97 JGC hard starts

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CarGuru > Jeep Willys > 97 JGC hard starts 19 April 2005 04:14:05

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97 JGC hard starts
99trooper 14 April 2005 22:22:21
	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?
		Add comment


L . W . Hughes III 14 April 2005 23:17:39 [ permanent link ]
	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, Гџill O\|\|\|\|\|\|\|O mailto:LWHughes3rd@aol.com http://www.billhughes.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?
		Add comment


99trooper 15 April 2005 20:19:56 [ permanent link ]
	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
		Add comment


Mike Romain 15 April 2005 20:54:56 [ permanent link ]
	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
		Add comment


Denis Roy 18 April 2005 00:57:58 [ permanent link ]
	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. ("Яill") Hughes III" <billhughes@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, Яill O\|\|\|\|\|\|\|O> mailto:LWHughes3rd@aol.com http://www.billhughes.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?
		Add comment


L . W . Hughes III 18 April 2005 01:22:06 [ permanent link ]
	Hi Denis, It's a part in the fuel pump: http://www.billhughes.com/97TJfuelSystem.pdf God Bless America, Гџill O\|\|\|\|\|\|\|O mailto:LWHughes3rd@aol.com 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. ("Гџill") Hughes III" <billhughes@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, Гџill O\|\|\|\|\|\|\|O> > mailto:LWHughes3rd@aol.com http://www.billhughes.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?
		Add comment


Denis Roy 18 April 2005 01:38:21 [ permanent link ]
	ok, is it replaceable? "L.W. ("Яill") Hughes III" <billhughes@cox.net> wrote in message news:4262D37E.54A3A9E@cox.net...> Hi Denis,> It's a part in the fuel pump:> http://www.billhughes.com/97TJfuelSystem.pdf> God Bless America, Яill O\|\|\|\|\|\|\|O> mailto:LWHughes3rd@aol.com> 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. ("Яill") Hughes III" <billhughes@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, Яill O\|\|\|\|\|\|\|O>> > mailto:LWHughes3rd@aol.com http://www.billhughes.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?
		Add comment


L . W . Hughes III 18 April 2005 02:14:13 [ permanent link ]
	With the pump. God Bless America, Гџill O\|\|\|\|\|\|\|O mailto:LWHughes3rd@aol.com http://www.billhughes.com/ Denis Roy wrote:> ok, is it replaceable?
		Add comment


Denis Roy 18 April 2005 02:35:59 [ permanent link ]
	thanks, that's what i thought. had to ask "L.W. ("Яill") Hughes III" <billhughes@cox.net> wrote in message news:4262DFB5.ED9A77D6@cox.net...> With the pump.> God Bless America, Яill O\|\|\|\|\|\|\|O> mailto:LWHughes3rd@aol.com http://www.billhughes.com/> Denis Roy wrote:>> ok, is it replaceable?
		Add comment


L . W . Hughes III 18 April 2005 02:53:44 [ permanent link ]
	You may see how the ends are crimped, making it unserviceable: http://www.billhughes.com/fuelPump2.jpg God Bless America, Гџill O\|\|\|\|\|\|\|O mailto:LWHughes3rd@aol.com Denis Roy wrote:> thanks, that's what i thought. had to ask
		Add comment


Mic Canic 18 April 2005 05:05:26 [ permanent link ]
	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?
		Add comment


Mike Romain 18 April 2005 16:36:55 [ permanent link ]
	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.(Гџill) Hughes III" wrote:> Hi Denis,> It's a part in the fuel pump:> http://www.billhughes.com/97TJfuelSystem.pdf> God Bless America, Гџill O\|\|\|\|\|\|\|O> mailto:LWHughes3rd@aol.com> 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. ("Гџill") Hughes III" <billhughes@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, Гџill O\|\|\|\|\|\|\|O> > > mailto:LWHughes3rd@aol.com http://www.billhughes.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?
		Add comment


L . W . Hughes III 19 April 2005 00:06:35 [ permanent link ]
	Hi Mike, Yup, it's like that on every car I've seen, and Doug's ZJ: http://members.cox.net/wilsond/Fixes/fuel-rail-pressure-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, Гџill O\|\|\|\|\|\|\|O mailto:LWHughes3rd@aol.com http://www.billhughes.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
		Add comment


Lon 19 April 2005 04:14:05 [ permanent link ]
	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.
		Add comment

CarGuru > Jeep Willys > 97 JGC hard starts 19 April 2005 04:14:05

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97 JGC hard starts

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