jeep wont start

jeepnleo · 08-16-2009, 09:08 PM

So my jeep won't start. The starter is going the battery seems fine.

So if I can't get this thing going by the 30th. I may have to drive my truck up and sit shotgun if there is any seats open.

Any suggestion?

BuckB91XJ · 08-16-2009, 09:10 PM

Leo, So does it crank but not start or does it not even crank? Do you know if you're getting spark at the plugs and if you have good fuel pressure?

tampaviking · 08-16-2009, 10:59 PM

CPS is usually a good place to check.http://www.lunghd.com/Tech_Articles/...iagnostics.htm

jeepnleo · 08-17-2009, 12:18 AM

No it doesn't even turn over as far as I can tell.

I hear the starter going and going but not much more.

The weeks or so before this happen I noticed it would be harder to start. Take a minute or two sometimes. Once it died while I let it warm up.

But now it won't start. It ran fan even on the days it was hard to start.

I am not sure how I would check fuel pressure.

As far as spark I guess I can pull a plug and see if it sparks.

I look into the cps thing also.

jeepnleo · 08-17-2009, 12:18 AM

No it doesn't even turn over as far as I can tell.

I hear the starter going and going but not much more.

The weeks or so before this happen I noticed it would be harder to start. Take a minute or two sometimes. Once it died while I let it warm up.

But now it won't start. It ran fan even on the days it was hard to start.

I am not sure how I would check fuel pressure.

As far as spark I guess I can pull a plug and see if it sparks.

I look into the cps thing also.

jeepnleo · 08-17-2009, 12:41 AM

I looked into the cps issue on different sights and that really looks like the issue.

I will try replacing that.

jeepnleo · 08-17-2009, 12:41 AM

I looked into the cps issue on different sights and that really looks like the issue.

I will try replacing that.

tampaviking · 08-17-2009, 08:59 PM

Before you buy one try the connector, unplug it and clean it. then check it for condition and security on the bell housing. Mine would wiggle loose and my rig would just shut off driving down the road. If you do get a new one I would suggest doing this mod.
http://www.floridajeepers.net/viewto...c2ed2f76dca611

jeepnleo · 08-18-2009, 12:59 AM

I checked the connection and it looks good. Tried to wiggle everything.

All seems well so I got the sensor I will modify the sensor and install soon.

jeepnleo · 08-18-2009, 12:59 AM

I checked the connection and it looks good. Tried to wiggle everything.

All seems well so I got the sensor I will modify the sensor and install soon.

1987XJ · 08-25-2009, 12:48 PM

if its not even turning over then its not the cps, sounds like a starter problem

jeepnleo · 08-27-2009, 12:42 AM

I got it to start yesterday but died again. I am sure its the CPS but If that doesn't work I will try the starter.

jeepnleo · 08-30-2009, 08:51 PM

I finally got a chance to get to work on the CPS got one bolt out took 45 minutes. Still one more bolt to go. This really sucks.

jeepnleo · 09-04-2009, 02:23 PM

ok so i took the old sensor off. then i did the mod to the new one. i got all put together.

it was still a little hard to start but it started and much sooner.

then i took it for a test drive. it was nice to drive it again.

now for the bad and for the help needed again.

so if i give it throttle it feels like the engne is bucking. not sure if that is knocking?

when i drive it i cant go faster then 15mph. and if a hills envolved i am screwed. i try to give it throttle and it starts to buck and pop.

what is wrong? i this sensor bad? is it possible that it is not seated correctly since it now slided on.

is something else wrong now?

help help help

1987XJ · 09-04-2009, 08:21 PM

what did you mod on it

08-16-2009, 09:08 PM	#1
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	jeep wont start So my jeep won't start. The starter is going the battery seems fine. So if I can't get this thing going by the 30th. I may have to drive my truck up and sit shotgun if there is any seats open. Any suggestion? __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-16-2009, 09:10 PM	#2
BuckB91XJ ::CF Moderator:: Join Date: Nov 2008 Location: Oak Harbor, WA. Posts: 3,880 My Photos 1991 Cherokee Year: 1991 Model: Cherokee Engine: 4.0 liter H.O. I-6, HB Cold Air Intake, 2.5 FM Exhaust, 3 Core Radiator Transmission: AW-4 Auto Tranny HB 1st gear lock Transfer Case: NP 231 Front Axle: Dana 30 4.56 gears, Aussie Locker, Rusty's SB Quick Discos, ZJ Tie Rod, 95+ axle shafts Rear Axle: Dana 44 4.56 gears, Aussie Locker Tires: 33x12.50x15 Maxxis Big Horns Lift Specifications: 4.5" Rusty's Kit, 1.5" Daystar Spacer/Shackle Rough Country X-Flex Upper and Lower Control Arms Misc Accessories: ORF Bumper, XRC8000 winch, JCR Rock Sliders, Rear tire carrier and skid plates from doner XJ	Leo, So does it crank but not start or does it not even crank? Do you know if you're getting spark at the plugs and if you have good fuel pressure? __________________ Brian Buchanan - US Navy CPO 91 XJ 87 XJ 06 KJ

08-16-2009, 10:59 PM	#3
tampaviking Senior Member Join Date: Sep 2008 Location: Ft. Lewis, Wa Posts: 778 My Photos 1987 Cherokee Year: 1987 Model: Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: 242 Front Axle: dana 30 Rear Axle: dana 44 Tires: 35" BFG Muds Lift Specifications: 5" Misc Accessories: fixed lower control arms, HD trackbar and mount	CPS is usually a good place to check.http://www.lunghd.com/Tech_Articles/...iagnostics.htm __________________ 87 30/44 with 4.88 gears, Aussie, Drop brackets too many junkyard upgrades

08-17-2009, 12:18 AM	#4
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	No it doesn't even turn over as far as I can tell. I hear the starter going and going but not much more. The weeks or so before this happen I noticed it would be harder to start. Take a minute or two sometimes. Once it died while I let it warm up. But now it won't start. It ran fan even on the days it was hard to start. I am not sure how I would check fuel pressure. As far as spark I guess I can pull a plug and see if it sparks. I look into the cps thing also. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-17-2009, 12:18 AM	#5
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	No it doesn't even turn over as far as I can tell. I hear the starter going and going but not much more. The weeks or so before this happen I noticed it would be harder to start. Take a minute or two sometimes. Once it died while I let it warm up. But now it won't start. It ran fan even on the days it was hard to start. I am not sure how I would check fuel pressure. As far as spark I guess I can pull a plug and see if it sparks. I look into the cps thing also. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-17-2009, 12:41 AM	#6
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	I looked into the cps issue on different sights and that really looks like the issue. I will try replacing that. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-17-2009, 08:59 PM	#8
tampaviking Senior Member Join Date: Sep 2008 Location: Ft. Lewis, Wa Posts: 778 My Photos 1987 Cherokee Year: 1987 Model: Cherokee Engine: 4.0 Transmission: AW4 Transfer Case: 242 Front Axle: dana 30 Rear Axle: dana 44 Tires: 35" BFG Muds Lift Specifications: 5" Misc Accessories: fixed lower control arms, HD trackbar and mount	Before you buy one try the connector, unplug it and clean it. then check it for condition and security on the bell housing. Mine would wiggle loose and my rig would just shut off driving down the road. If you do get a new one I would suggest doing this mod. http://www.floridajeepers.net/viewto...c2ed2f76dca611 __________________ 87 30/44 with 4.88 gears, Aussie, Drop brackets too many junkyard upgrades

08-18-2009, 12:59 AM	#9
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	I checked the connection and it looks good. Tried to wiggle everything. All seems well so I got the sensor I will modify the sensor and install soon. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-25-2009, 12:48 PM	#11
1987XJ Member Join Date: Nov 2008 Location: Oak Harbor, Wa Posts: 208 My Photos 1987 Cherokee Year: 1987 Model: Cherokee Engine: 4.0 Renix Transmission: aw4 Transfer Case: np231 Front Axle: Dana 30 with 4.56 yukon gears Rear Axle: Chrysler 8.25 with 4.56 yukon gears Tires: 33x12.50x15 Maxxis Bighorns Lift Specifications: 6.5 inch Rough Country Misc Accessories: CB, JCR rock sliders	if its not even turning over then its not the cps, sounds like a starter problem

08-27-2009, 12:42 AM	#12
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	I got it to start yesterday but died again. I am sure its the CPS but If that doesn't work I will try the starter. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

08-30-2009, 08:51 PM	#13
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	I finally got a chance to get to work on the CPS got one bolt out took 45 minutes. Still one more bolt to go. This really sucks. __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

09-04-2009, 02:23 PM	#14
jeepnleo Seasoned Member Join Date: Feb 2009 Posts: 356 My Photos 1990 Cherokee Year: 1990 Model: Cherokee Transmission: 4.0l Transfer Case: np231 Front Axle: d30 Rear Axle: d35 Tires: stock Lift Specifications: stock Misc Accessories: custom intake	ok so i took the old sensor off. then i did the mod to the new one. i got all put together. it was still a little hard to start but it started and much sooner. then i took it for a test drive. it was nice to drive it again. now for the bad and for the help needed again. so if i give it throttle it feels like the engne is bucking. not sure if that is knocking? when i drive it i cant go faster then 15mph. and if a hills envolved i am screwed. i try to give it throttle and it starts to buck and pop. what is wrong? i this sensor bad? is it possible that it is not seated correctly since it now slided on. is something else wrong now? help help help __________________ 1990 sport 4.0l d30 d35 np231 3inch lift(spacers and AAL maybe procomp,31x10.5 dunlop mud rovers,trimmed fenders, rough country rock sliders http://www.flickr.com/photos/onsightphotography/

09-04-2009, 08:21 PM	#15
1987XJ Member Join Date: Nov 2008 Location: Oak Harbor, Wa Posts: 208 My Photos 1987 Cherokee Year: 1987 Model: Cherokee Engine: 4.0 Renix Transmission: aw4 Transfer Case: np231 Front Axle: Dana 30 with 4.56 yukon gears Rear Axle: Chrysler 8.25 with 4.56 yukon gears Tires: 33x12.50x15 Maxxis Bighorns Lift Specifications: 6.5 inch Rough Country Misc Accessories: CB, JCR rock sliders	what did you mod on it

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