Question about Ford Explorer

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My 1998 ford explorer runs ruff it idles at about 500- 700 rpm real ruff and driving it is ruff and very jerky no codes come up garyirving@aol.com

I have replaced the plugs and wires,and fuel filter and it runs ruff yet it comes up with no codes showing probums garyirving2150@aol.com

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The computer is the only thing that will not throw a code since it cannot tell on itself, but have you checked to see if there is water in the fuel? Seafoam is a good product to use to try and displace any water in the fuel. I am not saying to do this, but... on my offroad car (not for street legal use*) I pour one bottle of the 90% isopropyl alcohol in the tank with as low of a tank of gas as possible, and it usually does the trick. Water in the fuel will do pretty much exactly as you are describing, so it might be worth it to try one of those suggestions, hopefully someone with one of these trucks will be able to shine some light on the subject, good luck

Posted on Jan 18, 2013

  • Gary Irving
    Gary Irving Jan 18, 2013

    ther is no water in gas i did ad a can of sea form also did a bottle of injector cleaner they did not help

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Posted on Jan 02, 2017

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SOURCE: My 1998 Ford Explorer runs rough under hard acceleration

New plugs and wires?

Double check to make sure that you've got the routing and firing order right... if you have 2 switched, the car may still idle well but then pop and sputter on harder acceleration.

The next step would be to run some "Complete Fuel System Cleaner"... If that's the problem, you should see results within 20 miles or so.

Posted on Apr 29, 2010

wyatt1582
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SOURCE: 1998 FORD CONTOUR CHECK ENGINE

sounds like EGR valve and sensor this controls idle speed when at a stop. the po171 is a burn lean or rich code need to know what bank 1 or 2. also check for a vacuum leak from one of the hoses.

Posted on Aug 07, 2010

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