Re: 97 JGC hard starts
 

fuel pump or crank sensor

99trooper wrote:

> Hello,
>
> I just replaced the plugs and distributer cap and rotor on a 97 Jeep Grand
> Cherokee because it was starting hard. It still starts hard after
> replacing those things. Usually I have to crank it over for a long time
> for it to start. Once it is running it runs and drives great. If the
> engine is already warm, it starts up fine, I only have trouble when it
> sits over night or for a while during the day...
>
> Any ideas of what else I could check?

Re: 97 JGC hard starts
 

Bill someone else posted about a valve in the fuel rail for the return
line that also can cause the same pressure bleed off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Denis,
> It's a part in the fuel pump:
> http://www.----------.com/97TJfuelSystem.pdf
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Denis Roy wrote:
> >
> > I have a Jeep TJ 97, and I got the same problem. I did the test as you
> > described below and the engine started fast, just as it did some time ago.
> > So, the question I have, were is this valve and is it easy to replace?
> >
> > "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> > news:425EC1D3.41DD4CD8@cox.net...
> > > You may have a bad check valve, allowing your fuel pressure to
> > > bleed off overnight. Next time you attempt to start it, instead of
> > > cranking the engine just turn on the ignition switch, and wait two
> > > seconds for the fuel pump to automatically turn off, switch the ignition
> > > off, and back on again, doing this for at least five more times and you
> > > should have gasoline back at the injectors.
> > > God Bless America, ßill O|||||||O
> > > mailto:-------------------- http://www.----------.com/
> > >
> > > 99trooper wrote:
> > >>
> > >> Hello,
> > >>
> > >> I just replaced the plugs and distributer cap and rotor on a 97 Jeep
> > >> Grand
> > >> Cherokee because it was starting hard. It still starts hard after
> > >> replacing those things. Usually I have to crank it over for a long time
> > >> for it to start. Once it is running it runs and drives great. If the
> > >> engine is already warm, it starts up fine, I only have trouble when it
> > >> sits over night or for a while during the day...
> > >>
> > >> Any ideas of what else I could check?

Re: 97 JGC hard starts
 

Bill someone else posted about a valve in the fuel rail for the return
line that also can cause the same pressure bleed off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Denis,
> It's a part in the fuel pump:
> http://www.----------.com/97TJfuelSystem.pdf
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Denis Roy wrote:
> >
> > I have a Jeep TJ 97, and I got the same problem. I did the test as you
> > described below and the engine started fast, just as it did some time ago.
> > So, the question I have, were is this valve and is it easy to replace?
> >
> > "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> > news:425EC1D3.41DD4CD8@cox.net...
> > > You may have a bad check valve, allowing your fuel pressure to
> > > bleed off overnight. Next time you attempt to start it, instead of
> > > cranking the engine just turn on the ignition switch, and wait two
> > > seconds for the fuel pump to automatically turn off, switch the ignition
> > > off, and back on again, doing this for at least five more times and you
> > > should have gasoline back at the injectors.
> > > God Bless America, ßill O|||||||O
> > > mailto:-------------------- http://www.----------.com/
> > >
> > > 99trooper wrote:
> > >>
> > >> Hello,
> > >>
> > >> I just replaced the plugs and distributer cap and rotor on a 97 Jeep
> > >> Grand
> > >> Cherokee because it was starting hard. It still starts hard after
> > >> replacing those things. Usually I have to crank it over for a long time
> > >> for it to start. Once it is running it runs and drives great. If the
> > >> engine is already warm, it starts up fine, I only have trouble when it
> > >> sits over night or for a while during the day...
> > >>
> > >> Any ideas of what else I could check?

Re: 97 JGC hard starts
 

Bill someone else posted about a valve in the fuel rail for the return
line that also can cause the same pressure bleed off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Denis,
> It's a part in the fuel pump:
> http://www.----------.com/97TJfuelSystem.pdf
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Denis Roy wrote:
> >
> > I have a Jeep TJ 97, and I got the same problem. I did the test as you
> > described below and the engine started fast, just as it did some time ago.
> > So, the question I have, were is this valve and is it easy to replace?
> >
> > "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> > news:425EC1D3.41DD4CD8@cox.net...
> > > You may have a bad check valve, allowing your fuel pressure to
> > > bleed off overnight. Next time you attempt to start it, instead of
> > > cranking the engine just turn on the ignition switch, and wait two
> > > seconds for the fuel pump to automatically turn off, switch the ignition
> > > off, and back on again, doing this for at least five more times and you
> > > should have gasoline back at the injectors.
> > > God Bless America, ßill O|||||||O
> > > mailto:-------------------- http://www.----------.com/
> > >
> > > 99trooper wrote:
> > >>
> > >> Hello,
> > >>
> > >> I just replaced the plugs and distributer cap and rotor on a 97 Jeep
> > >> Grand
> > >> Cherokee because it was starting hard. It still starts hard after
> > >> replacing those things. Usually I have to crank it over for a long time
> > >> for it to start. Once it is running it runs and drives great. If the
> > >> engine is already warm, it starts up fine, I only have trouble when it
> > >> sits over night or for a while during the day...
> > >>
> > >> Any ideas of what else I could check?

Re: 97 JGC hard starts
 

Bill someone else posted about a valve in the fuel rail for the return
line that also can cause the same pressure bleed off.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

"L.W.(ßill) ------ III" wrote:
>
> Hi Denis,
> It's a part in the fuel pump:
> http://www.----------.com/97TJfuelSystem.pdf
> God Bless America, ßill O|||||||O
> mailto:--------------------
>
> Denis Roy wrote:
> >
> > I have a Jeep TJ 97, and I got the same problem. I did the test as you
> > described below and the engine started fast, just as it did some time ago.
> > So, the question I have, were is this valve and is it easy to replace?
> >
> > "L.W. ("ßill") ------ III" <----------@cox.net> wrote in message
> > news:425EC1D3.41DD4CD8@cox.net...
> > > You may have a bad check valve, allowing your fuel pressure to
> > > bleed off overnight. Next time you attempt to start it, instead of
> > > cranking the engine just turn on the ignition switch, and wait two
> > > seconds for the fuel pump to automatically turn off, switch the ignition
> > > off, and back on again, doing this for at least five more times and you
> > > should have gasoline back at the injectors.
> > > God Bless America, ßill O|||||||O
> > > mailto:-------------------- http://www.----------.com/
> > >
> > > 99trooper wrote:
> > >>
> > >> Hello,
> > >>
> > >> I just replaced the plugs and distributer cap and rotor on a 97 Jeep
> > >> Grand
> > >> Cherokee because it was starting hard. It still starts hard after
> > >> replacing those things. Usually I have to crank it over for a long time
> > >> for it to start. Once it is running it runs and drives great. If the
> > >> engine is already warm, it starts up fine, I only have trouble when it
> > >> sits over night or for a while during the day...
> > >>
> > >> Any ideas of what else I could check?

Re: 97 JGC hard starts
 

Hi Mike,
Yup, it's like that on every car I've seen, and Doug's ZJ:
http://members.cox.net/wilsond/Fixes...-regulator.jpg
and It's only common sense to have the regulator at the fuel rail,
virtually eliminating any possible vapor lock and of course keeping the
fuel cooler at the engine for better mileage and horsepower, but then
this a nazi design.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill someone else posted about a valve in the fuel rail for the return
> line that also can cause the same pressure bleed off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

Re: 97 JGC hard starts
 

Hi Mike,
Yup, it's like that on every car I've seen, and Doug's ZJ:
http://members.cox.net/wilsond/Fixes...-regulator.jpg
and It's only common sense to have the regulator at the fuel rail,
virtually eliminating any possible vapor lock and of course keeping the
fuel cooler at the engine for better mileage and horsepower, but then
this a nazi design.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill someone else posted about a valve in the fuel rail for the return
> line that also can cause the same pressure bleed off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

Re: 97 JGC hard starts
 

Hi Mike,
Yup, it's like that on every car I've seen, and Doug's ZJ:
http://members.cox.net/wilsond/Fixes...-regulator.jpg
and It's only common sense to have the regulator at the fuel rail,
virtually eliminating any possible vapor lock and of course keeping the
fuel cooler at the engine for better mileage and horsepower, but then
this a nazi design.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill someone else posted about a valve in the fuel rail for the return
> line that also can cause the same pressure bleed off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

Re: 97 JGC hard starts
 

Hi Mike,
Yup, it's like that on every car I've seen, and Doug's ZJ:
http://members.cox.net/wilsond/Fixes...-regulator.jpg
and It's only common sense to have the regulator at the fuel rail,
virtually eliminating any possible vapor lock and of course keeping the
fuel cooler at the engine for better mileage and horsepower, but then
this a nazi design.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Bill someone else posted about a valve in the fuel rail for the return
> line that also can cause the same pressure bleed off.
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's

Re: 97 JGC hard starts
 

99trooper proclaimed:
> Thanks for the info...the checkvalve is part of the fuel pump right? Would
> I have to drop the tank to get the pump out?
>
> Thanks
>

Before you do that, try the simple test of turning on the key and wait
for several seconds before you try to start.

You might want to repeat the above a couple times, turn it on, count to
three, turn it off, then back on count to three and then try to start.

If that works, get your fuel pressure checked after a shutdown.