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1991 Superduty Ford with Wait to Start issues

Discussion in 'Trucks and Trailers' started by trailbuilder, May 12, 2011.

  1. trailbuilder

    trailbuilder LawnSite Member
    Messages: 49

    I have a 91 Superduty, that is the 7.3 International engine....(GVW 14,500 that's why I like it). When I go to start it after about 3 seconds the wait to start light goes out and you can hear the relay or controller behind the firewall clicking very second. The glow plugs do not seem to heat up so I have to use starting fluid even in the spring/summer months. The Glow plug controller is $220!

    Anyone have any ideas?
  2. dbear

    dbear LawnSite Senior Member
    Messages: 606

    Um, is this a trick question? I'd probably replace the glow plug controller, and consider replacing the glow plugs themselves. I used to have a hard-starting '90 F250 w/7.3 I did just that to it many years ago; thing started better than new. As I recall with mine, the plugs made more of a difference, but I don't recall having the clicking noise from the controller that you describe.
  3. kodak mowing

    kodak mowing LawnSite Member
    Messages: 140

    i have a 94 f250 7.3 idi turbo,it either 1 or more bad glow plugs or the glow plug solenoid on the glow plug controller,i replaced mine for bosch glowplugs $3 each on ebay and new soleniod $15 bucks,hope that helps
  4. Milwaukee

    Milwaukee LawnSite Member
    Messages: 144

    Time for new glow plugs.

    By Way DON'T cheap on glow plugs. Would you put $1 oil in dragster engine?:nono:

    Get motorcraft BERU glow plugs.
  5. DQL10

    DQL10 LawnSite Senior Member
    Messages: 292

    I believe the clicking noise is are the glow plugs still heating up. Atleast thats what they are on the newer diesels. Just replace the glow plug control module. Doesnt seem that expensive to me. Wait till you buy a newer one and have to replace the FICM! Thats when they get expensive.
  6. Milwaukee

    Milwaukee LawnSite Member
    Messages: 144

    On my 6.9L IDI it doing that but it wouldn't stay ON. It come on for 2-3 sec but couldn't start. After replace whole glow plugs it come for 10-13 seconds then start like new.
  7. wvmike

    wvmike LawnSite Member
    Messages: 27

    its the glow plugs.
  8. trailbuilder

    trailbuilder LawnSite Member
    Messages: 49

    Thanks, I will try glow plugs first before ordering the controller.

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