Cold starting - Page 2 - Jeep Cherokee Forum
Jeep Cherokee Forum


OEM XJ Cherokee Technical. All XJ Non-modified/stock questions go here
XJ (84-01)
All OEM related XJ specific tech. Examples, no start, general maintenance or anything that's stock.
Sponsored by:
Sponsored by:

Cold starting

Reply
 
 
 
Thread Tools Search this Thread
Old 11-14-2017, 12:31 PM   #16
CF Veteran
 
Bugout4x4's Avatar
 
Join Date: May 2015
Location: Arizona
Posts: 1,373

View Bugout4x4's Photo Album My Photos
Year: 97
Model: Cherokee
Engine: 4.0
Default

OK dug around this morning and it raised yet another question. Are you getting smoke from the exhaust when you first try to crank it? And if so what color is it? White, blue, black?
Bugout4x4 is offline   Reply With Quote
Old 11-14-2017, 02:00 PM   #17
Newbie
Thread Starter
 
Join Date: Nov 2017
Posts: 9

View Mipar28's Photo Album My Photos
Model: Cherokee(SJ)
Default

No smoke, on cranking, little bit of white smoke once it starts.
Mipar28 is offline   Reply With Quote
Old 11-14-2017, 04:38 PM   #18
CF Veteran
 
Bugout4x4's Avatar
 
Join Date: May 2015
Location: Arizona
Posts: 1,373

View Bugout4x4's Photo Album My Photos
Year: 97
Model: Cherokee
Engine: 4.0
Default

Quote:
Originally Posted by Mipar28 View Post
No smoke, on cranking, little bit of white smoke once it starts.
Ah! now I finally asked the right question! I am almost sure you have a fuel delivery problem then. It might be sucking air somewhere and draining back towards the tank or a primary pump. This is a huge indicator that it is not getting enough fuel when you are trying to start it. It should smoke as soon as it starts to turn over and the whole time you are cranking it until it fires.

There is light at the end of the tunnel! lol

Now let me go find schematics of the fuel delivery system for possibilities.

We will lick this yet.
Bugout4x4 is offline   Reply With Quote
Old 11-14-2017, 05:32 PM   #19
Seasoned Member
 
Tbone289's Avatar
 
Join Date: Oct 2011
Location: SEMO
Posts: 463

View Tbone289's Photo Album My Photos
Year: 2000
Model: Cherokee(XJ)
Engine: 4.0 L6
Default

Bugout normally gives sound advice, but I don't recommend you lick it.
Tbone289 is offline   Reply With Quote
Old 11-14-2017, 05:58 PM   #20
CF Veteran
 
Bugout4x4's Avatar
 
Join Date: May 2015
Location: Arizona
Posts: 1,373

View Bugout4x4's Photo Album My Photos
Year: 97
Model: Cherokee
Engine: 4.0
Default

Quote:
Originally Posted by Tbone289 View Post
Bugout normally gives sound advice, but I don't recommend you lick it.
I agree! I stand corrected, I may have misguided him a bit there... lol
Bugout4x4 is offline   Reply With Quote
Old 11-15-2017, 01:05 PM   #21
CF Veteran
 
Bugout4x4's Avatar
 
Join Date: May 2015
Location: Arizona
Posts: 1,373

View Bugout4x4's Photo Album My Photos
Year: 97
Model: Cherokee
Engine: 4.0
Default

I am still trying to find a complete fuel system schematic on this. But here are a few things to address but keep in mind I am still in the dark with this system and what exact components it has.

Did this first start to have problems after anything on the fuel system was replaced or serviced?

But here is a list of possibles and I am curious if you have already played with any of them?

Does it have a primary fuel pump? I'm trying to chase this down just to be sure, it should have... But once the fuel is primed up to the pump and injectors a diesel will run fine without the primary pump. So it could just be a Primary pump problem.

I did see this is a common rail system... So it more than likely has a pressure management valve and a return line? This could be bad and not maintaining pressure and fuel. Checking into this also.

And finally, when was the last time the filter (or filters?) has/have been serviced? I apologize for the delays but like you... I am also having a heck of a time finding what I need with this model and system but I ain't giving up yet.
Bugout4x4 is offline   Reply With Quote
Old 11-15-2017, 02:43 PM   #22
Newbie
Thread Starter
 
Join Date: Nov 2017
Posts: 9

View Mipar28's Photo Album My Photos
Model: Cherokee(SJ)
Default

I’ll give you a bit more background, the problem first manifested itself last winter, we persevered, because it only didn’t start when the temperature dropped below freezing, all this summer it was fine, when we had it serviced in the summer we had the crankshaft sensor changed, it started as soon as it was cranked, right up until last week, when the temperature dropped below freezing. I gave it a squirt of starter fluid, and it fired up straight away. The problem seems to only rear it’s head when the temperature drops below freezing. As soon the weather improves it’s back to starting straight away. Baffled
Mipar28 is offline   Reply With Quote
Old 11-16-2017, 06:07 AM   #23
CF Veteran
 
Bugout4x4's Avatar
 
Join Date: May 2015
Location: Arizona
Posts: 1,373

View Bugout4x4's Photo Album My Photos
Year: 97
Model: Cherokee
Engine: 4.0
Default

Quote:
Originally Posted by Mipar28 View Post
I’ll give you a bit more background, the problem first manifested itself last winter, we persevered, because it only didn’t start when the temperature dropped below freezing, all this summer it was fine, when we had it serviced in the summer we had the crankshaft sensor changed, it started as soon as it was cranked, right up until last week, when the temperature dropped below freezing. I gave it a squirt of starter fluid, and it fired up straight away. The problem seems to only rear it’s head when the temperature drops below freezing. As soon the weather improves it’s back to starting straight away. Baffled
Actually this is kind of normal for diesels because of the "cloud point" of diesel fuel. The cloud point and thickening starts at +1 degree Celsius and slows the flow through filters and any restrictive porting in the system like injectors, getting worse the colder it gets until it finally gels solid at -8.1 degrees Celsius. When it gets down to freezing sometimes you have to start using winter fuel to help with this.

But things get even much worse if you have restricted filters or water in the filters or for some reason a weak delivery system. Which is what I suspect on yours. I would go have the filter or filters changed on this thing. It is very easy to get diesel with water in it or even fuel with algae in it. Both of which will clog filters.

At any rate, the lack of any smoke when you first try to start it tells me you are not getting fuel for some reason. Then right after you get a little smoke it fires up? That was when the fuel pressure finally got to the injectors for it to start. if it were mine I would get these fuel filter/filters serviced and then see if there are any further problems and go from there.

Actually I would do this at least just before winter every year just for peace of mind knowing that colder temps are coming.

Edit: Sorry I reread your reply. you did have it serviced. But could there be more than one filter and they changed the secondary but didn't change the primary in the system? (this is a very common goof up).The next issue that could cause this of course is a pump. If you can afford it I would go have the integrity of the fuel delivery system tested or download a manual at one of those online sources and test it yourself. We are down to that point with this. I would have to come physically look at the system and test it to be of much more help here. It's hands on time on your end but I am almost 100% sure it is a fuel delivery issue. Be sure and tell them that "it is slow to get fuel during cold starts". This is important because once it is started and running everything might check out fine when they check it. They need to know about this so they can look for additional problems.

Last edited by Bugout4x4; 11-16-2017 at 06:36 AM.
Bugout4x4 is offline   Reply With Quote
Old 11-16-2017, 02:25 PM   #24
Senior Member
 
BillyBoy's Avatar
 
Join Date: Aug 2009
Location: Detroit, Michigan
Posts: 860

View BillyBoy's Photo Album My Photos
Year: 1998
Model: Cherokee
Engine: 4.0
Default

New battery. See if it starts with a jump. When cold. Takes more amps.
BillyBoy is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Small settlement check = JEEP PARTS. Help.... IStoleIt OEM Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here! 6 10-08-2016 10:59 PM
Jeep Cherokee 4.7 rough idle stalling code p0500 Chrisstyb OEM XJ Cherokee Technical. All XJ Non-modified/stock questions go here 1 09-27-2016 07:46 AM
99 XJ A/C blower intermittently working shotseven OEM XJ Cherokee Technical. All XJ Non-modified/stock questions go here 0 09-06-2015 04:06 PM
Hard question for you Jeep Heads? Funky Fresh OEM XJ Cherokee Technical. All XJ Non-modified/stock questions go here 8 02-06-2008 06:47 PM
My Cherokee is CHRISTINE - Please help! flowerpower OEM XJ Cherokee Technical. All XJ Non-modified/stock questions go here 2 12-19-2007 09:34 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 05:29 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description: