Quick questions about TPS & TB stop *****...

[92BronK]

Could a bad TPS cause hesitation/sluggishness?

How would I adjust my Throttle Body stop *****? The previous owner told me he tried to "adjust the idle" so I know he messed with it.

Thanks Guys >

 

[BLADE262US]

Well if he messed with it its definately not right now . That ***** shouldnt be turned try to get it back to where it was by any marks on it showing that . Now to adjust the TPS there is a procedure that involes a volt meter . Go to fordfuelinjection.com and you should find the info on it I dont know the exact values off the top of my head . But how it works is theres a starting voltage input to the EEC at idle lets say 1 volt now with the throtle open all the way the input voltage is 12 volts ( these values are not correct values just an example ) now as you open and close the throttle the the voltage sweep to the EEC tells it where the throttle is and from there it knows by preprogrammed info how much air has entered the motor so from there calculates how much fuel to put with it to try to achieve the 14.7 to 1 fual air ratio . So if your starting voltage is too high the EEC will think it needs more fuel so it will be a rich condition and if its too low there will be a lean condition . I have been going to make a test harness to do this for awhile but havent had time . I do think you can order the plugs and make an extension that can be plugged in between the TPS and harness plug to give you a place to test the voltage . Its not as bad to do as it sounds . /emoticons/[email protected] 2x" width="20" height="20" />

 

[92BronK]

i wasnt tryin to adjust my TPS, I was wanting to know if I had a bad TPS would it cause hesitation/sluggishness? /emoticons/[email protected] 2x" width="20" height="20" />

 

[miesk5]

A bad TPS can be the cause of bad xCodes xthe EEC detects a TPS problem.

xeaner or TB xbe used to clean the sxsor. nevermind

 

[BLADE262US]

What I was getting at is if he moved that throttle plate stop ***** then he esentially adjusted the TPS so it is no longer correct . Thats why I directed you to fordfuelinjection.com so you could read the procedure on how to properly adjust it . The TPS is everything to the EEC . So instead of telling you how to check it I should have just said yes it will run very poor then waited for the next question /emoticons/[email protected] 2x" width="20" height="20" />

 

[Burns]

A friend of mine told me that when I had my oil pressure problem (after so long, it'd start dropping while sitting at a light or stop and try to stall the truck out), I could "bump the idle up" by tweaking the idle. He said the little ***** that dictated the idle, governor ****** could be turned using some needlenose pliers. I only bumped it up a hair, maybe a 1/4 of a turn, and it idles just a little higher, not really noticable, and the pressure stays high enough that it doesn't leak nor does it drop pressure (the stalling was because of an oil pressure sensor gone bad).

Probably not the best solution, but it worked for me. I can't see the harm uping the idle a little.

 

[92BronK]

What I was getting at is if he moved that throttle plate stop ***** then he esentially adjusted the TPS so it is no longer correct . Thats why I directed you to fordfuelinjection.com so you could read the procedure on how to properly adjust it . The TPS is everything to the EEC . So instead of telling you how to check it I should have just said yes it will run very poor then waited for the next question /emoticons/[email protected] 2x" width="20" height="20" />

Oh I gotcha /emoticons/[email protected] 2x" width="20" height="20" />

A friend of mine told me that when I had my oil pressure problem (after so long, it'd start dropping while sitting at a light or stop and try to stall the truck out), I could "bump the idle up" by tweaking the idle. He said the little ***** that dictated the idle, governor ****** could be turned using some needlenose pliers. I only bumped it up a hair, maybe a 1/4 of a turn, and it idles just a little higher, not really noticable, and the pressure stays high enough that it doesn't leak nor does it drop pressure (the stalling was because of an oil pressure sensor gone bad).Probably not the best solution, but it worked for me. I can't see the harm uping the idle a little.

My problem is that its idleing too high... It idles around 1000-1500 RPM

 

[Burns]

Ouch. Yea, I'd say that's not a good sign at all. A good pair of needlenose pliers and a COLD engine (I was a ***** and did it soon after turning it off, got a nice wakeup call when I went to grab the throttlebody to open it to get access...) and just back the ***** out. There's not much room, so each turn could be an 1/8 of a turn. And if at all possible, use a light grip, there's a spot you don't need to booger threads up in.

If you're wondering, you need to take the black cover off the throttle body (I just left mine off, it went on and off so much I just cut out the middleman) and underneath will be your throttle cable. If I think right, it'll pull towards you, and a little to the left (passenger side looking at it from how you would from the engine bay). Look under the plate, you should see the *****. There's no useable head, so no wrench, ratchet, or screwdriver will work. I can't remember if it's turn from top to bottom to lower throttle, or from bottom to top to lower throttle, but I *think* it's bottom to top. I'll grab a flashlight and my camera and snap a pic and try and post it for you so you have a better idea of what your looking for.

Hope this helps. B)

 

[Burns]

Sorry about the blurry pic, but I believe it's still readable.

 

[BLADE262US]

The whole idea of that ***** not having a useable head is so you dont adjust it . It is factory set throttle stop . What your acheiving by moving it could also be done the correct way by loosening the 2 screws on the TPS and rotating it right or left . If your backing the ***** out youd go to the left but still your guessing without a volt meter . You may get it to sit and idle but the driveability will not be right because the voltage signal from the TPS will more than likely be out of range . /emoticons/[email protected] 2x" width="20" height="20" />