Sudden ignition prob. Need immediate help - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Sudden ignition prob. Need immediate help

Save big with ExtremeTerrain.com's Top Spring Mods Sale!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed LineJeep Restorations, Mild to Wild! CCOR

Reply
Unread 08-24-2013, 05:41 PM   #1
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Sudden ignition prob. Need immediate help

Hey guys. Can someone chime in quickly. My dd and everything brand new suddenly developed a ignition problem. Drive the jeep to destination. Went to leave and nothing happened when I turned the key. Replaced the starter and same. Had battery jumped and it behaved like a bad battery. Slow at first little charge time ad fired up. Drive home shut it off and dead. Battery tested fine. Tried to jump solenoid nothing. Tried to jump wires to positive battery term nothing. Checked fuse box all good. I need to go to work in the morning so I'm dying over ere

__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 05:45 PM   #2
hp_lovecraft
Registered User
1981 CJ5 
 
Join Date: Sep 2009
Location: Maine
Posts: 925
What does the voltage meter show when it was running? maybe the alternator is not charging the battery? You have all the typical symptoms of a failing alternator. Most autoparts stores can test your alternator, and they are pretty cheap to replace since AMC used "off the shelf" items.

A short term solution might be to park on a hill. I had a failing alternator years ago... but push starting a CJ is way harder then a small compact.
hp_lovecraft is offline   Reply With Quote
Unread 08-24-2013, 05:50 PM   #3
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
I don't have a volt meter. I thought alt too but battery tested full strength after the home trip at AZ. When I turn to run position no power at coil. Doesn't make sense that started with a jump and ran if there was ign wiring prob. Plus I haven't changed anything and its been working fine
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 06:04 PM   #4
shadoow
Registered User
1985 CJ7 
 
Join Date: Nov 2006
Location: Granbury, Texas
Posts: 445
because you were able to jump start it i would suspect the battery, but you said it tested fine. What tests were done??
Also, did you battery and ground connections to be clean and tight? Years ago a friend of mine and I pulled into a gas station and when we went to leave there was no response when the key was turned. Cleaned and reseated the battery cable connections and all was fine.
Is there another battery around you could put in just to see if the problem is still there???
shadoow is offline   Reply With Quote
Unread 08-24-2013, 06:05 PM   #5
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Battery tested good at AZ. On the machine. CCA an load. Cleaned terminals for giggles anyway last night.
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 06:43 PM   #6
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Just tried a new solenoid. Still absolutely nothing. No power to coil. Help!!!!
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 07:01 PM   #7
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 5,792
Wonkie ignition switch.
86cj74.2L is offline   Reply With Quote
Unread 08-24-2013, 07:08 PM   #8
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Would it have jump started yesterday with a bad ignition switch? With no power to coil in on position, and all connections checked, I guess it's either the switch or the msd right?
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 07:14 PM   #9
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
I also get light on the circuit tester on the starter pole on the solenoid when the key is turned to start. But still nothing at positive terminal of coil. Is that the msd by elimination? I sure friggin hope not. Plus how would it have driven home if the msd wasn't firing the cylinders? I am completely confused!
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 07:14 PM   #10
Mace350
Registered User
1989 YJ Wrangler 
 
Join Date: Aug 2010
Location: Eastern Shore, Maryland
Posts: 104
Clean your negative battery cable where it bolts to the Jeep
Mace350 is offline   Reply With Quote
Unread 08-24-2013, 07:17 PM   #11
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Please guys. It is a brand new rebuilt engine. It doesn't get any cleaner. And I have said I have good power to everything else just not the coil. I appreciate any an all help but this is a desperate situation and that has been suggested and reported done already.
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 08:36 PM   #12
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Any electric gurus? Streak, Hammer?
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 08:59 PM   #13
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 3,826
Mount you batteries' main ground to the top mounting bolt of your starter.
You may be loos'n volts via the alt.
Disconnect the alt at night, and see if the battery will hold charge.
Next night with a fully charged battery. Disco the POS(+)battery cable. Does it hold charge?
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is online now   Reply With Quote
Unread 08-24-2013, 09:15 PM   #14
vinnyabs
Registered User
1983 CJ7 
 
Join Date: Nov 2011
Location: tampa, fl
Posts: 513
Thanks LG. I'll give it a try. So stressed and confused at this point…
__________________
Earning an engineering degree one CJ7 hiccup at a time
vinnyabs is offline   Reply With Quote
Unread 08-24-2013, 09:33 PM   #15
86cj74.2L
Web Wheeler
 
86cj74.2L's Avatar
2004 WJ 
 
Join Date: Jul 2006
Location: Stouchsburg, PA
Posts: 5,792
Do you have a neutral safety switch on trans or a clutch depressed switch.

If you have no power to the coil in the on position you need to see if power is going to the switch. A test light is easy and cheep.

If you have no power to the switch its time to look at the bulkhead connector. And or the battery's cabling etc.

a crappy ground or grounds will look like all sorts of things its not.
86cj74.2L is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.