Skip to main content ↑ ↓
Topic: Bypassing "116"mph Lincoln EEC IV speed limiter... (Read 1908 times) previous topic - next topic

Bypassing "116"mph Lincoln EEC IV speed limiter...

Hey guys, I have a 91 Mark VII ecu in my car and with the new 3.73's when the speedo hits 116, I'm actually doing about 95.5mph.  This is not good because my best run at Atco was with a trap speed of 94.5mph(on 3.08 gears)...I don't want to hit the 1000' and have the car fall on it's face( fuel cut off)...I plan on going thurs night...I know it's easy, I just can't remember it...I'll probably crimp on some male/female spade connectors to whatever wire it is so I can just disconnect it at the track.

Thanks,
Don
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #1 –
Just disconnect (or cut) the VSS signal wire going into the ECM (dark green/white wire at terminal 3). Your best bet would be to install a switch so you can make or break the connection at will.
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #2 –
Schweet, thanks.  I like the switch idea better than my idea.
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #3 –
do you have a 5 speed?  If you do you dont need the VSS wire... trust me.
One 88

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #4 –
No, it's an aod...i've heard that without that wire connected it can cause stalling when coming to a stop, so having it on a switch would be optimum for me.  Make my run, turn the switch back on after my run and flip it off during my next run.
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #5 –
For the time you are at the track, I'm 99% sure the switch can remain off with no ill effects...

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #6 –
Quote from: TurboCoupe50
For the time you are at the track, I'm 99% sure the switch can remain off with no ill effects...


Yeah most likely...I've really been getting things done on my car and I'd like to continue that trend before I have to return to work on Wednesday...lol.  I'll let you know how it works out.
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #7 –
Well, I went to the track tonight...cutting that wire served it's purpose and I had no problems at all on the way home...drove 100% the same...for details my track outing see my thread in the "at the track" section.

Thanks,
Don
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #8 –
Yeah, cutting that wire definitely worked like a charm...I just had it up to 110 on the A.C. Expressway before having to slam the brakes due to traffic...speedometer was reading like 127.  transmission didn't know what to do...hopped from 3rd to OD like 3-4 times...lol.  I'll make another run of it sometime soon when traffic calms down.
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

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #9 –
yeah, im trying to put a little thought into that issue as well and wondering what could overcome the fact that you ran out of power due to the fuel / air.  Im curious about being able to manually increase the FPR to add just the bit more gas that might help on the top end. 
Of course the CFI systems came with stock adjustable FPR's.

or,,,,,,,,, after a few more runs,, lets see how that theory of your EEC learning works out,,lol
 

Bypassing "116"mph Lincoln EEC IV speed limiter...

Reply #10 –
Well the car really doesn't "run out of power" like I thought...my trap speed on my fastest run was a little lower probably due to the fact that I let the trans shift into 3rd when IT wanted to...all my other runs, I held it until around 5100rpm.  I had it up to 110 almost as soon as I was merging into traffic on the expressway...she moves...but I would like a few more top end ponies...adding more fuel pressure would probably just cause my trap speed to drop more.
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