Weird TPS Issue

[cracka400]

95% of the time I lurk these forums and learn everything I can from you guys, but I got a small issue I can't seem to figure out. I've searched almost every 240 TPS issue on the site and everyone seems to have a little different problem. Ok, so here is mine. Back probing the middle wire on the TPS shows that I have 0.45 volts constant when I have the key in the ignition and motor off. Throttle closed shows that I am hitting 2.00 ohms. Now with throttle wide open I am peaking at 8.99 sometimes 9.12 ohms and no higher. Could this be that the sensor is shot or is getting bad? Any help is greatly appreciated.

[zach-Ka]

Well Jarrett.... I think this is an excuse for a blacktop....

[cracka400]

lol wouldn't that be nice.....and I do remember something about you saying you wished you had never got the sr

[ZOMG.SR20]

read the open and closed in volts then come back here and ill tell you if your tps is shot ohms doesnt do it for me...

[zach-Ka]

lol wouldn't that be nice.....and I do remember something about you saying you wished you had never got the sr

This is true... We should do a mad tyte KA24-E swap on that hoe!!! We have one sitting in the garage.

[zach-Ka]

Can anyone help the man...He has a 98 kouki that is slower than his stock KA-E coupe thats an auto...

[ZOMG.SR20]

replace the TPS done.

[cracka400]

If i'm not mistaking, if you convert ohms to volts you will end up with the same number. So if that is the case I would end up still at 9 volts when the throttle is wide open.

[zach-Ka]

So its the same man, Closed its supposed to be .45 to .55 volts.zerothread/161700

[cracka400]

Accelerator Pedal Condition Resistance in k OhmsCompletely released Approx. 2Partially released 2 -10Completely depressed Approx. 10

That .45 to .55 is when you back-probe the wire. The specs on that in my car are dead on but I can't seem to hit 10 volts.

[OutToWinPAHC]

just an FYI ohming out a RPS is not always accurate. Most of the meters out there have a slower capture rate and you can float over a dead spot and not even know. I suggest using an O-Scope and watching the curve on that. if you see any dips its not good.

I had this issue with my TPS on the LS, checked it with a very pricey fluke 289 multi, and it looked good. Hooked up my fluke 196C scope and it had a nice dead spot.

[cracka400]

Well I went back out there and adjusted it once more just to make sure those numbers were dead on and still wouldn't push past 9.00 volts. Strange thing is though I went for a drive and most if not all of the hesitation was gone. For future tests where would I pick up one of these O-Scopes?

[OutToWinPAHC]

I got a fluke 123 for sale. Brand new, MSRP 1400 selling for 1000... With that said you can borrow one, or junkyard a new sensor and see if it helps

[cracka400]

Wow yes after you said that about the O-Scope I did some research on it and they are pretty cool. But thanks for all of the help guys. It seems to be running 100% better than it previously was.

[zach-Ka]

sr>ka

[xX RB Xx]

your car is going to explode.

[Wc240]

If i'm not mistaking, if you convert ohms to volts you will end up with the same number. So if that is the case I would end up still at 9 volts when the throttle is wide open.

(nicely put) yes, your mistaken. next time, do those same readings in volts, no converting