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Difficulty tuning after mass air conversion

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Old May 8, 2020 | 07:54 PM
  #46  
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Originally Posted by raystankewitz
this seems to be the general Modus Operandi of most add-on equipment makers; they have something that works on a Mustang (sort of) so they try to expand that field by offering it to all Ford (or whatever) products, untested for the most part. These sellers usually have their behinds handed to them via internet reviews on a daily basis.

Stinger seems to be the odd man out, as they do have good support for a product, that if installed properly, will work. I plan to have Parkland Performance Auto Machine do my heads/manifold and get a cam from them when I build my 7.5 in my '97 F250HD. In some casual talks with them, the PimpXshift came up. They said, "No Problem!" Apparently the PimpX is held in high regard. That clinched the deal, so I'm going to put the big 255lph pumps in my truck, then the PimpXshift this summer sometime. Get the system up and running before I add the pumped engine. Hopefully find a donor engine that can be built while I drive my truck.

I would suggest to the OP, get in touch with Stinger, find out what you need to redo all the Jim-quackery IST asked you to do and install one of their systems..
Thanks for highlighting what you've heard from others who have used our systems.
 
Old May 9, 2020 | 01:46 AM
  #47  
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Originally Posted by SPE
Thanks for highlighting what you've heard from others who have used our systems.
You're welcome and you will eventually see an order from me for my truck in the future.

I certainly appreciate the effort you put into your hardware and right up front on your website inform us that it works with this and this and it may work with this but it's never been tested. That's what clued me into going the Stinger kit direction. I need the PimpXshift for my E4OD so I'll have to catch the wife unit in the right frame of mind to make the order.
 
Old May 9, 2020 | 08:59 AM
  #48  
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although the sniper is an option, it would not be legal where I live as it would involve removing factory emissions equipment. I am very interested in the pimpx computer although before I move forward with anything, I'd like to ensure that the issue is with the conversion kit and not a mistake I potentially made or an already pre existing issue with my truck because if that is the case, I could still have issues with another kit. Yes I did change the MAP sensor to a BARO sensor. I have not found out what ECM I have yet, I haven't had the time to do any work on the truck this week.
 
Old May 9, 2020 | 11:42 AM
  #49  
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SPE, I have a similar situation going on with IST. I have been involved in a few trucks converted using the IST kit several years ago and they worked great. Purchased one in January for a 1996 F350 460 w/e4od and still have not received all the parts and very little response from IST. I'm ready to dump this system and go with a different vendor.

Just built a new motor with a fairly aggressive cam and 30 lb injectors. I have not installed any of there IST parts yet but did start removing the wires per their instructions from the PCM connector.

Do you supply a kit to convert speed density to mass air for said truck?
 
Old May 9, 2020 | 12:16 PM
  #50  
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Originally Posted by Doug Lavarnway
SPE, I have a similar situation going on with IST. I have been involved in a few trucks converted using the IST kit several years ago and they worked great. Purchased one in January for a 1996 F350 460 w/e4od and still have not received all the parts and very little response from IST. I'm ready to dump this system and go with a different vendor.

Just built a new motor with a fairly aggressive cam and 30 lb injectors. I have not installed any of there IST parts yet but did start removing the wires per their instructions from the PCM connector.

Do you supply a kit to convert speed density to mass air for said truck?
I had the same issue when I ordered, the only way I got my kit is I filed a report with paypal who the money was sent to. Paypal withheld the funds from IST until they sent them proof the kit existed and was on its way to me. They quickly started cooperating
 
Old May 9, 2020 | 03:02 PM
  #51  
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Originally Posted by Doug Lavarnway
SPE, I have a similar situation going on with IST. I have been involved in a few trucks converted using the IST kit several years ago and they worked great. Purchased one in January for a 1996 F350 460 w/e4od and still have not received all the parts and very little response from IST. I'm ready to dump this system and go with a different vendor.

Just built a new motor with a fairly aggressive cam and 30 lb injectors. I have not installed any of there IST parts yet but did start removing the wires per their instructions from the PCM connector.

Do you supply a kit to convert speed density to mass air for said truck?
Our ECU's can run Speed Density or Mass Air. Out of thousands of customers essentially nobody uses Mass Air because speed density works so well. People who deal with this era of Fords have the "SD is bad" drilled into them but that statement isn't true once the stock ECU is out of the equation. SD is only bad when it's an ECU that you can't tune in which case mass air gives you more room for mods. That's no longer the case with an ECU you have full control over. Then mass air is just more cost and more complicated than it needs to be. Either way, our ECU's support it if you choose to go that way.
 
Old May 9, 2020 | 09:37 PM
  #52  
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The whole SD conversion to MAF confuses me. I know years ago, it may have been cheaper/easier to tune MAF.
But today, there are so many options to tune SD.

What is the purpose of the conversion?



 
Old May 9, 2020 | 09:41 PM
  #53  
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Originally Posted by wwhite
The whole SD conversion to MAF confuses me. I know years ago, it may have been cheaper/easier to tune MAF.
But today, there are so many options to tune SD.

What is the purpose of the conversion?
Years and years of "do a MAF swap" in the archives of this site and others vs a few years worth (at most) of there being more modern options for the same money. So when someone searches what to do, they are presented with a lot more info about MAF swaps than anything else simply because of how many years that was the only viable option.
 
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Old May 10, 2020 | 01:28 PM
  #54  
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Ok, so I've pulled the ECM out, Where would it be written?

 
Old May 10, 2020 | 01:56 PM
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That's an 'A9P', 'MA12A' = MAF, for an 'AOD'.

What transmission do you have mated to your 351w?
 
Old May 10, 2020 | 02:10 PM
  #56  
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That is an A9P mustang computer as I suspected. So as stated this system should just work if everything is hooked up correctly. Does this spreadsheet agree with the instructions you have as far as wires moved(colors) and added(grey)?

 
Old May 10, 2020 | 02:20 PM
  #57  
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Originally Posted by wwhite
The whole SD conversion to MAF confuses me. I know years ago, it may have been cheaper/easier to tune MAF.
No it was the ONLY way to get a tunable PCM at the time. None of these OBD1 computers are directly tunable it requires using a piggy back module that plugs into the J3 port to override the onboard ROM(Read Only Memory), this is how all the early chips worked and subsequently the tuners like the Tweecer and Quarterhorse. And technically any SD or MAF computer could be tuned but only the MAF versions were memory mapped by the enthusiast community who developed these devices because the 5.0 Mustang crowd were by far the bulk of the customers needing this capability, the SD truck computers were never supported because there was little or no demand for it.
 
Old May 10, 2020 | 02:25 PM
  #58  
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I have a T18 transmission. So everything seems to match up in terms of what I added except for the injectors. They have been wired in differently as you saw in the instructions for my firing order. What is the HEGO GND? and how does this ECM manage the tune, Is it based on the volume of air that it reads on the MAF and what the o2 sensors are telling the ECM?
 
Old May 10, 2020 | 02:34 PM
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Oh right there would be 2 pairs wired differently, 5/4 get swapped with 3/7.

15426378
13726548

The one outstanding thing would be the second O2 then, did you add the extra wire for the left(drivers side) sensor at pin43?
 
Old May 10, 2020 | 03:01 PM
  #60  
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Ok so for the 02 set up. The kit came with a wiring harness. So that wiring harness plugged into the old o2 sensor wiring connector then branched off into 2 new connectors (left and right sensor) the wiring also had one additional wire to be connected into pin 43 (Left HEGO). Now what I would like to confirm is if the O2 sensor connector is correct. as in I would have to trace from the 60 pin connector down to the O2 connector to comfirm the wires are correctly plugged in. The other option would be to run only one O2 sensor which is an alternate option as per the IST installation instructions.

(Connector on left side of photo is factory and right side is Right O2 sensor plug in.)

 



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