Go Back   Performance Probe Forum > Miscellaneous > How-Tos

How-Tos Post 'how-to' tutorials for all models and years of Probes. Instructions for maintenance tips, modification procedures, diagnostic routines, etc.

Reply Please read Forum Rules Before Posting
 
Thread Tools Display Modes
Old September 22nd, 2004, 11:22 pm   #1
dman446
  
Member
 
dman446's Avatar
   

Location: OK, USA
 
Join Date: Oct 2002
Vehicle: 1991 Probe GL

Posts: 107
dman446 is on a distinguished road


Trader Rating: 0 (0%)

Default Tune your TPS sensor....

A lot of people are not aware you can check and test yout TPS sensor. From the factory they just slap the things in the TB and dont bother fine setting them. Tunning your TPS to optimum voltage can help increase throttle reponse, HP, and fuel economy.

Tools Needed:

1. A good volt ohm meter (prefereably a digital one)
2. Philips Screwdriver or Torx bit driver (depending on what screws your TPS has on it
3. A drill and different size bits.

Procedure:

1. First we test to see what voltage is present in current condition. Turn the key to the on/run position - Do not start. Take the volt ohm meter and apply proper ground to ground lead and use positive probe to check the voltage on all 3 of the TPS wires. You are looking for the output signal wire that should read around or less than one volt. With the probe in place you can use your hand to rotate the throttle and see it the voltage climbs.

2. Now that you have located the output signal wire, make note of the voltage shown with throttle in home position. The optimum voltage for the TPS in home position is 0.96V DC.

3. Turn off key. If you sensor is not in this range (IE 1.01V or 0.89V) remove wire connector, and screws to remove TPS. The sensor itself has a spring loaded disc on the inside of it. So when removed from TB it may turn a bit.

4. Take your drill and drill the bolt holes in the sensor just a bit larger than they currently are. Be VERY carful as this is soft plastic and may chip or crack easily. *NOTE* Sometimes there is enough play just losening the screws to set voltage that drilling is not necessary.

5. Now that you have rounded out the holes, replace the sensor and replace connector and screws. Do not tighten screws all the way at this point. You want them snug but where the sensor can be shifted. Turn on key again. Check voltage on Output wire. Now adjust the sensor ever so slightly in eaither dirrection untill it reads 0.96V. Hols sensor in this position and tighten the screws. Recheck voltage. You may have to do this a few times if tightening the screws shifts the sensor a bit.

6. Once it is set and tightened, your done.

*NOTE* This procedure works on most Ford make and model vehicles. It may also work on other makes. Hope this may be useful to those who may be like me and are very particular about dead on tunning.

Good Luck,
Dan
__________________
DMan446

91 GL
K&N Cutom Intake
Reverse Indiglo Guage Faces
MSD Blaster 2 Coil
15W H.I.D. Lights

Last edited by dman446; September 22nd, 2004 at 11:26 pm.
dman446 was last online September 27th, 2004 7:37 pm  
  Reply With Quote
Old September 23rd, 2004, 12:15 am   #2
Paul
  
Super Moderator
 
Paul's Avatar
Paul is Male     Hot Topic Group Member 

Location: Green Bay, WI
 
Join Date: Jan 2003
Vehicle: 83 RX-7, 95 Dodge 3500 dually (Cummins), 99 Dodge 1500 4x4, 2005 Acura MDX, 88 Larson, 2.5 89PGTs

Posts: 6,281
Paul will become famous soon enough


Trader Rating: 7 (100%)

View Paul's Garage
Default

Nice dman446, what do you think about putting this in to How-to Forum so it's a more permant fixture?
__________________
"Auto Racing, Bull Fighting, and Mountain Climbing are the only real sports... all others are games."
Ernest Hemingway
Paul was last online April 24th, 2014 7:30 pm  
  Reply With Quote
Old September 23rd, 2004, 1:15 am   #3
Robert 89 PGT
  
Junior Aficionado
 
Robert 89 PGT's Avatar
   Hot Topic Group Member 

Location: USA
 
Join Date: Aug 2003
Vehicle: 89PGT, 05 G35 6MT coupe

Posts: 5,039
Robert 89 PGT is on a distinguished road


Trader Rating: 7 (89%)

View Robert 89 PGT's Garage
Default

im guessing that by ohm-volt meter u mean multi-meter?? .. nice write up.. ill check mine (ill have 2 borrow a meter from school bein as i dont have one @ home )
__________________
Robert 89 PGT was last online December 25th, 2007 12:55 am  
  Reply With Quote
Old September 23rd, 2004, 1:30 am   #4
dman446
  
Member
 
dman446's Avatar
   

Location: OK, USA
 
Join Date: Oct 2002
Vehicle: 1991 Probe GL

Posts: 107
dman446 is on a distinguished road


Trader Rating: 0 (0%)

Default

Ok, I posted it over in How-To's. Yes a multi meter. Referred by different names by different people.

Thus far I have performed this on 3 vehicles with success.

1. 01 Explorer Sport
2. 95 Escort LX
3. 91 Probe GL

Wish I could be more exact about which of the 3 wires it the sig-output, but cant seem to find my manual. Plus it may differ on different models.

For those who perfome this, please feel free to list your BEFORE voltage. Just to show others how much it can vary from the factory.

on the Explorer it was at 1.014V, I forget what the other two were exactly but they were under 0.96V.
__________________
DMan446

91 GL
K&N Cutom Intake
Reverse Indiglo Guage Faces
MSD Blaster 2 Coil
15W H.I.D. Lights

Last edited by dman446; September 23rd, 2004 at 1:34 am.
dman446 was last online September 27th, 2004 7:37 pm  
  Reply With Quote
Old September 23rd, 2004, 5:58 am   #5
Steve
  
Administrator
 
Steve's Avatar
Steve is Male     Hot Topic Group Member 

Location: Richmond, Virginia
 
Join Date: Apr 2002
Vehicle: 1992 Probe GT, 1997 Ford Aerostar XLT, 1999 Ford Taurus SE Wagon

Posts: 10,059
Steve will become famous soon enoughSteve will become famous soon enough


Trader Rating: 21 (96%)

View Steve's Garage
Default

Nice job.

Rather then having two posts with the same info, I deleted one and moved this over to the How-Tos forum.
__________________
Steve
Ship Captain
Performance Probe
 

The French are always reticent to surrender to the wishes of their friends and always more than willing to surrender to the wishes of their enemies.
-Dennis Miller
Steve was last online August 25th, 2014 5:09 pm  
  Reply With Quote
Old September 26th, 2004, 3:03 am   #6
exit
  
Intermediate Member
 
exit's Avatar
   Hot Topic Group Member 

Location: Miami
 
Join Date: Feb 2003
Vehicle: 1995 Probe GT MTX

Posts: 894
exit is on a distinguished road


Trader Rating: 0 (0%)

Default

Not exaclty sure why you drilled a hole into the TPS...

The FORD manual says the spec should be between 0.5 and 1.0 volts.
Usually the wire that you are looking for is the 2nd wire and is the color Yellow....

What you can do to "tune it" is unscrew the TPS and move it within .50 volts and 1.0 volts... all cars are tuned better at differnt voltage...

i think mines runs best at .68 or so... i forgot

But if your really into performance... check to see what the voltage before you start it... write it down... then lower or increase the voltage by moving the TPS.... adjust it by .03 or .04 ... take it for a spin... Is it running better? lower or increase it more untill you finally find the best setting
__________________

www.sflcarclubs.com - SFLPoc `95 Red Probe GT
exit was last online July 4th, 2005 4:23 am  
  Reply With Quote
Old September 26th, 2004, 12:34 pm   #7
dman446
  
Member
 
dman446's Avatar
   

Location: OK, USA
 
Join Date: Oct 2002
Vehicle: 1991 Probe GL

Posts: 107
dman446 is on a distinguished road


Trader Rating: 0 (0%)

Default

Quote:
Originally Posted by exit
Not exaclty sure why you drilled a hole into the TPS...
Not drilled into the sensor. Just rounding out the bolt holes if they are not large enough to give enough movement for adjustment.

Thats correct, between .5 and 1.0 volts. And every car may tune different, but .96 has proven to be the best all around setting. I got this information from a another ford forum.
__________________
DMan446

91 GL
K&N Cutom Intake
Reverse Indiglo Guage Faces
MSD Blaster 2 Coil
15W H.I.D. Lights
dman446 was last online September 27th, 2004 7:37 pm  
  Reply With Quote
Old September 27th, 2004, 5:49 am   #8
exit
  
Intermediate Member
 
exit's Avatar
   Hot Topic Group Member 

Location: Miami
 
Join Date: Feb 2003
Vehicle: 1995 Probe GT MTX

Posts: 894
exit is on a distinguished road


Trader Rating: 0 (0%)

Default

Quote:
Originally Posted by dman446
Not drilled into the sensor. Just rounding out the bolt holes if they are not large enough to give enough movement for adjustment.

Thats correct, between .5 and 1.0 volts. And every car may tune different, but .96 has proven to be the best all around setting. I got this information from a another ford forum.
i doubt .96 is the best all-around setting.....

All cars respond differntly.... alot of it having to do with the mods performed on a car as well.... (or at least i suspect)
__________________

www.sflcarclubs.com - SFLPoc `95 Red Probe GT
exit was last online July 4th, 2005 4:23 am  
  Reply With Quote
Old September 27th, 2004, 2:22 pm   #9
marshall
  
Intermediate Member
 
marshall's Avatar
   Hot Topic Group Member 

Location: Knott
 
Join Date: Aug 2004
Vehicle: 93 ford probe/ 00 chevy malibu

Posts: 543
marshall is on a distinguished road


Trader Rating: 0 (0%)

View marshall's Garage
Default

Do you mean dvom digital volt ohm meter??
marshall was last online December 8th, 2006 6:35 pm  
  Reply With Quote
Old September 28th, 2004, 1:54 am   #10
exit
  
Intermediate Member
 
exit's Avatar
   Hot Topic Group Member 

Location: Miami
 
Join Date: Feb 2003
Vehicle: 1995 Probe GT MTX

Posts: 894
exit is on a distinguished road


Trader Rating: 0 (0%)

Default

Quote:
Originally Posted by marshall
Do you mean dvom digital volt ohm meter??
multi-meter... w/e you wana call it... they are cheap at radio shack...

the point is for it to measure volts
__________________

www.sflcarclubs.com - SFLPoc `95 Red Probe GT
exit was last online July 4th, 2005 4:23 am  
  Reply With Quote
Old December 6th, 2005, 8:59 am   #11
T3F2T
  
Banned
   

 
Join Date: Dec 2005
Posts: 43
T3F2T is on a distinguished road


Trader Rating: 0 (0%)

Default

I really hope none of you have followed this poor advice. The correct way to "tune" your TPS is with a special service tool and a multimeter. First you need to understand that a throttle position sensor SST is used to check voltage at the various terminals of the sensor itself. The OE Mazda SST looks like this:



And to my knowledge isn't available for sale to the public, or costs an arm and a leg if it is. The SST plugs from harness plug to harness plug and leaves three pigtails like so:



So how to make one you ask? Easy, go to the junkyard and pull an extra harness from any 2.2 MX6 or Probe. It looks like this:



Make sure to leave yourself as much wiring as possible ^^^^

The harness has three wires on each side. Red, black, and white comes from the TPS sensor itself. The engine harness side has three green wires, green/red, green/yellow, green/white. Green/red stays with red, green/yellow goes with black, green/white goes to white but ends up being the blue wire.

Things you'll need:
Wire cutters
18 guage red, black, blue wire
3 female ends
A soldering irons and solder
Electrical tape.

Start by trimming all of the ends:



Unplug the harness from each other and turn wires towards each other. Red stays with green/red, black stays with green/yellow, white to green/white becomes a blue wire:



Solder each keeping in mind that the red, black and white wires from the TPS are thin wire and subject to breaking rather easily.



Make sure you secure the wires before finalizing. I bent the green wire from the harness rather than from the TPS sensor. The TPS senor wires are very brittle and fracture easily like I said previously.



Do the same with all three wires and finalize with electrical tape. Red to red/green, black to yellow/green, white to green/white and connect to blue.

Now how do you use this damn thing? Glad you asked!

Connect the sensor harness and turn the key to on, measure voltage at red, black and blue with the throttle plates closed. Write these numbers down and cross reference with the set values for each number you're givin for red vs blue. Do the same with the throttle plates open and adjust accordingly by the two 8mm nuts on the TPS sensor. This procedure is hardly difficult but does leave plenty of room for error if done incorrectly.

Here are the shop manual scans:







And that is the correct way to do it!!!!

Last edited by T3F2T; December 6th, 2005 at 9:07 am.
T3F2T was last online June 8th, 2006 8:05 pm  
  Reply With Quote
Old December 6th, 2005, 12:03 pm   #12
chino9656
  
Elite Enthusiast
chino9656 is Male     Hot Topic Group Member COPOC Member
Colorado Probe Owners Club 

Location: Salt Lake
 
Join Date: Apr 2005
Vehicle: Red 91 PGT, parted, Gold 89 PGT, fast:)

Posts: 4,862
chino9656 is on a distinguished road


Trader Rating: 8 (83%)

View chino9656's Garage
Default

wow....i'm so tired right now, but you did something pretty cool, and in the morning I'll figure it out!
I didn't quite follow ur instructions...too many green wires and stuff, but thanks for clarifying everything here...I was just reading about the longer screw mod and people saying you would need to adjust the tps, then you do this! thanks
chino9656 was last online July 13th, 2011 8:54 am  
  Reply With Quote
Old December 7th, 2005, 2:48 am   #13
pin
  
Intermediate Member
 
pin's Avatar
pin is Male     

Location: Langdon, ND
 
Join Date: Dec 2003
Vehicle: '01 Saturn SL2

Posts: 924
pin is on a distinguished road


Trader Rating: 10 (100%)

Default

There are sometimes multiple ways to do the same thing, especially in this case of doing the same task on different vehicles. The procedure described in the original post would work on my '92 Probe LX. I have a TPS for a different application and I had to set it like that.
__________________
Barry - '01 Saturn SL2
pin was last online February 23rd, 2012 12:46 am  
  Reply With Quote
Old December 7th, 2005, 9:10 am   #14
T3F2T
  
Banned
   

 
Join Date: Dec 2005
Posts: 43
T3F2T is on a distinguished road


Trader Rating: 0 (0%)

Default

If you want to "tune" your TPS, do it the way that I just posted rather than going by his method where he says 0.96V is "optimum". Notice that 0.96V is not contained anywhere in the shop manual for OUR cars, and that .60V is the highest stated. Going by his method would throw all of the other values off and be "tuning by guesswork" which isn't "optimum" at all.

If you don't understand it, read it again. I understand that some of the numbers and writing may be hard to see, but I posted it as good as I could taking pictures from the manual.

FYI- The pictures are directly from the Mazda workshop manual.
T3F2T was last online June 8th, 2006 8:05 pm  
  Reply With Quote
Old December 7th, 2005, 2:04 pm   #15
shard phoenix
  
Junior Enthusiast
 
shard phoenix's Avatar
   Hot Topic Group Member 

Location: Heidelberg, GE
 
Join Date: Jun 2005
Vehicle: 2006 mustang GT

Posts: 2,169
shard phoenix is on a distinguished road


Trader Rating: 1 (100%)

Default

Quote:
Originally Posted by T3F2T
If you want to "tune" your TPS, do it the way that I just posted rather than going by his method where he says 0.96V is "optimum". Notice that 0.96V is not contained anywhere in the shop manual for OUR cars, and that .60V is the highest stated. Going by his method would throw all of the other values off and be "tuning by guesswork" which isn't "optimum" at all.

If you don't understand it, read it again. I understand that some of the numbers and writing may be hard to see, but I posted it as good as I could taking pictures from the manual.

FYI- The pictures are directly from the Mazda workshop manual.

Their is absolutely NOTHING wrong with doing this with a DVOM, the results are adequate, and this procedure is acceptable via industry standard.

Everyone sets their TPS to a different voltage based on their needs and driveing habits, I set mine at .72 and find this to be ideal, there is not a specific value that will always work best, and every car will be different. This is a good write up, do some research before you attack someones hard work.
__________________
Its a Secret!!!
shard phoenix was last online April 28th, 2010 7:42 pm  
  Reply With Quote
Reply

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 On

Forum Jump


All times are GMT +1. The time now is 6:59 pm.

 

Powered by vBulletin® Version 3.8.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
©2000-2014 Performance Probe, Inc. All rights reserved.