Ford EEC V programming

mustangmike6996

mustangmike6996

Club Member
This is a new territory for me but I think I need to program and tune a PCM. Without going into crazy detail, I have a 1951 Ford F1 that has a 1999/2001 Cobra engine swap and a Ron Francis standalone wire harness. The PCM is from a 2003 Cobra and had a Diablo Sport chip in it. The truck didn't run properly/at all with the Diablo Sport chip so I installed the OE chip that has the PATS (anti-theft) deleted. Since the 03/04 Cobras a supercharged, the tuning is obviously incorrect. I have a completely stock 2001 Cobra PCM. I would like to use that PCM as a startpoint. I would just delete PATS and then eventually tune the PCM myself when I install different performance parts (looking at doing big NA cams in the future). I have been looking at TwEECer which has the ability to delete PATS. Does anyone have any insight?

I have an SCT Xcal3 that is married to a car I sold, I could pay to unlock it and order some email tunes but that is still a few hundred bucks when everything is all said and done. TwEECer is like 300-400 from my limited research.
 
it might be possible to take the non forced induction programmed pcm and flash it with a file that would better suit the engine's needs. I'm no ford tuning expert, but I do have the 'tools' necessary to transfer the data onto the pcm while it's installed in the respective vehicle.
 
Beigg said:
it might be possible to take the non forced induction programmed pcm and flash it with a file that would better suit the engine's needs. I'm no ford tuning expert, but I do have the 'tools' necessary to transfer the data onto the pcm while it's installed in the respective vehicle.
Click to expand...

agreed, I know it can be done with gm pcms of the era, and hp tuners will do it
 
I wouldn't mess with trying to put the N/A cal into the 03/04 EEC, I'm sure they're different in more ways than just the cal.
I'd find an 01 EEC and use that, or go with a PIMP or other standalone.
In my experience, and if I could do it again I would go with the EEC that matches the engine for the baseline and work from that.
 
I have 2 PCMs. I'm currently running the 03 because it has the PATS deleted. The 01 is bone stock so I need to delete PATS so it'll fire the engine up.
 
Beigg said:
it might be possible to take the non forced induction programmed pcm and flash it with a file that would better suit the engine's needs. I'm no ford tuning expert, but I do have the 'tools' necessary to transfer the data onto the pcm while it's installed in the respective vehicle.
Click to expand...

What are you using for software?
 
hpt requires the pcm to be installed in to the car typically unless you can make a mock harness that functions as if it were in vehicle for use. I haven't worked with an 2001 cobra flash file, but as long as hpt supports it, I should be able to figure the system out.

It's better than a standard scan tool for most vehicles, just dont expect it to deliver the same across all vehicles even if it supports the platform.
 
Beigg said:
hpt requires the pcm to be installed in to the car typically unless you can make a mock harness that functions as if it were in vehicle for use. I haven't worked with an 2001 cobra flash file, but as long as hpt supports it, I should be able to figure the system out.

It's better than a standard scan tool for most vehicles, just dont expect it to deliver the same across all vehicles even if it supports the platform.
Click to expand...

I looked into the supported vehicles list and 2001 cobra is supported with the MPVI2 interface only(at this time)
 
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I have a engineering unlocked NGS with a unlocked VCM, depending on year of vehicle i can probably shut off PATS, but it needs to be in a vehicle
 
dave89iroc said:
I looked into the supported vehicles list and 2001 cobra is supported with the MPVI2 interface only(at this time)
Click to expand...

I couldn't find that listed, do you have a link? I tried the supported list page, but I might have overlooked it?
 
I have not been in the garage since this weekend so I don't have the info from the other PCM. I'll try to snap a picture later. I did buy an 80mm MAF to replace the 90mm that is on there currently.

I was finally able to get a scan tool connected to the DLC (I was fighting a low voltage issue that was not fully powering up the scan tool)

Here is some of the live data of the setup that has been running poorly since last year:
795RPM
Load 10% at idle 0% KOEO
ECT 79*F
Short Term Fuel Trim1: -1.6-3%
Long Term Fuel Trim1: 23%
Short Term Fuel Trim2: -0.8-1.6%
Long Term Fuel Trim2: 25%
Spark Advance 12-20* KOER 10*KOEO
IAT 97*F
MAF 0.11 @idle
Throttle Pos 18.4% @idle
O2S11 0.025v-0.7v (stayed close to 0.7v after running for a while)
Short Term Fuel Trim11: -2.3-0
O2S21 0.390v-0.760v (stayed close to 0.7v after running for a while)
Short Term Fuel Trim21: -0.8-2.3
Fuel Pressure Regulator 537 kpa (not running stock fuel pressure regulator. Running Aeromotive rails and FPR)

I have a battery quick disconnect that I would open after every use of the truck. After leaving it connected for extended periods, I did notice that the truck does start much better (I understand that it was clearing out its learned settings by doing so, but it was extremely tough to start prior to that).

I am currently checking cam timing to ensure the chains didn't stretch. I did not degree the cams with a degree wheel when I assembled the engine. I did follow the Ford service procedure (dot to dot alignment).

About the truck/build
Stock 1999 Cobra 4v engine rebuilt.
New Kellogg 8-bolt crank, stock rods, oversized flattop pistons from boring. Stock C-heads and cams. Teksid block
JLT cold-air intake, modified to fit in engine bay
BBK twin 65 powerplus throttle body
stock 24lb injectors
Aeromotive fuel rails
Aeromotive fuel pressure regulator (with boost reference port) set to 40 PSI. Verified constant 40 PSI during all running conditions
-8 fuel lines

Tremec T3650 5-speed
Explorer 8.8 rear axle w/3.73 gear

Ron Francis stand-alone harness
2003 Cobra PCM modified for Diablo Sport chip (chip currently removed due to crank-no-start)

To-do:
Check spark plug condition
Check timing chain/condition
Check fuel injectors for leaks (need to figure out a way to flow test these at home)
Compression test
Check throttle body blade set screw (per BBK 0.010 feeler gauge then 1 turn in)
Check IAC-seems to be free moving, not sure if this is causing high idle issue.

Recently completed:
Adjusted TPS 0.9v closed
Replaced spark plugs (runs slightly better)
 
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It looks like I might have 2 different intake cams... Still doing research. Pass side is the stock 1999 NA cam. The left looks like it might be a 2003/2004 blower cam. Close to each other but grind specs are slightly different.
 
Another update...

Still unsure of the left intake cam, the engineering number (essentially a part number) is YF3E-6A271-BA. Ford made grind changes on the 4V intake cams from the Cobra B or C head, Mach1,Lincoln, Terminator. This has the beginning number of an exhaust cam but the 271 indicates left intake position. I ran out of energy to keep searching for the part number and buttoned the engine back up. I put the new 80mm MAF on (removed the 90). Fired it up, it runs very strong. It's crazy fast now, almost scary. I still need to put the correct PCM in, and I'll eventually do cams. I'll prob have to rebuild the trans sooner than I intended haha
 
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