Question about 1992 Ford F250

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I have a 93 ford f250 4x4 7.3 turbo diesel i am having trouble i replaced the glow plugs and the glow plug soienod and the brane under it and when i turn key on wait to start light comes on then emedietly the light goes off and takes along time to start only if it has been sitting for about twenty min or longer what could be the problem

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When light goes out glow plugs still heating so count 15 seconds after ligh goes out the crank on key

Posted on Nov 02, 2017


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6ya staff

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Hi there,
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Posted on Jan 02, 2017


Jeremy Moore

  • 1940 Answers

SOURCE: i have a 92 ford

  1. It sounds like your batteries are rundown, and to start you need around 200 RPM cranking speed. Try and get a boost to your batteries by jumping with another truck, or change your batteries out for new ones.
  2. If you haven't already, check your fuses. Replace any blown fuses and try again.
  3. Have you ever changed the fuel filter? If it has been a while, try changing the fuel filter. If you decide to use ether to start the engine, be very careful. Spray a small amount on a rag and place it over the intake of the air cleaner. DO NOT REMOVE THE AIR CLEANER! On engines with glow plugs, if the ether flows into a cylinder with the intake valve open and hits the red-hot glow plug, you have a fire! If the engine starts with the starting fluid, you have a fuel problem.
  4. Check each glow plug for continuity, either with an Ohm meter or a test light. Test the glow plug leads for continuity as they incorporate a fusible link.
  5. On the 7.3's, it is common for the heater element to fail, which can cause a fuse to blow. Try unplugging the heater and the fuel bowl heater.

I’m happy to help further over the phone at

Posted on Feb 24, 2011

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