cherokee re start issue..

humpy · 11-11-2010, 11:33 AM

my lil bro has an 01 cherokee sport 4.0 auto trans...120k on it...it runs good but when you shut it off and leave it sit for more than 5 mins it cranks and cranks and cranks then finally starts and runs rough for bout 30 seconds smelling like its flooded then cleans up and runs good...did a full tune up on it including a new coil and still no fix...check fuel pressure when turn key on and its right at 49 pounds...and here is the kicker...when its under 30 degrees outside temp the problem goes away...:mad: :mad: any ideas?? leaky injector?? how the hell do ya test that if so?? any help would be AWESOME!! thanks in advance!!!

Flxratd · 11-11-2010, 01:08 PM

poss tw sensor or i had a fuel pressure reg go bad on my 95(not sure if the same setup) but it would dump fuel like crazy.

bgwyllys61 · 11-11-2010, 02:41 PM

could be something as simple as heat soak in the injectors, the engine bay gets extremely hot, and can sometimes cause issues with getting the injectors so hot that they wont function properly, or could be the pressure regulator, or a number of things, I know this doesnt help much, but its a start

Coppertop · 11-12-2010, 03:49 PM

Could be a TPS (Thottle Postion Sensor) while the engine is cranking,push the acel pedal down to see if it starts any quicker.

Nick

jfiscus · 11-17-2010, 05:43 PM

visiy/search naxja.org for more help.

Flxratd · 11-22-2010, 06:01 PM

did you find the solution or light it on fire ?

11-11-2010, 11:33 AM	#1
humpy Join Date: Sep 2008 Posts: 573	cherokee re start issue.. my lil bro has an 01 cherokee sport 4.0 auto trans...120k on it...it runs good but when you shut it off and leave it sit for more than 5 mins it cranks and cranks and cranks then finally starts and runs rough for bout 30 seconds smelling like its flooded then cleans up and runs good...did a full tune up on it including a new coil and still no fix...check fuel pressure when turn key on and its right at 49 pounds...and here is the kicker...when its under 30 degrees outside temp the problem goes away...:mad: :mad: any ideas?? leaky injector?? how the hell do ya test that if so?? any help would be AWESOME!! thanks in advance!!!

11-11-2010, 01:08 PM	#2
Flxratd Retired Join Date: May 2008 Location: Hamilton/Ross Posts: 645	poss tw sensor or i had a fuel pressure reg go bad on my 95(not sure if the same setup) but it would dump fuel like crazy. __________________ One of these days Zuk 2.0

11-12-2010, 03:49 PM	#4
Coppertop XJWHEELING Join Date: Nov 2007 Location: Colerain Township Posts: 837	Could be a TPS (Thottle Postion Sensor) while the engine is cranking,push the acel pedal down to see if it starts any quicker. Nick __________________ Just a 200 dollar cherokee that wouldn't start .. Ten years later same chrome grille ..

11-22-2010, 06:01 PM	#6
Flxratd Retired Join Date: May 2008 Location: Hamilton/Ross Posts: 645	did you find the solution or light it on fire ? __________________ One of these days Zuk 2.0

11-11-2010, 02:41 PM	#3
bgwyllys61 fullwidthxj Join Date: Feb 2008 Location: lex Posts: 15	could be something as simple as heat soak in the injectors, the engine bay gets extremely hot, and can sometimes cause issues with getting the injectors so hot that they wont function properly, or could be the pressure regulator, or a number of things, I know this doesnt help much, but its a start

11-17-2010, 05:43 PM	#5
jfiscus Terrain Stomper Join Date: Feb 2007 Location: Crittenden, KY Posts: 633	visiy/search naxja.org for more help.