Taking the fuel adjustment back to stock

Discussion in '6.9L IH & 7.3L IDI Diesels' started by HicksNthaStix, Dec 8, 2018.

  1. HicksNthaStix

    HicksNthaStix Registered User

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    Hello. I've been around diesel equipment and I have been issued diesel company trucks in the past. However, this is my first rodeo owning my own diesel. Truck is a 1993 f-250 7.3 idi with the factory turbo. The guy that I got it from said that the fuel had been turned up by a previous owner. I'd like to take it back to stock settings. I'm not really interested in high performance. Just want to pull logs and equipment with this truck. I'm aware of the procedure to adjust the fuel but have no idea how to go about getting it where it needs to be.
     
  2. Thewespaul

    Thewespaul Supporting Vendor Supporting Member

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    There’s no way to get it exactly back to stock without pulling the pump and putting it on a test stand. I would recommend putting some gauges on the truck, and dialing back the fuel until you are happy with the readouts.
     
  3. Macrobb

    Macrobb Full Access Member

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    Pretty much. And honestly, there's no need to. If you've got an EGT gauge, turn it down if it gets over, say, 1050F worst case. Also, watch your exhaust. If you are smoking a bunch, turn it down a bit and see. One flat can change how much smoke you emit from none to a lot and vice-versa.

    Realistically, a "stock" factory turbo had no more power than a non-turbo one, and is honestly very anemic. If you plan on pulling a heavy trailer up-hill at more than 25MPH, be glad you've got the turbo(and a bit of extra fuel in there to use that extra air).

    Just adjust it to where it's comfortable and don't worry about it. The extra power(at that point) isn't hurting anything.
     
  4. HicksNthaStix

    HicksNthaStix Registered User

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    Thank you gentlemen. I'll leave it be, my main concern was fuel ecomony.
     
  5. Oledirtypearl86

    Oledirtypearl86 Full Access Member

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    I've found the best way to accommodate fuel economy is with the pedal my truck pulling in a hurry I can eat some fuel to the tune of 7.5 mpg if I slow down and not trying to hurry it's much better about 12 and that's towing empty driving like a granny 16
     
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  6. franklin2

    franklin2 Full Access Member

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    You can certainly "play" with the adjustment. I turned a stock 94 turbo idi back down for a guy. He had the ip rebuilt and the guy at the shop "turned it up" before it was re-installed on the truck. He had been driving it for several years this way, and did not like the way it smoked when pulling a load.

    I went in and turned it down one flat. He drove it, liked it and wanted to turn it down another flat. He test drove it, said it was ok, but when he was pulling his boat over Afton mountain on I 64, he had to downshift he could not leave it in overdrive. He did not like that, so we turned it back up one flat. After that he was happy, he could pull the mountain in overdrive pulling his boat, less smoke and better fuel mileage.

    Another thing he noticed, it took twice as many miles to get any heat out of the heater in the winter after we adjusted it.
     
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