Ranger computers


Ranger Kip

Ranger Kip

15+ Year Member

⭐Supporting Member
U.S. Military - Veteran
Joined
May 2, 2010
Messages
2,942
Points
3,101
City
Wellsboro
State - Country
PA - USA
Vehicle Year
2006
Vehicle
Ford Ranger
Drive
4WD
Engine
4.0 V6
Transmission
Automatic
My credo
Confused and Intolerant
Would my 84 have one? If it does where is it, and what is it used for?

(2.8L stock v6)
 
its efi or carbed?

the ecu controls mostly the idle, fuel/air ratio, ignition and warm up idle rpms. for naming a few
 
I believe all 84's were carbed 2.8L
 
then it may not have a ecu.
i think it started in 84 tho. due to emissions and stuff
 
hmm, it does not surprise me.
 
it has a computer, but if you go duraspark you don't need it
 
what does the computer do?
 
controls your ignition system and carburator.

if you swap to a non-electric carb and a duraspark ignition you won't need it.
 
The computer on the 84 controls fuel mixture by a mixture control solinoid on the rear of the carburetor by referencing information it receives from the o2 sensor. It controls idle speed by a stepping motor mounted on the front left of the carb. It adjusts the timing relative to rpm and load on the motor. It also controls a fistful of vacuum solenoids that in turn control things like air pump, evap. etc. It's mounted behind the kick panel on the passenger side.
 
I think I will keep the system thats in it, if it still works after 233k, and no maintaince besides 2 new airfilters (including its original, it was washed out hundreds of times), etc. I think it will continue to do me well =)
 
Ranger Kip said:
what does the computer do?
Click to expand...

It will make your life miserable if everything is not working together. If your distributor has 6 wires it is controlled by the computer and advances/retards the timing and controls the air bleed to the carb. If your having trouble with it and need to pass emissions start with the basics check the wires connectors and grounds. Get all the vacuum lines run correct and look for and fix any vacuum leaks. Then run the codes dont be afraid to ask Qs. If you don`t have to pass emissions duraspark it either way all the info you need is in the tech library.
 
yea, id duraspark it too, what years do they stop requiring emisions testing on?
 
I believe the mid 70's and older vehicles are exempt. They were not built with Catyletic Converters, and that caused an issue in the 90's because a lot of older vehicles were declared illegal, until they exempt them from the emissions.
 
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