I was just wondering what happens that causes the high RPM range to mess up when a TPS has a full open range of greater than the spec 5K Ohms +/- 1k Ohms.

Mine works fine for most of its movement range, and sets to 1k Ohms at idle correctly, but when its fully extended (gas is floored) it reads ~16k Ohms, and I get high RPM bucking like I have read about on here before.

I have a new TPS on the way, but I was just curious as to what the computer actually does in these situations? Does it run the fuel too rich or lean, incorrectly handle ignition, or what?

 

Who knows? All you need to know is the input is wrong and it needs to be fixed.

Probably part of the reason you're having erratic behavior is when a TPS goes bad, the resistance isn't stable. It jumps all OVER the place. So, the ECU thinks you're doing all kinds of crazy stuff with the throttle when you're not.

Dale

 

True, That is all I "need" to know, and I am waiting for the new one to arrive in the mail to fix it.

I'm not sure if its simply an erratic thing though. When I tested my TPS out last weekend it was stable right up till close to the end of its extension range when it moved quickly from ~6k to ~16k. I have been getting dieback and stumbling when the pedal was floored (which would be TPS stable at 16k) and when it would climb above 6k RPMs.

No big deal anyway, fix it and everything should return to normal. I was just wondering if anyone had one go bad on them and noticed their A/F ratio meter going nuts or anything like that.

Thanks

 

All i know if your TPS is fux0rEd Anything above 6k,

What the hell, i didn't check my car for resistance i checked voltage!!!!!!!!! But i fixed mine!

 

YES.&nbsp WOT values over 6kohms can cause high RPM hesitations.&nbsp Replace it.


-Ted

 

not to barge in on your thread. but........

what if the stumble is throughout the RPM range beginning at 2-3k on up would this be also the TPS gone bad or out of adjustment???

 

Just out of adjustment.

Mine was needing some adjustment badly. So I adjusted it. so it was reading .95 volts at idle (after warmed up)