1997 D90 Dies While driving - Defender Source
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  #1  
Old May 31st, 2012, 05:33 PM
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Doug Campbell
1997 D90
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1997 D90 Dies While driving

My D90 died while driving and will not start. Had a new coil so thats not the issue. It still cranks, but does not start.

It has done this a few times after running for 5 minutes, then died but always restarted when it cooled down.

Anyone been through this?
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  #2  
Old May 31st, 2012, 05:53 PM
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Joshua
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Did you replace your coil because of this issue? If not, then recheck your connections at the coil to ensure they're tight, first.
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  #3  
Old May 31st, 2012, 05:55 PM
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Jason England
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can you be a little more vague about the symtoms? You are not giving anyone much to go on!


How did it die? suddenly or fading through loss of power

when was the last time you changed the fuel filter?

How do you know the coil is not at fault? did it have this problem prior to changing the coil?

do you have a CEL or a code you could share?
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  #4  
Old May 31st, 2012, 05:55 PM
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I had something like this happen to me. Turned out to be one of the O2 sensors.
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  #5  
Old May 31st, 2012, 06:18 PM
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Doug Campbell
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It happens suddenly.
I replaced the coil as a possible fix, then it happened again today with the new coil.

Thanks for the fast replies, keep em coming!

------ Follow up post added May 31st, 2012 06:23 PM ------

It is a lack of spark problem, pretty sure of that.
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  #6  
Old May 31st, 2012, 06:35 PM
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if it's sudden likely a loose connection.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #7  
Old May 31st, 2012, 06:52 PM
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I had similar issue. Replaced O2 sensors, plugs, magnacore wires, new coil (was bleeding), fuel filter and alternator as was going... one of those did it as its never happened again...... rule out fuel issue and move from there.....
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  #8  
Old June 1st, 2012, 12:13 AM
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You say it's a 97 and you replaced 'the' coil? 97 is a GEMS truck and doesn't have a traditional coil, it has a coil pack with 4 seperate coil modules behind the plenum. Is this what you replaced?

What is making you sure its a lack of spark? The only thing that would take down all 4 that I can think of is the low tension wiring connection on the drivers side rocker cover or the ECU itself. Its completely different to a tradtiional set up.

You say it re-starts when it cools down are you sure its not a fuel pump on the way out or a blocked fuel filter as has been suggested?

Just tryng to understand so we can help you better.

Ian
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  #9  
Old June 1st, 2012, 06:59 AM
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Paul Koentges
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fuel pressure regulator; tap on the case several times to free up the diaphram, try to start. Symtom is similar to running out of gas...replace if going bad $$ if you have the clamp on oem style. Pressure should be 43...happened to me in Moab. Located on back top of motor behind the valve cover...

good luck

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  #10  
Old June 1st, 2012, 07:24 AM
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Sounds fuel related not ignition. Chances of all the coils going bad is very slim.
Does this only happen when the the tank is close to empty? you may be creating a vacuum that a weak fuel pump ultimately may not be able to overcome so car dies. The pump uses fuel as a coolant. Forget if fuel cap is sealed or vented but make sure you have the right type.
Have you checked the fuel pump pressure? Reading?
Original fuel pump?
When Did you last replace the fuel filter? If partly blocked and you drain the tank low you may well be pulling in more dirt and blocking fuel flow.
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  #11  
Old June 2nd, 2012, 09:38 PM
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Doug Campbell
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It was the crank sensor. Thank you for everyone's input and help.
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  #12  
Old June 3rd, 2012, 08:06 AM
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Quote:
Originally Posted by 1911D90 View Post
It was the crank sensor. Thank you for everyone's input and help.
Good, that was my guess. I think all GEM's owners should carry one like I do fuel pump relays.
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  #13  
Old June 3rd, 2012, 09:09 AM
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Do the 94's have the crank sensor? Just wandering to see if i should add it to my spare parts bag.....
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  #14  
Old June 3rd, 2012, 09:42 AM
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How do you test the sensor is ok or even (if possible) if it's going bad? (did not check the WSM maybe there is a test listed there)
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  #15  
Old June 4th, 2012, 12:22 AM
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Doug Campbell
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After this: What are the top 10 small spares to carry for a 97 nas?
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  #16  
Old June 4th, 2012, 07:38 AM
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AAA card and a mobile device with access to D-90.

Lets be honest ... It took best part of a week to diagnose the crank sensor .... What makes anyone think that just because they happen to carry one their ability to diagnose the fault would improve?

And 94/95 trucks don't have these.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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