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1994.5 - 1997 7.3L Power Stroke Diesel  

Gearhead tunes on 7.3. Not so great experience

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Old Dec 14, 2017 | 06:54 AM
  #16  
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Originally Posted by mcali2
Seriously how hard can it be? Same setup thousands of times.
My thoughts exactly. There is no reason in the world to get tuning for a 7.3 wrong at this time.
 
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Old Dec 14, 2017 | 11:24 AM
  #17  
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Oh, you have no idea.
There was something like 2 million 7.3 trucks made and every one runs differently.
What works great for one truck makes another run like junk.
I know from experience.
It's not about getting it right after all these years. They would get it right if they were sitting in the seat tuning the truck.
But sending a chip out is their best guess based on the hundreds or thousands of trucks they have tuned. No guarantees at all on how it will run. It's just the way it is, and why after 15 years in this game I still don't have good tunes for my truck.
Well, I did once about 9 years ago when Bill (PHP) live tuned it. But dummy me went and changed things up and the tuning headache started all over.
A few years ago I got so sick of the tuning never getting the shifting right that I swapped in a ZF 5 speed.
Now I need to keep playing with Minotuar and hope I can nail it down myself one of these days.
 
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Old Dec 14, 2017 | 11:47 AM
  #18  
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I know what Jim is saying. Jonathan (dynoproven) actually nailed it once for me when I had stage II's. The shift points were perfect but saying that on this forum I took a lot of crap because it was from Jonathan. Didn't matter to me, blast away. The problem came when I switched to stage I's. I asked Jonathan to leave everything the same (shift points) and change the tuning to stage I's. Sounds simple but he completely blew it and time after time trying to get ahold of him and months going by I finally gave up. I had him on the phone and told him what I thought. I've gone hydra and five different tuners later Gearhead nailed it again. Shift points are most important to me, power without to high of EGT's is second. I'm not a weekend camper who pulls his 17k 5er with a F150 three miles to the campsite!
 
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Old Dec 14, 2017 | 10:55 PM
  #19  
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Hmmm ok this is something I did think of when my tune didn’t run right. But how is it so hard to tune a truck if you already know what mods the person has ? Only because I don’t see how one 7.3 can run that much different than another beings that these 7.3s are like dinosaurs they don’t have maf or o2 sensors or variable cam timing, very basic motors And if a 7.3 was different enough from one to another you’d think it’d show up as a drivableity issues with a difference in pressures like hpop fuel and compression. So how can tuning vary that much ? And my truck ran fine with ts tune
 
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Old Dec 15, 2017 | 12:45 AM
  #20  
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Funny that ford could tune every truck just fine with 1 tune.
 
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Old Dec 15, 2017 | 07:12 AM
  #21  
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Originally Posted by mcali2
Funny that ford could tune every truck just fine with 1 tune.

?? NOT just one tune. Have you seen the 100 or so ECM variations what Ford made? And that is when they were NEW. Now these trucks are 20+ years old with different parts, worn out parts, new parts Etc. There is a reason why canned tunes suck
 
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Old Dec 16, 2017 | 09:29 AM
  #22  
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Originally Posted by DZL JIM
Oh, you have no idea.
There was something like 2 million 7.3 trucks made and every one runs differently.
What works great for one truck makes another run like junk.
I know from experience.
It's not about getting it right after all these years. They would get it right if they were sitting in the seat tuning the truck.
But sending a chip out is their best guess based on the hundreds or thousands of trucks they have tuned. No guarantees at all on how it will run. It's just the way it is, and why after 15 years in this game I still don't have good tunes for my truck.
Well, I did once about 9 years ago when Bill (PHP) live tuned it. But dummy me went and changed things up and the tuning headache started all over.
A few years ago I got so sick of the tuning never getting the shifting right that I swapped in a ZF 5 speed.
Now I need to keep playing with Minotuar and hope I can nail it down myself one of these days.
This makes more sense Jim. Thanks for chiming in. I stand corrected. I know my tuner guy nailed it on my truck, but didn't live tune. He knows what he is doing as he has a lot of happy customers, but who knows?
 
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Old Dec 16, 2017 | 10:17 AM
  #23  
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Jim knows me, Byron.

Just a bit of clarification, but just because there are literally hundreds of calibrations doesn't mean that they're monumentally different. For example, the 94.5-97 49-state trucks (A0 or AA injectors) pretty much have all identical engine mapping. Same for the split-shot vehicles. All it took for Ford to release another calibration was something emissions-related or a 0.5 MPH shift speed change in one gear. There is very little difference from one calibration to the next when dealing with how the engine operates. Transmission stuff was where most of the changes were made. Another example: The only difference between TDE0 and TDE1 (or MLE0 and MLE1) was a bunch more "code" for OBDII.

If a stock pickup doesn't have any moderate/major engine or transmission problems and runs fine on stock tuning, there is NO reason for aftermarket tuning to make it run worse unless something was changed from stock that shouldn't have been (either accidentally or intentionally).

Just as an example, I'll post some screenshots once my other computer decides to finally "wake up"; it takes about three minutes for the login screen and another fifteen minutes to finally get to the home screen. Once that happens, it's a matter of waiting for the hard drive to stop running constantly (usually another ten minutes) before opening any programs.
 
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Old Dec 16, 2017 | 11:28 AM
  #24  
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Pointless pictures of actual tuning maps deleted.
 
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Old Dec 16, 2017 | 11:57 AM
  #25  
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One more post of deleted screenshots.
 
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Old Dec 18, 2017 | 10:08 PM
  #26  
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Ok so back to my review. Gearhead is reburning my tune and sending it out tomorrow. Matt is personally handling it.
 
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Old Dec 18, 2017 | 10:17 PM
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That's great, I figured they would take care of you. When I switched from I's to II's they reburned them for me very fast.
 
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Old Dec 19, 2017 | 07:59 AM
  #28  
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You should be in good hands now. Matt knows his stuff from what I hear.
 
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Old Dec 19, 2017 | 10:40 PM
  #29  
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Yeah for sure I’m glad he’s handling it. I’ll get it on Friday and will install it after work and hopefully the tune will be just right
 
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Old Dec 20, 2017 | 08:05 PM
  #30  
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I'm glad I don't have these issues.
 
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