Rough Idle on 1990 Jeep Wrangler
11-14-2006, 09:20 PM
#11
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Thank you for your help in getting my jeep up and running again. It
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
11-14-2006, 09:20 PM
#12
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Thank you for your help in getting my jeep up and running again. It
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
11-14-2006, 09:20 PM
#13
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Thank you for your help in getting my jeep up and running again. It
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
was greatly appreciated.
Mike Romain wrote:
> One common failure is the charcoal canister. When it fails totally, the
> idle will surge which will make the EGR go in and out or just not want
> to work and a pile of oil gets puked into the air filter imitating a
> blown engine...
>
> To test this, you follow the PCV line from the front of the valve cover
> to the back of the carb. At the back you will find a t fitting or a
> solenoid thing with another line coming off it. This other line goes
> way down behind the fender to the top of the charcoal canister. At idle
> pinch this line closed. If the idle changes, the canister purge valve
> is dead.
>
> You can take this line off the canister and plug it at the carb
> 'temporarily' to set the carb up right. You will need this canister
> plugged back in to avoid a lot of gas fumes because the canister is the
> vent for the gas tank and float bowls.
>
> 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)
>
> Jacob_T wrote:
> >
> > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > had to get a new engine for it, and I thought the mechanic could tune
> > the carb so it finally idles correctly. He told me though that he
> > doesn't understand the electric feedback carburetor systemt and to try
> > someone else. So here is what it does.
> >
> > It won't idle at all now, and the idle screw is turned almost all the
> > way in, When it did idle it keeps sputtering after i turn it off. It
> > idles fine while choked when it is cold, but when the choke goes off
> > and it warms up, it can't keep running. I was reading on others and
> > they mentioned egr valve, but then again I don't know to much about the
> > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > just open and stay open or close and stay close, is this how it is
> > supposed to work or is it supposed to open and close as necessary.
> > Hopefully one of you Jeep lovers out there can help me out.
> >
> > Jacob
11-14-2006, 09:39 PM
#14
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Change your fuel filter, attached to the front right frame rail.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
11-14-2006, 09:39 PM
#15
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Change your fuel filter, attached to the front right frame rail.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
11-14-2006, 09:39 PM
#16
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Change your fuel filter, attached to the front right frame rail.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
11-14-2006, 09:48 PM
#17
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
left
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
11-14-2006, 09:48 PM
#18
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
left
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
11-14-2006, 09:48 PM
#19
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
left
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
> Change your fuel filter, attached to the front right frame rail.
> God Bless America, Bill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> Jacob_T wrote:
> >
> > Checking the idle tubes turned out to be fruitful as they were nearly
> > completely clogged. Thank you for you recomendation.
11-15-2006, 09:44 AM
#20
Guest
Posts: n/a
Re: Rough Idle on 1990 Jeep Wrangler
Just a FYI for you. The tube that runs from the gas filter and loops
down to the carb has a tendency to get junk in it from gas evaporating
when it sits. This junk is after the filter and can easily get back
into the idle tubes.
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)
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
>
> Steve Foley wrote:
> > www.off-road.com/jeep/tech/engine/carter.html
> >
> >
> > "Jacob_T" <jacob.thaler@gmail.com> wrote in message
> > news:1163443709.939734.295070@k70g2000cwa.googlegr oups.com...
> > > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > > had to get a new engine for it, and I thought the mechanic could tune
> > > the carb so it finally idles correctly. He told me though that he
> > > doesn't understand the electric feedback carburetor systemt and to try
> > > someone else. So here is what it does.
> > >
> > > It won't idle at all now, and the idle screw is turned almost all the
> > > way in, When it did idle it keeps sputtering after i turn it off. It
> > > idles fine while choked when it is cold, but when the choke goes off
> > > and it warms up, it can't keep running. I was reading on others and
> > > they mentioned egr valve, but then again I don't know to much about the
> > > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > > just open and stay open or close and stay close, is this how it is
> > > supposed to work or is it supposed to open and close as necessary.
> > > Hopefully one of you Jeep lovers out there can help me out.
> > >
> > > Jacob
> > >
down to the carb has a tendency to get junk in it from gas evaporating
when it sits. This junk is after the filter and can easily get back
into the idle tubes.
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)
Jacob_T wrote:
>
> Checking the idle tubes turned out to be fruitful as they were nearly
> completely clogged. Thank you for you recomendation.
>
> Steve Foley wrote:
> > www.off-road.com/jeep/tech/engine/carter.html
> >
> >
> > "Jacob_T" <jacob.thaler@gmail.com> wrote in message
> > news:1163443709.939734.295070@k70g2000cwa.googlegr oups.com...
> > > I've had my 1990 Jeep Wrangler for about 5 years. For a while now
> > > though it has had trouble keeping a steady idle. Labor Day weekend, I
> > > had to get a new engine for it, and I thought the mechanic could tune
> > > the carb so it finally idles correctly. He told me though that he
> > > doesn't understand the electric feedback carburetor systemt and to try
> > > someone else. So here is what it does.
> > >
> > > It won't idle at all now, and the idle screw is turned almost all the
> > > way in, When it did idle it keeps sputtering after i turn it off. It
> > > idles fine while choked when it is cold, but when the choke goes off
> > > and it warms up, it can't keep running. I was reading on others and
> > > they mentioned egr valve, but then again I don't know to much about the
> > > egr valve. When the jeep runs the egr pulsates in and out and doesn't
> > > just open and stay open or close and stay close, is this how it is
> > > supposed to work or is it supposed to open and close as necessary.
> > > Hopefully one of you Jeep lovers out there can help me out.
> > >
> > > Jacob
> > >