Home Discussion Forum Tech Articles Other Articles Featured Rides Readers Rides Classifieds Shirts & Decals Parts Store

Ford Ranger Discussion Forum

Off-Road Truck Of The Month

'PlumCrazy'
October 2014 OTOTM

Mini Truck Of The Month

'Ted R.'
October 2014 MTOTM
 

Go Back   The Ranger Station Forums > Bulletins (Welcome, News/Announcements, Problems & Submissions) > Submit Info For Technical Articles > Submission Archive

Notices

Submission Archive Information that has been submitted and placed in either the Tech Library or On-Line Magazine.

Reply
 
Thread Tools Display Modes
Old 11-20-2009, 03:07 PM   #1
creepinjeepster
Member
 
creepinjeepster's Avatar
 
Join Date: Oct 2009
Location: Radcliff, Kentucky
Posts: 250
Vehicle Year: 1990 and 1991
Vehicle Make: Ford
Vehicle Model: Ranger XLT Supercabs
I use this vehicle for: DD's
Rep Power: 11
creepinjeepster is on a distinguished road
Send a message via Yahoo to creepinjeepster Send a message via Skype™ to creepinjeepster
Lightbulb HOW TO: Adjust TPS Sensor Ford Fuel Injection models

Throttle Position Sensor (TPS)

The throttle position sensor is mounted on the end of the throttle body and tells the computer how far open or closed the throttle is. The TPS is pretty easy to understand how it work�s, it is a potentiometer just like your dimmer switch in the dash. Voltage is fed to the TPS by the signal return circuit. As the throttle is opened the TPS directs more voltage to the EEC and less down the voltage reference circuit. All of the following items will affect the TPS:

•Throttle Cable
•Throttle Body Cleanliness
•Vacuum leaks
•Air Filter
•Air Filter to Throttle Body Duct
•Engines general condition
•Harness and wire general condition

The TPS sensor has a great deal of influence on the fuel ratios and timing curves, because the TPS is a user interface sensor. The TPS is the closest thing you have to a phone call into EEC. EEC listens to your every command from the TPS. There is a TPS ratchet algorithm which continuously seeks the minimum throttle angle corresponding to a CLOSED THROTTLE position. This alleviates the necessity to set the throttle position sensor at an absolute position and compensates for system changes and differences between vehicles.

•Closed Throttle can be anywhere between 0.6-1.0 volts
•Part Throttle is triggered @ 0.04 volts above Closed Throttle
•Full Throttle is triggered @ 2.71 volts above Closed Throttle



Before testing the TPS or any other EFI component perform a self-test, trouble codes received during test can be used as a diagnostic tool along with other indicators. To test the TPS sensor you will need a volt meter. You need to back probe the harness while reading the voltage between the TPS and SIG RTN pins. The exact voltage you get at any one point is not of major concern; instead you need to watch for a smooth increase in voltage as the throttle is moved. A TPS that does not give a steady increase in voltage as the throttle is moved is faulty and needs to be replaced. Also check for mechanical problems associated with the throttle. Throttle linkage and cable can bind up, keeping the throttle from opening correctly. Some times the idle stop screw has been adjusted, this adjusts the base idle and moves where the TPS closed voltage. The TPS should not need adjustment, but once the idle screw has been tampered with, the TPS should be adjusted to match. If the idle is low and the TPS is high lots of problems will appear. If you need to grossly modify the TPS mounting holes to adjust Closed Throttle between 0.6-1.0 volts, you should recheck the idle stop screw first.



Throttle Position Sensor
Rotational Angle Signal Voltage
0 Under Travel 0.000
10 0.450
13 Closed Throttle 0.901
20 - 1.440
30 1.900
40 2.370
50 2.840
60 3.310
70 3.780
80 4.240
84 Full Throttle 4.538
90 Over Travel 4.538
100 5.00
Values were calculated for VREF = 5.0 volts.
These values may vary 3 percent due to sensor
and VREF variations.

Aditional INFO: These are other things that can be found about Ford Fuel Injection........
EEC Computers
Strategies
Sensors
Actuators
Engine Load
Begining an EFI Swap
Magazine Articles
EFI Performance
EFI Tools
How to Solder
Wire Harnesses
Wire Gauge guide
How to run a Self-Test
2 Digit Self-Test Codes
3 Digit Self-Test Codes
EEC Program Codes
EEC Vehicle Locations
Tech Articles
Abbreviations
Reference Books

At this site listed below.....
http://www.fordfuelinjection.com/?p=1

Last edited by creepinjeepster; 11-20-2009 at 03:11 PM. Reason: Aditional INFO.
creepinjeepster is offline   Reply With Quote
Forum Notices (Not shown to 'Premium Members')

 Reminder:

 We're looking for participants to help move our banner from Alaska to Florida: Click HERE.

 Click HERE to see the banner map.

 Want to become a Premium Member & not see these notices? Click HERE.

Want your truck considered for Truck Of The Month? Click HERE.

Don't forget to vote!

Old 11-20-2009, 03:12 PM   #2
creepinjeepster
Member
 
creepinjeepster's Avatar
 
Join Date: Oct 2009
Location: Radcliff, Kentucky
Posts: 250
Vehicle Year: 1990 and 1991
Vehicle Make: Ford
Vehicle Model: Ranger XLT Supercabs
I use this vehicle for: DD's
Rep Power: 11
creepinjeepster is on a distinguished road
Send a message via Yahoo to creepinjeepster Send a message via Skype™ to creepinjeepster
Default

I hope all this info can be helpful to many others as it has been for me. It's a really good site.
creepinjeepster is offline   Reply With Quote
Old 08-04-2010, 07:33 PM   #3
Jim Oaks
Building another truck



 
Jim Oaks's Avatar
 
Join Date: Aug 2000
Location: Salem, Ohio
Posts: 6,735
Vehicle Year: 1983 & 1996
Vehicle Make: Ford
Vehicle Model: Ranger
I use this vehicle for: Dedicated trail rig!
My credo: Happy wife, happy life.
Rep Power: 10
Jim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond reputeJim Oaks has a reputation beyond repute
Default

used. thanks!
__________________
My mother thinks it's funny that I failed computer science in high school.




Vote For TRS In Top 4x4 Sites
Jim Oaks is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




All times are GMT -5. The time now is 12:10 AM.




1999-2014 / 959 Media LLC / All Rights Reserved