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Unread 07-16-2013, 02:09 PM   #1
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
just wont start.

Hey all,
I am having a very frustrating issue. I bought my jeep a few months ago and it started having a problem starting. I searched on here for like issues and found a few possible fixes.

So my issue is that when I turn the key it will not start. The battery tested fine and all the lights, a/v, etc come on. The starter works (replaced last month). The fuel filter and pump are good (tested 2 days ago). I have cleaned the IAC, the carb, and the fuel injecters. After i cleaned the fuel injecters it seemed to run fine. I drove it today around town running errands and when I went to get gas it did not start back up. I had to have it towed back to my place.

Also, my lights don't dim when I turn the key to start it up...

Any help would be much appreciated.

Thank you.

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Unread 07-16-2013, 02:17 PM   #2
chriskeenan
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1999 XJ Cherokee 
 
Join Date: Apr 2010
Location: Colton, Oregon
Posts: 2,236
NSS, neutral safety switch. Try starting it in neutral and wiggling the shifter while trying to start it. also Google "jeep NSS cleaning", they get full of junk and don't work, causes problems like you describe.
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Unread 07-16-2013, 02:37 PM   #3
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by chriskeenan View Post
NSS, neutral safety switch. Try starting it in neutral and wiggling the shifter while trying to start it. also Google "jeep NSS cleaning", they get full of junk and don't work, causes problems like you describe.
X2. Possibly one of the easiest tests to perform is to locate the NSS connector and bypass the switch, (be sure to have your electrical wiring diagram handy) by backprobing the connector with a paperclip, then try to turn it over. If it starts then you know for sure that the NSS is the issue.
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Quoted from eflightray on RCGroups.com;
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Unread 07-17-2013, 08:41 AM   #4
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
So, I tried today to just put it in nuetral to start it and it starts right up each time. It still does not start in Park. I do not have a wiring diagram for this vehicle yet so I have not been able to do the bypass check. I would say it is pretty safe to say that the NSS is the issue with that simple test I did.

Would it be a safe bet to just replace the NSS or should I try out more tests before proceeding?
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Unread 07-17-2013, 09:08 AM   #5
chriskeenan
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1999 XJ Cherokee 
 
Join Date: Apr 2010
Location: Colton, Oregon
Posts: 2,236
Quote:
Originally Posted by tboTERROR View Post
So, I tried today to just put it in nuetral to start it and it starts right up each time. It still does not start in Park. I do not have a wiring diagram for this vehicle yet so I have not been able to do the bypass check. I would say it is pretty safe to say that the NSS is the issue with that simple test I did.

Would it be a safe bet to just replace the NSS or should I try out more tests before proceeding?
Pretty sure that it's the issue. try cleaning it first, new NSS switches are expensive.
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Unread 07-17-2013, 01:00 PM   #6
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
If you do have the Jeep's AW4 Automatic transmission, then take a look at these articles from JP Magazine and from Cherokee-Jeep.com. They will tell you how to clean and service your NSS.

A foot note, I have transplanted a 1988 XJ AW4 into my 1988 YJ a couple years ago, and one of the issues that I had was that my Jeep wasn't starting because the NSS was failing. I had made the decision to clean it before I replaced it. Fortunately for me a little cleaning service saved me a bunch of money over the cost of a new NSS. And to boot, it was so simple to work on.

http://www.jpmagazine.com/techarticl...safety_switch/

Here is another article from the Cherokee-Jeep.com website.

http://www.cherokee-jeep.com/1-2swremov.htm
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Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 07-18-2013, 09:54 AM   #7
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
I cannot get the NSS off. I have cut all zip ties, removed the mounting bolt, removed the nut, and I can't get it to slide off. I tried following a tutorial online where the guy uses the nut and a flat head to pry it off. When I tried that it started to strip the threads on the switch so I just went ahead and took the nut completely off.

Any ideas on how to remove it now?
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Unread 07-18-2013, 10:15 AM   #8
chriskeenan
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1999 XJ Cherokee 
 
Join Date: Apr 2010
Location: Colton, Oregon
Posts: 2,236
Quote:
Originally Posted by tboTERROR View Post
I cannot get the NSS off. I have cut all zip ties, removed the mounting bolt, removed the nut, and I can't get it to slide off. I tried following a tutorial online where the guy uses the nut and a flat head to pry it off. When I tried that it started to strip the threads on the switch so I just went ahead and took the nut completely off.

Any ideas on how to remove it now?
lots of penetrating oil. its not the easiest thing to remove, be careful not to break the plastic half of the switch.
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Unread 07-18-2013, 10:46 AM   #9
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by tboTERROR View Post
I cannot get the NSS off. I have cut all zip ties, removed the mounting bolt, removed the nut, and I can't get it to slide off. I tried following a tutorial online where the guy uses the nut and a flat head to pry it off. When I tried that it started to strip the threads on the switch so I just went ahead and took the nut completely off.

Any ideas on how to remove it now?
Quote:
Originally Posted by chriskeenan View Post
lots of penetrating oil. its not the easiest thing to remove, be careful not to break the plastic half of the switch.
X2. Soak it down with a good penetrating oil, PB Blaster is one of the best that there is. Let it set for some time, wipe it off, then spray it down with some electrical cleaner, this will break up any residue that is till trapped in the pinch areas, then check for rust on the shaft. If rust is present use a fine grit sand paper or emery cloth to sand it off.
__________________
Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."

Last edited by remmons; 07-18-2013 at 10:49 AM.. Reason: Added pertinent info.
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Unread 07-18-2013, 10:50 AM   #10
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
would I be able to use WD-40 or should I buy a specific lubricant for this job?
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Unread 07-18-2013, 11:45 AM   #11
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Quote:
Originally Posted by tboTERROR View Post
would I be able to use WD-40 or should I buy a specific lubricant for this job?
Any penetrating lubricant will work, I am just partial to PB Blaster for my more difficult situations, such as a stuck or frozen bolt or nut. I do have WD-40 as well as liquid wrench, but I favor the PB the most.
__________________
Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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Unread 07-19-2013, 07:30 PM   #12
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
Well I have been working for two days to get this thing off with pb blaster. Still not moving. I bought a new nut to thread on and use it to pry with... I broke two screwdrivers. Granted they were not very large ones, but still... Are there any techniques that I haven't tried?
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Unread 08-14-2013, 01:43 PM   #13
tboTERROR
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1999 XJ Cherokee 
 
Join Date: Jul 2013
Location: la grange, nc
Posts: 12
This issue was solved after I got everything off, cleaned, and re-installed
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Unread 08-14-2013, 02:45 PM   #14
remmons
Some assembly required.
2002 KJ Liberty 
 
Join Date: Mar 2010
Location: Vernal, Utah
Posts: 1,832
Good to hear that you got it running!
__________________
Robert.

Quoted from eflightray on RCGroups.com;
"Make something 'fool-proof', and nature will just produce better fools."
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