Think your accel pedal position sensors bad? Think again.
So about 5 months ago I was getting major buck and dead spots on my throttle pedal and engine check lights. All sorts of fun. So assuming that my a.p.p. sensor or as most ppl cal them "TPS" was bad , I head to napa buy a new one. Well it lasted about a month. Then the same thing occured. It took me 3 tries with three different sensors. Junker dorman brand. So I took them in on warranty about 3 times and finally said I'd had enough. Luckily I kept my stock ford motorcraft sensor. So what I did was eliminated the IVS from the system. I removed it off the pedal assembly and mounted it right under the dash. So it is sort of an anti theft device also in a way. Because you can start the truck. But there's no throttle response until you find the switch and click it once. I've had it this way about 2 months. And its working great ! My truck is my daily driver. No problems at all. No buck. No check engine lights. Nothing. I'm planning on posting pics of the mod soon. But if nobody cares ill just leave the words to describe it no pics. I also forgot to mention that the throttle is smoother now then when I bought the bugger.
That's just a mechanical switch, not a magnet. Works like a brake light switch, or the light in the fridge. Tab that hits the plunger is right on the pedal arm; adjustment takes but a minute. But the "limp mode" idea is intriguing....
Pete in San Ramon
2005 F250 6.0 Lariat 4x4 CC Short bed (stock)
1997 F250 7.3 XLT 4X4 Reg. cab 1.0 housing Banks wheel AC injectors T500 Farmers Diesel pushrods Diamond Eye 4" exhaust DP F6 chip Electric fuel S@B intake
Just keep in mind that you have also defeated what is considered to be a safety feature. If your TPS were to go bad now, the truck would run away. It's probably not a huge deal for someone who knows the truck, but that switch is intended as a fail safe to override the TPS signal when you aren't pressing the pedal.
If it were me, I think I would just replace the IVS. They're not more than $20. If you wanted the "anti-theft" feature of it you could still do that by interrupting the signal to the IVS with a single pole switch and hiding it under the dash somewhere.
--Nate "Just a redneck geek"
1997 F-350 7.3 PSD, 4x4, CCLB SRW, 3.55's, ZF5
If it isn't under warranty, I'll fix it myself.
sorry to bring last week thread up, seems silly to start a new one.
would this fix, bucking at slow speeds, low throttle input? like crawling around a drive thru? my wife almost spilled her ice cream last night cause the truck lurched forward with very little throttle pressure. its only the second time its happened. thanks
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