1989 F350 7.3 nonturbo Diesel Start Problem

Discussion in 'Ford Truck Forum' started by AJofArizona, Feb 20, 2010.

  1. AJofArizona

    AJofArizona Senior Member

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    Need some help. I have a 1989 F350 7.3 non-turbo Diesel that doesn't start up in the morning when its cold or hot. have to use starting fluid to get it started if it sits for more than 6 or so hours. Any ideas?:help:
     
  2. Case 7230

    Case 7230 Senior Member

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    Sounds like you have an air intrusion problem causing fuel to drain back when it sits for any length of time. The most common cause of this is bad fuel return lines (pipes that run between the fuel injectors). Fitting a new return line kit usually solves the problem.
    Another cause could be bad glowplugs. How long does your Wait To Start light stay on? When cold should be around 10-15secs. Less than that and you could have one or more bad glowplugs.
    Use as little ether as possible, easy to break piston rings on these engines.
     
  3. gpmorgan

    gpmorgan Auto Banned

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    im with case. glowplugs or does it have an intake heater. not to familiar with automotive diesels.
     
  4. fuzzy

    fuzzy Full Member

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    I also agree with Case bad glow plugs or it's losing prime in the fuel system and sucking air.
     
  5. mrjohnwayne

    mrjohnwayne Full Member

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    my vote would be something with the glow plugs, either a few bad glow plugs or a malfunctioning controller, but it could be fuel related as well.
     
  6. robert7642004

    robert7642004 New Member

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    i just bought a 90 with a 7.3 and it did the same thing. i bought new glow plugs for it and it starts without starting fluid as long as it is above 20 degrees outside. if its colder than that i have to plug it in at night.
     
  7. leolkfrm

    leolkfrm Full Member

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    i agree with checking the glow plugs, since it starts with the block heater. something else to try is to double cycle the glow plugs before trying to start it, however if there are too many bad ones it won't help
     

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