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Topic: 92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird? (Read 2492 times) previous topic - next topic

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #1 –
It should work. The 88+ Mk 7 uses some of the pins to run the on-board Cruise Control (35, 38, 39, 41, and 50) but they don't conflict with the Thunderbird pinout. They just don't get used.

You can compare them here.

http://fordfuelinjection.com/5.0Lpinouts.html
Matt
1984 Thunderbird - 89 302 HO, GT40 heads w/ Trick Flow springs, E303 cam, Edelbrock Performer 289 intake and 600 cfm 4bbl, Mustang headers, Jegs o/r H pipe, Dynomax lers, Mustang AOD and shifter, Mustang 8.8 w/ 3.73s, 3G alternator, Mustang front and rear sway bars, KYB 87-88 Turbo Coupe shocks and struts, and 11" front brakes.

1988 Mustang GT - GT40 heads, Explorer intake, 70mm throttle body, 70mm MAF, Crane 1.7 rrs, E303 cam, Kirban Kwik shifter w/ Pro 5.0 deluxe handle, aluminum clutch quadrant and firewall adjuster, o/r h pipe, Dynomax lers, 3G alternator, aluminum radiator, and 3.27 gears.
 
1986 Cougar 5.0, 1989 Mark VII LSC 5 speed, 1980 Mercury Zephyr 4 door (sold)

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #2 –
Looks like it should work, though if you want to modify it in the future, a more common ECU might offer more flexibility.
11.96 @ 118 MPH old 306 KB; 428W coming soon.

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #3 –
Speed limiter....
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #4 –
Quote from: V8Demon;265269
Speed limiter....


Unhuh... Ronnie(chrome 302jr) found that out when he was using one, car just laid down at something like 108mph...

NOW if the seed sensor input to the EEC is not connected, the limiter is inoperative...

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #5 –
Unhooking the VSS has the same effect, does it not?  Track purposes and whatnot...
-- 05 Mustang GT-Whipplecharged !!
--87 5.0 Trick Flow Heads & Intake - Custom Cam - Many other goodies...3100Lbs...Low12's!

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #6 –
I had vss unhooked on my a9p and had issues, I think.
It would just break up, like big time valve float, but not all the the time. since I hooked it up never had that problem again.This was on a 87.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #7 –
Speed limiter comes in at 117...chances are, if you have a 12-second t-bird, it's not running a Mark VII ECU.  I clipped the wire near the ECU...i want to say it was a solid green...it's been so long I can't remember.  That way your speedo stays functional and your ECU is none-the-wiser...it did idle a little high when coming to stops sometimes...no major issue though.
Project 3G: Grandpa Grocery Getter-'85 Crown Vic LTD 2-door, 351W with heavily ported/polished GT40 heads, heavily ported/polished Typhoon Power Plus upper & lower intake, Comp Cams 265DEH retarded 1*, FAST EZ-EFI, HD T5, 8.8" 3.73 trac lock with extra clutches, 3G alt. swap, '99 CVPI front brakes, '09 CVPI rear disc brakes, '00 CVPI booster&m/c + wilwood adj prop valve.

Parted & Gone-'88 T-bird Sport, 351W swap, ported GT40 heads

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #8 –
Quote from: Kitz Kat;265303
I had vss unhooked on my a9p and had issues, I think.
It would just break up, like big time valve float, but not all the the time. since I hooked it up never had that problem again.This was on a 87.



The A9P (a MAF computer, which I run as well) needs the VSS input to function correctly. A SD computer does not, except for the speed limiter. The nice thing is I didn't have to run VSS wires in my car when I did the MAF swap as the 88 Birds/Cats had the wires from the factory. The 87 and down cars didn't though ;)

I ran a Mark VII SD computer for a year and it worked fine for me. I couldn't break 108 in the quarter so I'm pretty sure a stock HO (if that's what he's using) won't either. Besides one shouldn't be driving 108 mph on the street any ways;) If you've got one use it or if it's easier to find use it. The engine won't know the difference.
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #9 –
'87 Cougar here - VSS equipped.
11.96 @ 118 MPH old 306 KB; 428W coming soon.

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #10 –
Quote from: Cougar5.0;265332
'87 Cougar here - VSS equipped.


Hmm maybe they switched later in the 87 production run? I've seen 87 T-birds and Cougars with out the VSS pins :crazy:
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #11 –
Quote from: thunderjet302;265343
Hmm maybe they switched later in the 87 production run? I've seen 87 T-birds and Cougars with out the VSS pins :crazy:


Had to add them to the '87 harness that I installed in my TC... Came from a mid year car, Jan I believe...

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #12 –
Weren't the 20ths produced later int he run? Maybe they switched the harness late in the year?
88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, bunch of other stuff.

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #13 –
Not sure but I had issues till I hooked it up.87's don't have it.
Like I said it felt like big time valve float, just died and back fired.
Stop shut it off restart no problems. I thought it might of been the ignition switch, same ones still in though. ic you need to wire that if you read this.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +

92 Mark VII ECU ok to do a HO swap into an 88 5.0 T-bird?

Reply #14 –
Quote from: Cougar5.0;265332
'87 Cougar here - VSS equipped.

I know of 2 now that aren't . thats 87's. They need to tap the wires to the comp. 88's were wired.
Old Grey Cat to this.88 Cat, 5.0 HO, CW mounts, mass air, CI custom cam, afr165's, Tmoss worked cobra intake, BBK shorty's,off road h pipe, magnaflow ex. T-5,spec stage 2 clutch, 8.8 373 TC trac loc, che ajustables with bullits on the rear. 11" brakes up front. +