Why exactly does a TPS with a max range > 6K Ohms screw up high RPMs?
11-21-02, 10:18 AM
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Why exactly does a TPS with a max range > 6K Ohms screw up high RPMs?
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?
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?
11-21-02, 12:48 PM
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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
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
11-21-02, 01:32 PM
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Originally posted by dcfc3s
Who knows? All you need to know is the input is wrong and it needs to be fixed.
Who knows? All you need to know is the input is wrong and it needs to be fixed.
Originally posted by dcfc3s
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.
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.
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
11-22-02, 01:17 AM
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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???
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???
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