351 Windsor Intake swap

[C-Dubb]

Hello all, I am a total newbie and was hoping to get some advise from you more experienced guys. I am about to start gathering parts for an intake swap on my 351 Windsor EFI. The engine is either a 96' or a 97' and the previous owner installed it with the truck upper intake along with a massive hole in the hood. I am planning on using the BC Bronco adapter and a mustang upper intake but still have a few questions.

* Do I use the throttle body and throttle position sensor from the mustang? If so, will the TPS plug directly into my existing harness?

* Will I be able to reuse my current MAF sensor? If not do I use the one from a mustang as well? Will it plug into my existing harness?

* Anything else that I will encounter that I am not thinking about?

 

[Timmy390]

I'll try and help......

The upper intake that works with the BC adapter is the 1986-1993 Mustang.

What EFI are you running? I'm assuming Truck Mass Air or is it Mustang?

If Truck, you might want to reach out to EGIGuy and get his thoughts. It's more than likely going to need a tune to run it's best no matter the part. Make sue he can tune the ECM.

Tim

 

[C-Dubb]

It is the truck Mass Air. The previous owner purchased it all new from Ford. He told me this whole setup was intended for a 96' or 97' F-250.

 

[Timmy390]

This should be the pinouts........t was for my 96 van that was SD I converted to SN95 Mustang

Tim

 

[gclauson]

TB and MAF

Hello all, I am a total newbie and was hoping to get some advise from you more experienced guys. I am about to start gathering parts for an intake swap on my 351 Windsor EFI. The engine is either a 96' or a 97' and the previous owner installed it with the truck upper intake along with a massive hole in the hood. I am planning on using the BC Bronco adapter and a mustang upper intake but still have a few questions.

* Do I use the throttle body and throttle position sensor from the mustang? If so, will the TPS plug directly into my existing harness?

* Will I be able to reuse my current MAF sensor? If not do I use the one from a mustang as well? Will it plug into my existing harness?

* Anything else that I will encounter that I am not thinking about?

With the Mustang upper, you will need to use the Mustang throttle body and you may need the Mustang EGR spacer if you need to keep EGR for emissions. Since the truck EGR is a different configuration, you may need to cobble together parts to get it all to work.

I'm not sure if the Mustang TPS and truck TPS have the same electrical range, but I bet so. Also the truck TPS may have different mounting than the Mustang TPS. If the connectors are different, you may need to re-pin the mustang TPS to match the truck harness.

As long as you can physically connect the MAF tubing diameters, you should be able to use the MAF, unchanged.

Likewise, I don't think that you'll need to change the ECM to Mustang, unless you are making engine mods that can't be tuned in the truck ECM. If I recall, I don't think the Mustang ECM will even plug in, as a 96-97 OBDII system will use the EEC-V ECM, not EEC-IV. Possible upgrade to Explorer ECM, but EFI Guy is your guru on that.

Depending if you orient the Mustang upper with the TB on the driver side or passenger side, you may need to extend MAF, IAC, and/or TB harnesses.

Your throttle cable will probably need to be modified or upgraded.

Hopefully I have gotten this all correct, but if not, others will fix it. Good luck.

 

[Timmy390]

If I recall, I don't think the Mustang ECM will even plug in, as a 96-97 OBDII system will use the EEC-V ECM, not EEC-IV. Possible upgrade to Explorer ECM, but EFI Guy is your guru on that.

The OP needs to figure out what he has......The BIG trucks were OBDI in 95 (I posed the pin outs) and even after. My 96 E350 van was ODBI. It was Speed Density. There was a loophole in the law that allowed Ford to do this based on vehicle weight It even had an OBDII plug under the dash but it was OBDI 60 pin.

Because the OP's system was bought through Ford and not pulled off a truck, it could be either.

Tim

 

[Broncobowsher]

60 pin connector is EEC-IV
104 pin connector is EEC-V

 

[C-Dubb]

I had just assumed 96' and newer would be EEC-V/OBD2, I will double check what I have later today and update.

 

[C-Dubb]

OK, Just looked at my ECM and it is EEC-IV (F3ZF-12A650-FB C3W1).

 

[Timmy390]

Got his off a STANG site......Seems to be 89-93 5.0 ECU C3W1 (same as A9P)

is it chipped? as in does it an have added board sticking out the side? Garry (EFIGuy) will know all about it and if it truly is a Stang ECM, he can program it to work with about any part you want to use.......

I noticed that I have a C3W computer, not an A9P. Will it be worth switching to an A9P computer? Are the tunes in these two AOD MAF computers different?

The A9P is based on slightly older code (GUF1) so there are some differences between it and the A9L (GUFB). The A9P's brother EECs that are 100% interchangeable with it are the C3W and C3W1. They are to the A9P the way all those other EECs mentioned are to the A9L. Notice the codes GUF1 and GUFB. Those are memory strategy codes. All EECs following the same strategy can be loaded with the same parameters of any other EEC of the same strategy.

The A9P code is missing some idle control logic that the A9L has. And the settings in the code that's common between the two are fairly different. It's quite possible for someone to notice the difference between an A9P and A9L, but surprisingly MOST people with manual trannys don't. In fact, the only people that notice the difference are people with automatics that replace their A9P (tuned for automatics) with an A9L (tuned for manuals). What they notice is when they put the tranny in gear, the engine could stumble or completely conk out when the tranny loads up the engine in drive/reverse. With a tuning device, this is 100% tunable for in the A9L because the A9L has ALL the code the A9P has...just different settings/parameters.

The A9T is another EEC that follows the same memory strategy as A9P. The A9T was tuned for the State Patrol 5.0L Mustangs in the late 80s and early 90s. They are rich-tuned in Closed Loop, but at WOT run a bit leaner than stock A9P. The stock 5.0L GT EECs are notorious for being overly rich at WOT to the point of loosing power. Presumably Ford made the assumption that people would put mods on the engine and to be safe, it is rich-tuned...better to be too rich than too lean. Another benefit the A9T has over the A9P is a higher spark advance at WOT and non-WOT conditions. I have no clue what mechanical differences there were between the stock GTs and the State Patrol 5.0Ls, but the tune is certainly different and obviously directed to improve performance. The only non-performance difference in the tune is a slightly higher EGR flow likely to help with NOx emissions due to the higher spark advance.

Interestingly the A9L has a similar cousin EEC that follows its strategy called the X3Z. The X3Z is the EEC used on the 93 Cobra. It is NOT a direct drop-in for the A9L because of 2 very important differences amongst 100s of minor differences. The X3Z was tuned expecting 24lb injectors and a 70mm MAF which is the main reason it isn't a direct swap. But because it follows the same strategy as the A9L, you can load an X3Z tune into an A9L using the TwEECer or Moates chip.

One of the most interesting differences about the X3Z is it supports Decel Fuel Shut-Off (DFSO) where none of the Mustang GT tunes have this enabled. What this does is turns off the injectors when the RPMs are held high at closed throttle by a manual tranny. So for instance, if you have DFSO enabled and coast down a hill in gear, the EEC will literally stop firing the injectors so you burn no fuel going down a hill. This does create additional engine braking as compared to an engine without DFSO enabled. Higher compression and stroker engines experience a fair amount of additional engine braking,

Tim

 

[C-Dubb]

Got his off a STANG site......Seems to be 89-93 5.0 ECU C3W1 (same as A9P)

is it chipped? as in does it an have added board sticking out the side? Garry (EFIGuy) will know all about it and if it truly is a Stang ECM, he can program it to work with about any part you want to use.......

Tim

My ECM does not have anything attached to it except the wiring harness. Sounds like I need to talk to EFI Guy before moving too far forward. I appreciate all the help thus far, this site is great. I will keep updating as I go.