New Mod? TPS Adjustment

[Explor2Exped]

Not sure if everybody knew about this mod or not. I stumbled across this link & thought I'd share it with everybody.

http://fordtruckworld.tenmagazines.com/ew/forums/Topic.asp?id=429510&pos=1

Sorry guys if this has been mentioned before...

 

[Canadian Expy]

I don't think I have seen that mentioned before. but I think I might give it try. I kinda remember doing this on my 78F150 that I converted to a 5.0HO EFI. I think mustang guys do this. Nice find

 

[tsingson]

If anyone does tis please post pics and I will give it a try also...

 

[tonydiv]

This is really not a 'mod' it's just a calibration. Every sensor has a specific voltage that it should output. During production of the vehicle, and the sensor itself, they only get it to an 'acceptble range'.

It's just like blueprinting a motor, once you remove all the "close enough for government work' tolerances, real performance gains are realized.

 

[GAINMOB]

page saved and put on to do list

 

[SOLISIMO]

With my luck Id screw something up

 

[GAINMOB]

With my luck Id screw something up

i'll let you know how it goes...im shooting for next week...

 

[99 Expy]

Sweet, thanks for the link! I will give this a shot later this week!

 

[panda24619]

Sweet, thanks for the link! I will give this a shot later this week!

SAME! gotta try this. trying to squeeze every little bit of power out of this tank. just gotta go threw the link a little more. only read the 1st page.

 

[tmajikman]

just open up the holes enough to get the tps set to 0.98-0.99 volts.

 

[Tigster]

i'll let you know how it goes...im shooting for next week...

I am curious how it goes for you, I may do it next weekend.

 

[98EXPY 5-0]

I did this on my old Dodge Dakota. It helped with throttle response, but I'm not sure it added any power. I didn't read the link but I'm assuming you drill out the bushing and slot one of the holes to allow for adjustment? You have to be careful (at least on the Dodge) because too high a reading could cause a code. The gain is also dependant on how far from optimal it is anyway. If it's already close, you probably won't notice much change.

I actually got a TPS at the junk yard and modded that one. I kept the stocker in a baggy in my truck incase I had to swap it back.

Be sure to use a flat washer under the screw head so you don't crack the plastic since the bushing is gone.

 

[jjbusa]

kinda want to try this...

 

[walnuts4x4]

huh? dont know if I would do this but would love to see some results...

 

[tmajikman]

I did this on my old Dodge Dakota. It helped with throttle response, but I'm not sure it added any power. I didn't read the link but I'm assuming you drill out the bushing and slot one of the holes to allow for adjustment? You have to be careful (at least on the Dodge) because too high a reading could cause a code. The gain is also dependant on how far from optimal it is anyway. If it's already close, you probably won't notice much change.

I actually got a TPS at the junk yard and modded that one. I kept the stocker in a baggy in my truck incase I had to swap it back.

Be sure to use a flat washer under the screw head so you don't crack the plastic since the bushing is gone.

If you go too low or too high, your trans will shift funny as well as throw a cel code, the reason you set the tps to the .98-.99 volts is to get the tps to spec. It does not matter if it is for a chevy, dodge, or ford. The throttle position sensor tells the ecu among other computers in the vehicle what to do depending on its position at all times, be it idle, half, full or anything in between. When I had to install my new tps I had to make the holes bigger to get the voltage exact.

 

[Spooky]

I checked the TPS in my Crown Victoria and it was at .83 so I set it a .98. I had to drill out a lot of the brass bushing to get it to fit. I'll drive it tomorrow and see if there is any difference.

 

[akexpy04]

I am curious how it goes for you, I may do it next weekend.

Yeah, if you could pics would be great too. I'll probably do mine sometime soon as well. Heres what he did, i just copied, pasted and quoted him. However you call it back in school. Paraphrase or somethin like that

"February 22, 2006
The throttle position sensor is that small black plastic part with wires running to it that is connected to you throttle body. Now mine is different than yours because i'm supercharged but the principle is the same. I'll take some pics tomorrow and post them up. I'll explain what it does so you get the idea. You'll need a digital volt meter to check it and a screwdriver to adjust it. The optimim setting is .99 by loosening the 2 screws you can pivot the sensor ever so slightly. The object is to NOT exceed .99 although it usually comes from the factory way over that like 1.3 or under at .891 once you get it as close to .99 as you can the better the idle and response. It makes a world of difference. I'll post up some pics under TPS adjustment in my gallery.


Tools needed:

8mm socket & ratchet (to adjust idle set screw)

Phillips screw driver (to loosen TPS screws)

Multimeter (to measure TPS voltage)

Pins (to stick thru the insulation on the wires to the TPS) - optional

How to check your TPS voltage:

Turn key on, but don�t crank engine

Put positive lead of multimeter on grey w/ white stripe wire (middle wire)

Put negative lead of multimeter on grey w/ red stripe (bottom wire)

I used straight pins to poke through the insulation. You can also use them to back probe into the connector so as not to put holes in the wires.

You should get under .99 volts.. Anything over, and you'll need to adjust it.

Make sure you have your idle set where you want it by moving this set screw:

Tighten- increase idle

Loosen- decrease idle

Loosen the TPS screws slightly:

Turn the TPS clockwise to raise the voltage.

Turn the TPS counter clockwise to lower the voltage.

Move the TPS slightly, and check with the multimeter. When you get it to where you want it, tighten it back down.

My voltage was 1.01 before, and .983 after."
http://fordtruckworld.tenmagazines.com/ew/forums/Topic.asp?id=429510&pos=1

 

[tsingson]

i may be looking at the wrong thing but the 2005 doesnt look like it uses phillips screws for it and the wires arent the same color as the one he is describing....can someone verify this for me on their 2005 5.4?

 

[Spooky]

I dunno, I didn't notice any difference.

 

[tsingson]

Spooky, what tools did you use when you did this? which wires did you tap to check voltage?