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Unread 06-19-2013, 03:35 AM   #1
ThundROkieZJ98
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1998 ZJ 
 
Join Date: Feb 2012
Location: oklahoma city, oklahoma
Posts: 31
98 zj no start, no crank, no codes

vert recently replaced thermostat, it wasn't opening and coolant sprayed a lot in engine bay via failed rad cap. next evening driving along for 30 minutes and engine shuts down. I try to start while still rolling in neutral but won't catch.. it would crank and it seems there's a lot of fuel in the fuel rail but it wouldn't start. towed it to shop . now it won't give codes to my mechanic. he thinks the antifreeze from failed thermostat my have damaged the pc PCM he said there was some on the PCM does anyone have any ideas?

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Unread 06-19-2013, 03:37 AM   #2
ThundROkieZJ98
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my
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Unread 06-19-2013, 07:50 AM   #3
dellis
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1998 ZJ 
 
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I think you need a different mechanic that knows a little more about Jeeps ... the PCM, despite all its problems, is well-sealed against liquids.

So, the thermostat didn't open and the radiator cap spewed a bunch of antifreeze (I'm assuming into the container by the PCM)? Sounds to me like your Jeep overheated in a significant way, and (if so) you may be looking at something much more expensive than a PCM. If it overheated, you might want to have your mechanic check for mechanical problems related to an engine overheating, such as a warped head, cracked head, blown head gasket, etc.
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Unread 06-19-2013, 09:44 AM   #4
JohnnyZJ
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1992 YJ Wrangler 
 
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so you have a 'no spark' issue that has no codes? coil.


if theres no codes theres other crap wrong with your jeep too though.

post back when you get it back and fixed
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Unread 06-19-2013, 12:01 PM   #5
ThundROkieZJ98
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thanks guys gonna do some investigating
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Unread 06-19-2013, 12:23 PM   #6
ThundROkieZJ98
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1998 ZJ 
 
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ok so I misunderstood my mechanics explanation apparently.i thought he was saying no codes. evidently he was saying the code he did get was saying I had a bad PCM .
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Unread 06-19-2013, 01:06 PM   #7
dellis
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What is the code? He should be able to tell you the code.
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Unread 06-19-2013, 07:52 PM   #8
ZeeJay1997
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1997 ZJ 
 
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Water can migrate into the connectors, but not the PCM.

Disconnect battery, remove water reservoir, disconnect PCM plugs and blow them out with air or let them air dry.

Once that is done and reassembled, turn switch on an see if the CEL comes on for 3 seconds. If it does the PCM is alive, but not necessarily healthy.

If it got hot enough to blow coolant out the reservoir, the head probably warped.
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