sensor) It's down on the transmission. Follow the wire up and clean the connector. You could also clean the IAC passage in the throttle body. http://revbeergoggles.com/tb/tb.html The loss of cruise sounds like power or vacuum. Check the vac lines off the back of the intake rail to make sure none of them have come loose. -- DougW |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, > Selec-Trac 4WD... > > Earlier in the month we had snow and record rainfall which cause > flooding and an awful lot of standing water in areas where I drive. > To keep a long story short, I'm guessing that something that shouldn't > have gotten wet must have because the engine check light came on and > the problems started occurring: The trouble codes that came up were: > > P1596 (Speed control switch), and P0123 (Throttle position sensor). > > After starting the engine, the rpms would race up past 2k then come > back down to normal. When slowing down or stopping it would stall and > die. I could easily start it again, but having this happen in traffic > is a pain and possibly dangerous. Needing the car, I took it to a > local shop and they were able to fix/clear the P1596 trouble code by > cleaning/drying the connections to the sensors, but the P0123 code > remains even after they installed a new TPS. So it still stalls > intermittenly and always at the most incovienent time. I also noticed > that as certain times around 20-25 mph it would hiccup for lack of a > better word. This would happend when I needed speed/power. > > Before my Jeep ran like a champ, no probems whatsoever... > now it needs a little help to get back to its old self... > > Any information, suggestions, possible fixes would highly be > appreciated! I'm guessing this has an auto transmission, which probably means 2 throttle position sensors in a stack. More to the point, it will mean 2 connectors. Given the circumstances, I would be pulling the connectors apart and clean them with contact cleaner and a stiff brush. In a pinch, WD40 will do a fair job, but you need to clean the contacts, not just blow them dry. When you re-connect them, coat the rubber seal ring on the connector with silicone grease (spark plug grease) before you plug them in. Then repeat for the Crank Position Sensor (CPS) and Manifold Air Pressure (MAP) sensor. All are sensitive to moisture and prone to build up some corrosion. Odds on, if they just blew the water out they didn't really get the connectors clean. -- Will Honea -- Posted via a free Usenet account from http://www.teranews.com |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, > Selec-Trac 4WD... > > Earlier in the month we had snow and record rainfall which cause > flooding and an awful lot of standing water in areas where I drive. > To keep a long story short, I'm guessing that something that shouldn't > have gotten wet must have because the engine check light came on and > the problems started occurring: The trouble codes that came up were: > > P1596 (Speed control switch), and P0123 (Throttle position sensor). > > After starting the engine, the rpms would race up past 2k then come > back down to normal. When slowing down or stopping it would stall and > die. I could easily start it again, but having this happen in traffic > is a pain and possibly dangerous. Needing the car, I took it to a > local shop and they were able to fix/clear the P1596 trouble code by > cleaning/drying the connections to the sensors, but the P0123 code > remains even after they installed a new TPS. So it still stalls > intermittenly and always at the most incovienent time. I also noticed > that as certain times around 20-25 mph it would hiccup for lack of a > better word. This would happend when I needed speed/power. > > Before my Jeep ran like a champ, no probems whatsoever... > now it needs a little help to get back to its old self... > > Any information, suggestions, possible fixes would highly be > appreciated! I'm guessing this has an auto transmission, which probably means 2 throttle position sensors in a stack. More to the point, it will mean 2 connectors. Given the circumstances, I would be pulling the connectors apart and clean them with contact cleaner and a stiff brush. In a pinch, WD40 will do a fair job, but you need to clean the contacts, not just blow them dry. When you re-connect them, coat the rubber seal ring on the connector with silicone grease (spark plug grease) before you plug them in. Then repeat for the Crank Position Sensor (CPS) and Manifold Air Pressure (MAP) sensor. All are sensitive to moisture and prone to build up some corrosion. Odds on, if they just blew the water out they didn't really get the connectors clean. -- Will Honea -- Posted via a free Usenet account from http://www.teranews.com |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, > Selec-Trac 4WD... > > Earlier in the month we had snow and record rainfall which cause > flooding and an awful lot of standing water in areas where I drive. > To keep a long story short, I'm guessing that something that shouldn't > have gotten wet must have because the engine check light came on and > the problems started occurring: The trouble codes that came up were: > > P1596 (Speed control switch), and P0123 (Throttle position sensor). > > After starting the engine, the rpms would race up past 2k then come > back down to normal. When slowing down or stopping it would stall and > die. I could easily start it again, but having this happen in traffic > is a pain and possibly dangerous. Needing the car, I took it to a > local shop and they were able to fix/clear the P1596 trouble code by > cleaning/drying the connections to the sensors, but the P0123 code > remains even after they installed a new TPS. So it still stalls > intermittenly and always at the most incovienent time. I also noticed > that as certain times around 20-25 mph it would hiccup for lack of a > better word. This would happend when I needed speed/power. > > Before my Jeep ran like a champ, no probems whatsoever... > now it needs a little help to get back to its old self... > > Any information, suggestions, possible fixes would highly be > appreciated! > > Thank you, > Nelson You are still describing a TPS connection failure with the racing and stalling. The new part only cleaned 'half' the connection. Spray contact cleaner or even WD40 is called for like Will mentions. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 'New' frame in the works for '08. Some Canadian Bush Trip and Build Photos: http://mikeromainjeeptrips.shutterfly.com |
Re: 99 JGC Laredo 4.0L I6 stalling
lost_dogma wrote:
> I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, > Selec-Trac 4WD... > > Earlier in the month we had snow and record rainfall which cause > flooding and an awful lot of standing water in areas where I drive. > To keep a long story short, I'm guessing that something that shouldn't > have gotten wet must have because the engine check light came on and > the problems started occurring: The trouble codes that came up were: > > P1596 (Speed control switch), and P0123 (Throttle position sensor). > > After starting the engine, the rpms would race up past 2k then come > back down to normal. When slowing down or stopping it would stall and > die. I could easily start it again, but having this happen in traffic > is a pain and possibly dangerous. Needing the car, I took it to a > local shop and they were able to fix/clear the P1596 trouble code by > cleaning/drying the connections to the sensors, but the P0123 code > remains even after they installed a new TPS. So it still stalls > intermittenly and always at the most incovienent time. I also noticed > that as certain times around 20-25 mph it would hiccup for lack of a > better word. This would happend when I needed speed/power. > > Before my Jeep ran like a champ, no probems whatsoever... > now it needs a little help to get back to its old self... > > Any information, suggestions, possible fixes would highly be > appreciated! > > Thank you, > Nelson You are still describing a TPS connection failure with the racing and stalling. The new part only cleaned 'half' the connection. Spray contact cleaner or even WD40 is called for like Will mentions. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 'New' frame in the works for '08. Some Canadian Bush Trip and Build Photos: http://mikeromainjeeptrips.shutterfly.com |
Re: 99 JGC Laredo 4.0L I6 stalling
On Dec 18, 11:43 am, Mike Romain <roma...@sympatico.ca> wrote:
> lost_dogma wrote: > > I have a 1999 Jeep Grand Cherokee Laredo, 4.0L I6, over 130,000 miles, > > Selec-Trac 4WD... > > > Earlier in the month we had snow and record rainfall which cause > > flooding and an awful lot of standing water in areas where I drive. > > To keep a long story short, I'm guessing that something that shouldn't > > have gotten wet must have because the engine check light came on and > > the problems started occurring: The trouble codes that came up were: > > > P1596 (Speed control switch), and P0123 (Throttle position sensor). > > > After starting the engine, the rpms would race up past 2k then come > > back down to normal. When slowing down or stopping it would stall and > > die. I could easily start it again, but having this happen in traffic > > is a pain and possibly dangerous. Needing the car, I took it to a > > local shop and they were able to fix/clear the P1596 trouble code by > > cleaning/drying the connections to the sensors, but the P0123 code > > remains even after they installed a new TPS. So it still stalls > > intermittenly and always at the most incovienent time. I also noticed > > that as certain times around 20-25 mph it would hiccup for lack of a > > better word. This would happend when I needed speed/power. > > > Before my Jeep ran like a champ, no probems whatsoever... > > now it needs a little help to get back to its old self... > > > Any information, suggestions, possible fixes would highly be > > appreciated! > > > Thank you, > > Nelson > > You are still describing a TPS connection failure with the racing and > stalling. The new part only cleaned 'half' the connection. > > Spraycontact cleaneror even WD40 is called for like Will mentions. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 'New' frame in the works for '08. Some Canadian Bush Trip and Build > Photos:http://mikeromainjeeptrips.shutterfly.com- Hide quoted text - > > - Show quoted text - Yikes, not WD-40 - good temporatary fix, but could make it worse in awhile. Use deoxIT on all connections, works EVERY time. www.deoxit.com Mike |
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