bnehila i have the same problem with my SVO S/B. when i get on the throttle it will hold up at higher RPM's and somtimes not come down unless i turn the truck off. when i put the stock T/B on it runs perfect but still throws a lean code. i thought it might be a vacuum leak but can't find one either. im going to put the SVO back on now that i have a Predator and data log the TPS and other things that may help me figure out the problem.

i put the stock throttle body back on and sold the accufab. truck runs perfect now. i bought another stocker and im gonna port it. does anyone know what kind of gains a ported TBhas compared to the accufab or BBK.

took TPS off, now shows 0.00 when I re-installed it?
????what can be the problem, had .880 before???

How would I cure the surging on a 2004+ F-150 (5.4L 3v) (sorry to revive the thread but I'm incredibly frustrated and I've posted here to no availability.

If you try a search on accufab I think they had some throttleplates that needed to be adjusted to work right. They had a binding problem you needed to loosen the throttleplate (blades) screws to adjust. hope this helps!

Hey Guys,
After 2 days of defeat I'm ready to give up.
My motor had a surge to it @ idle. I checked and adjusted the TPS from 1.2 down to .997. I guess I forgot to tighten the lock nut around the idle screw and thats when everything went to the dogs. After driving 60 miles the idle worked its way up to 1300. I adjusted the set screw back down and made sure it was locked this time, re adjusted the voltage got it @ .997, disconnected the battery for 20 mins
Now the shift points are all off. What can I do to fix this?
Oh yeah I can only get 4.66 @WOT

.997 closed
4.66 WOT
700 rpm's @ idle
Big Thanks to BABOLT and Clonetek for the time spent on this thread so dummies like me can ask more questions

Thanks Guys
TC

Any ideas at all on what the problem is

I installed a FTVB and the shift points were really off. Found the TPS code. Didn't screw with it, got a new Motorcraft TPS for $38 and installed it. The readings were
.99 and 4.99. Went for a test drive and it drove like a new truck.

I've read all of the information everyone has written here about the TPS. I was told by a mechanic that the TPS is my problem. When I start my 98 F150 in the morning it kills unless I keep my foot on the gas. After one or two revs, or sometimes a few miles down the road it will begin to idle as it is supposed to. Out of 5 people asked, I received 15 different answers. Does anyone know if the TPS would be causing this problem? It sounds logical, but don't want to spend a few cents here and a few cents there, chasing my tail to only spend a few hundred and still have the same problem. If anyone can help or even point me in the direction to go it would be greatly appreciated.

Keith

all of the problems we have in this thread have to do with a single blade throttle body . Do you have an aftermarket TB?

so is .99 and under and 4.5-5.0 at WOT the specs for all cars and truck or just for the F150? If not where can I get the specs for other ford cars and trucks.

Lets keep this thread going