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Unread 07-02-2011, 09:12 AM   #1
Registered User
1994 LJ Wrangler 
Join Date: Jul 2011
Location: Carolina Beach, NC
Posts: 1
Newbie Need help!


Help! I took my 1994 5 speed Wrangler to the beach and she quit. Earlier this week I got a new starter and everything working fine. Drove on the beach no problem. After dark went to get gas, to the ABC store, and 2 other stops it was about 80 degrees. I was leavin' the Food Lion and it just quit, no bad noise just stopped. It would turn over but would not catch. Could not push start either. Several people offered advice: a bad autoshut off relay, one guy pulled the coil wire no spark, sprayed starter fluid in air intake . . . nothing. Starter is spinning the engine over but won't run. Another person suggested the crankshaft position sensor ???
I have limited funds so I have to hit this is first time. Anyone that can offer any suggestions please HELP!!!

Thank You! in advance. :-)

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Unread 07-02-2011, 09:31 AM   #2
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1991 YJ Wrangler 
Join Date: Nov 2008
Location: Elizabethtown, Ky.
Posts: 3,064
Check for codes.

MJM Powder Coating
Elizabethtown Ky.
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Unread 07-02-2011, 10:07 AM   #3
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YJ Wrangler 
Join Date: Oct 2010
Location: Hamilton, Ontario
Posts: 742
Assuming the guy that said no spark was correct, that would be your issue. Why no spark, you need to diagnose. Crank Position sensor going bad would cause a no-spark situation. So would a bad coil.

You can check the fuel pressure easily enough via the schrader valve behind the throttle body.
You can have a buddy turn the key from OFF to RUN (not crank), and put your finger on the Auto Shut-down Relay (ASD). In run, it should click on for about 2 seconds, then click off. In crank it should click on and stay on but you won't be able to tell because the engine is rocking. FYI, Auto Shutdown supplies power to the fuel pump and the coil.
It's not easy to test the coil or crank sensor. You need special tools, like noid lights and digital multimeters. Do you have these tools?
'91 Frankenheep YJ. 4.0, 4" BDS, Richmond 8.8, Titan 12k, 35" KM2's, rust.
'88 YJ, 4.2/4.0 head, +4" & shackles, BFG 33's (sold)
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Unread 07-02-2011, 10:45 AM   #4
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1994 YJ Wrangler 
Join Date: Feb 2007
Location: florida
Posts: 3,875
A easy test for the CPS is to disconnect the wire for about a minute then reconnect it. If she starts the CPS is bad.
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Unread 07-02-2011, 01:17 PM   #5
1992 YJ Wrangler 
Join Date: Aug 2008
Location: North Central Wa
Posts: 303
Mine did something pretty much like what you are describing when I first bought it. It turned out to be some slight corrosion in the PDC by the battery. So I pulled all the fuses and relays one by one and cleaned them up with a small brass bristled brush, and put them back in, and have had no issues since. Also cleaned the battery posts as well. Cheap fix. Hope it helps.
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