1. Register Today It's free! This box and some ads will disappear once registered!

    Dismiss Notice

93 Explorer shuts off on its own after warming up.

Discussion in 'Stock 1991 - 1994 Explorers' started by Zinith, July 13, 2017.

^^Searches ExplorerForum.com^^



Do Not Sell My Personal Information


  1. Zinith

    Zinith New Member

    Joined:
    January 21, 2017
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    1
    City, State:
    Ravenswood, WV
    Year, Model & Trim Level:
    93Expl.XLT 4l v6 2wd auto
    It starts up and runs like a champ. But after about 3-5 mins of it running. It starts running really rough and will eventually shut off all on its own. It smells really bad because of it running so rich. Ive already cleaned the snot out of the MAF sensor, knocked out both catalytic converters (which ended up looking nearly perfect), and scrubbed off the black soot off the o2 sensors (the 2 of which i could find) and blowed them off with compressed air.

    At this point i'm not sure what else to do. If anyone could suggest something to do, id really appreciate it!
     
  2. Support EF

    Join the Elite Explorers for $20.

    Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose fix problems yourself and learn which modifications work without having to experiment on your own. Elite Explorer members see practically no advertisements, can add their own profile photo, upload photo attachments in all forums, and Media Gallery, create more private Conversations, and more. Join Today. Your support is greatly appreciated.



  3. Rick

    Rick Pumpkin Pilot Staff Member Admin Elite Explorer

    Joined:
    February 8, 1999
    Messages:
    31,741
    Media:
    43
    Albums:
    4
    Likes Received:
    887
    Trophy Points:
    143
    City, State:
    Wayoutin, Aridzona
    Year, Model & Trim Level:
    '93 XL Pumpkin Edition
    Callsign:
    AB7FH
  4. chevyh8ter

    chevyh8ter Member

    Joined:
    March 12, 2009
    Messages:
    64
    Likes Received:
    3
    Trophy Points:
    8
    Year, Model & Trim Level:
    97 ford explorer
    Have you tested spark after if shuts off ? There is a ignition module behind the passenger headlight. I had mine checked at Advance Auto for free.
    I've also been told a bad EGR system will cause the engine to run rough. It may be causing some other issues as it starts to stumble. :dunno:
     
  5. Zinith

    Zinith New Member

    Joined:
    January 21, 2017
    Messages:
    21
    Likes Received:
    0
    Trophy Points:
    1
    City, State:
    Ravenswood, WV
    Year, Model & Trim Level:
    93Expl.XLT 4l v6 2wd auto
    The fuel pressure regulator seemed to be fine. It was tested and was sitting right around 28 pounds of pressure at idle. and up to 40 pounds when it was revved up and held at 3,000 rpm. When it was shut off it held the idle pressure for 15 mins afterwards.

    The fuel filter was taken off and replaced because there was actually a lot of resistance when trying to blow through it. But even then, it only increased it 1 pound.
    - Rick

    I did not get around to checking the spark after it shuts off chevyh8ter.

    Turns out what fixed it was putting in a new drivers side oxygen sensor. I guess it went bad at some point all of the sudden. (id expect to notice signs of it going bad instead of it just completely giving up all of the sudden like it did.) I think that because the o2 sensor degraded and could no longer operate within the temperature threshold, once it got too hot it started sending (or not sending at all) the correct information the computer needed. So the computer would be panicking to solve the issue; i.e. - holding back on how much gas was injected into the cylinders which the engine needs to run. And little by little the engine would get less and less gas and would end up "acting" like it ran out of gas and just quit.

    That's just my thought.

    Its now driving like itself again with no problem at all. I actually think it drives a little quieter down the road now too. Even for the catalytic converters being busted out of it.

    And hopefully it gets better gas mileage than it was before after having cleaned that MAF sensor. (which I'm guessing brought that o2 sensor's demise.)
    Normally its rated for around 18 miles per gallon when driving in the city. But mine hardly ever got any better than 10 just driving it around town.

    I thank and appreciate both of you guys for your help! :)

    One more thing Rick. I think I've located where my engine is leaking coolant. I believe its from the freeze plugs. Should I go ahead and make a new thread talking about all of that? Like whichever ones I should use to replace them with; i.e. (rubber or regular metal plugs) and whether or not I should replace them all at once. Under the thought if one is bad then the others are on the way? (right thinking?) And if I should replace them all then I think i should pull the engine out. And then ask where I could find detailed instructions on how to do that. (if it's needed) And while I have the engine out if there are things I should go ahead and look at and replace while It's easily accessible.
    I'm asking because I feel it'd be a little irrelevant to this thread title. ( and honestly after writing all of this I'm thinking more and more that I should just go ahead and make a new thread about this. But because I've already got all of this written, ill just leave it out of curiosity of whether or not you'd be able to answer all of those questions. (if its not too much of a pain. :) ))
     
  6. chevyh8ter

    chevyh8ter Member

    Joined:
    March 12, 2009
    Messages:
    64
    Likes Received:
    3
    Trophy Points:
    8
    Year, Model & Trim Level:
    97 ford explorer
    You want to make a new thread, trust me. Try to be concise and stay on topic.
    If people become over burdened with too much information, they'll become disconcerned and forget about helping you. Plus it makes indexing/searching old topics better. Have you ever searched a topic only to find the information is any but what you were actually looking for ? Its a waste of time and can be disappointing. :banghead:
     
    • Like Like x 1
  7. Centaurious

    Centaurious Active Member

    Joined:
    April 28, 2015
    Messages:
    379
    Likes Received:
    75
    Trophy Points:
    38
    City, State:
    Pensacola FL
    Year, Model & Trim Level:
    1994 Explorer Sport
    You may have a bad ECU Temp Sensor. It is near the thermostat and has 2 wires, the single wire sensor there is for the temp gauge. If the sensor is bad it acts like a stuck closed choke, IE running rich and affecting the O2 sensors.
     

Share This Page







We Support Our Troops!