99trooper

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?

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

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?

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

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?

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

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?

L.W.(=?iso-8859-1?Q?=DFill?=) Hughes III

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?

99trooper

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

99trooper

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

99trooper

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

99trooper

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

Mike Romain

There is also a regulator on the fuel rail usually with a check valve
for the return line so you would need to first check the pressure bleed
off, then isolate which way it is going down if it is indeed the
trouble. Bill's test will tell you for sure if that is the problem. It
made no difference in our 4.0.

Our Cherokee got noticeably faster starting in the mornings when I
replaced the ratty ground strap between the engine and the firewall. A
quick test for that is to run a booster cable from the battery negative
to the body and see if it starts right up after that.

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

99trooper wrote:
>
> 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