I've been wondering for some time now if our trucks were equipped from the factory with some sort of speed limiter that some cars and trucks have to keep from going but so fast in them. I'm by no means wanting to see if my will do 140 and not kill me in the process but if I'm gonna be taking it up to a drag strip once I get the new engine in her I'd like to not be losing time because of something silly like that.

Thanks in advance as always, Shadow.

 

Nope no limiter in 1990. Except your right foot.

 

As I recall there is an RPM (REV) limiter of around 5,250 rpm.

AS to the speed limiter Eddiec1564 posted the following sometime back in post:
https://www.ford-trucks.com/forums/1...r-92-f150.html

"The "rev limiter/speed limiter" works like this: Just before cut off speed the ECU retards ignition timing and you start to loose power and slow down below the set point, then ECU resumes normal function. But as you keep pressing the throttle pedal, the next step the ECU takes is it alternate disable half of the injectors(bank fired EFI) or rotate disable injectors on sequential EFI. The next step after that is total fuel cutoff. As you slow down the ECU reverses that process.

As for turning off the speed info to the ECU in high gear(E4OD only) is will cause the tranny to possably downshift and cause major problems.

Few years ago, someone made up a circuit that would pass speed info properly, but when you hit the speed limit, the circuit would take over and feed the ECU a set speed like 75MPH or something. I lost that info and have not found it since. I recall that person used a PIC microprocessor to do the work..... "

 

Found the rev limitor one day for sure but I'm interested to know more about a bypass to it then for lets say a 5 speed Manuel? Is it as simple as just remove a sensor and have at it or am I missing something?