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Unread 08-24-2013, 11:56 AM   #1
Swietzer94
Registered User
1994 YJ Wrangler 
 
Join Date: Jul 2013
Location: Anacortes, WA
Posts: 12
Yj won't start

I've got a 1994 yj 4.0 and this morning it would not start. The engine would just crank over and over. I've had this problem before and discovered it was my throttle positioning sensor. So that's been recently replaced. After I had tryed to start the engine a couple of times I went under the hood and checked all my connections such as plug wires the plugs going to my intake and any other plugs that looked important. After that I went to crank it over and it caught and started running. Although to me it sounded like it was running just a little bit rough. I then turned it off and tryed to start it again to make sure it was fixed and it just cranked and cranked over again. Anyone have any ideas?

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Unread 08-24-2013, 09:58 PM   #2
mzimerf
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1990 YJ Wrangler 
 
Join Date: Jan 2011
Location: schaumburg, IL
Posts: 188
A buddy just had that exact thing happen with his and it was his ecu.code showed the tps but a shop checked it and the ECM burnt out. Not saying that's what happened with yours but somewhere to start.
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Unread 08-24-2013, 10:10 PM   #3
Que89YJ
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1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,400
Check your fault codes. You can do it by cycling the key. On my cell so I can't post a link but you can find how by searching the forum. Also crank position sensor. Check to see if you are losing fuel or spark.
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Unread 08-24-2013, 10:35 PM   #4
Swietzer94
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1994 YJ Wrangler 
 
Join Date: Jul 2013
Location: Anacortes, WA
Posts: 12
While I was checking for spark it finally caught and started running. Although right before it started I heard the fuel pump turn on. And I'm not sure I was hearing that before. Although I did check the fuel rail before it finally started running again and there was defiantly fuel in it..
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Unread 08-25-2013, 12:18 AM   #5
Que89YJ
Web Wheeler
1989 YJ Wrangler 
 
Join Date: Apr 2008
Location: Detroit, Michigan
Posts: 15,400
Check it when it's not starting the next time.Check the codes.
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Unread 08-25-2013, 12:30 AM   #6
Luuca
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2005 LJ Wrangler 
 
Join Date: Apr 2012
Location: Corona, CA
Posts: 2,547
Quote:
Originally Posted by Que89YJ View Post
Check your fault codes. You can do it by cycling the key. On my cell so I can't post a link but you can find how by searching the forum. Also crank position sensor. Check to see if you are losing fuel or spark.
It's good to have Que back in the line up.

Here's the code link:

http://www.jeepforum.com/forum/f12/h...codes-1257145/
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