Tuning recommendations??
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Trailering
Joined: Dec 2023
Posts: 18
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Tuning recommendations??
I have a 351w in a 94 F-250. Rebuilt engine stock bottom end, cam, aluminum heads, long tube headers. Truck has a speed density system and I fully removed the EGR system. I’m throwing check engine lights related to the EGR system. I want to have the truck tuned to ignore the EGR and maximize performance. What are my options?? Local shop told me I need to buy a Holley Terminator and have it dynod. Trying to keep this as cheap as possible.
Hotshot
Joined: Jun 2015
Posts: 12,878
Likes: 2,446
If you want to keep the light off but not have EGR: Put the EGR valve and sensor back on with a block off plate between the intake manifold and the valve. Then connect the solenoid to the wire harness and reconnect the vacuum lines. Another expensive option is to replace the computer with one from Stinger Performance. The second option will allow you to tune for the changes you made.
Cargo Master
Joined: Mar 2007
Posts: 2,855
Likes: 1,036
I have a Tweecer and that is my only experience. I also have a 95 F250/5.8/CA/MAF.
That said, after I installed it and got the program set up, there is a box to click to tell the EEC-IV you do not have EGR. There is also a few settings to disable the check engine light. There are a lot of basic settings to make the engine run better that does not take a computer engineer to figure out.
If you want more, it's a huge learning curve. Is it rewarding? I guess it depends on how much frustration you can deal with. I don't think anyone says Tweecer is easy to use, but at this time, I have been able to fix my shift timing, quality [soft/firm], and now I can pull a certain pass in 2nd gear with improved economy from 5mpg to 7mpg.
I guess Quarterhorse is a bit easier. Both are cheaper than a complete system EFI system.
That said, after I installed it and got the program set up, there is a box to click to tell the EEC-IV you do not have EGR. There is also a few settings to disable the check engine light. There are a lot of basic settings to make the engine run better that does not take a computer engineer to figure out.
If you want more, it's a huge learning curve. Is it rewarding? I guess it depends on how much frustration you can deal with. I don't think anyone says Tweecer is easy to use, but at this time, I have been able to fix my shift timing, quality [soft/firm], and now I can pull a certain pass in 2nd gear with improved economy from 5mpg to 7mpg.
I guess Quarterhorse is a bit easier. Both are cheaper than a complete system EFI system.
Laughing Gas
Joined: Dec 2005
Posts: 904
Likes: 115
From: Laurel, MS
Check out the PimpX ECU by Stinger Performance. It's a Megasquirt ECU that plugs into your factory wiring.
Here's my writeup from when I installed mine. I have a manual transmission, so I didn't need transmission control.
If you need transmission control you will probably need the PimpXShift version.
https://www.ford-trucks.com/forums/1...x-install.html
Here's my writeup from when I installed mine. I have a manual transmission, so I didn't need transmission control.
If you need transmission control you will probably need the PimpXShift version.
https://www.ford-trucks.com/forums/1...x-install.html
Logistics Pro
Joined: Aug 2014
Posts: 3,570
Likes: 854
Plug back in your EGR, cheapest option, no tuning.
Get a decent A/F gauge, if its within acceptable parameters you probably do not need a tune.
Moates QuarterHorse cheapest tuning option, big learning curve, supports your stock SD computer.
PimpX, most expensive tuning option.
You dont't need it dynoed if you can data log, which PimpX should do, QuarterHorse definitely does.
Get a decent A/F gauge, if its within acceptable parameters you probably do not need a tune.
Moates QuarterHorse cheapest tuning option, big learning curve, supports your stock SD computer.
PimpX, most expensive tuning option.
You dont't need it dynoed if you can data log, which PimpX should do, QuarterHorse definitely does.
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Trailering
Joined: Dec 2023
Posts: 18
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I have an egr delete plug. If I were to just plug in the egr solenoids to the harness without any vac lines would that fool the computer into thinking everythings in place? I’m missing a solenoid so I need to buy another or I would just try it.
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Hotshot
Joined: Jun 2015
Posts: 12,878
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Computer is looking for a different voltage to determine if the valve is open or closed. How is a resistor with a set value going to do that? I don’t think that would work since the sensor is on the EGR valve with needs vacuum to move. You can remove the vacuum lines from the TAB & TAD solenoids to fool the computer. I ran the 302 that way for 5 years without setting any codes.
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Trailering
Joined: Dec 2023
Posts: 18
Likes: 0
Maybe ill setup the EGR valve and solenoid to avoid CEL for now. Is anyone sure whether tab tad sensors need to be in place to avoid a light? Hard to find it seems. Only getting EGR code currently.
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Your options are to add a Tweecer or Quarterhorse module with the OEM computer or replace it with a tunable Pimpx computer. The first 2 are the cheapest but most technically complex to use, the Pimpx isn't cheap but is easier to use.
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