Could my throttle position sensor be bad, my alternator, or something else?

[steve258]

2000 Jeep Tj, 4.0 driving in city, speed went up to 40 MPH without foot on the gas pedal, check gauges light came on, all normal except amps
jumped to and stayed at 19 amps. Replaced throttle position sensor. Ran OK for one day. The next day driving highway speed 50MPH and check
gauge light came on and amps again went to 19 amps. Reduced speed and check engine light went out. Now, afraid to drive anywhere.
Throttle position sensor or alternator or something else? Thanks in advance for any help.
P.S. Not a MoPar throttle position sensor replacement.

 

[Chris]

What brand of replacement throttle position sensor did you use?

 

[ItchyDong]

Can you explain to me how a TPS would make a voltage gauge spike? Also, it would really help if you would get the code that she's throwing.

 

[steve258]

Can you explain to me how a TPS would make a voltage gauge spike? Also, it would really help if you would get the code that she's throwing.

I have no clue but I thought it had to do with the TPS because it drove 40 MPH just as if the cruise control was on

 

[steve258]

I have no clue but I thought it had to do with the TPS because it drove 40 MPH just as if the cruise control was on

 

[Jerry Bransford]

Your Voltmeter going to 19 volts (not amps) could be caused by nothing more than a bad, loose, dirty, or corroded battery connection. A bad connection can fool the PCM into thinking the battery is low and raising the alternator voltage up to 19 volts trying to charge the battery.

Remove both battery connectors and wire brush both of the battery posts and the inside of the cable connectors. Reinstall them and make sure to get the nut on tightly enough to prevent the connector from being able to be moved around on the battery post with even considerable hand pressure.

 

[notnsuv]

Your Voltmeter going to 19 volts (not amps) could be caused by nothing more than a bad, loose, dirty, or corroded battery connection. A bad connection can fool the PCM into thinking the battery is low and raising the alternator voltage up to 19 volts trying to charge the battery.

Remove both battery connectors and wire brush both of the battery posts and the inside of the cable connectors. Reinstall them and make sure to get the nut on tightly enough to prevent the connector from being able to be moved around on the battery post with even considerable hand pressure.

..and treat the cleaned, shiny posts and connectors with battery terminal grease, red stuff made for that in paste or spray, Vasoline, or even Karo syrup. End corroded connections forever.

 

[Jerry Bransford]

..and treat the cleaned, shiny posts and connectors with battery terminal grease, red stuff made for that in paste or spray, Vasoline, or even Karo syrup. End corroded connections forever.

KY Jelly?

 

[ItchyDong]

I have no clue but I thought it had to do with the TPS because it drove 40 MPH just as if the cruise control was on

Negative. Big big negative.

 

[steve258]

Negative. Big big negative.

Thanks! So what should I be looking at?

 

[steve258]

Negative. Big big negative.

OK. So what should I be looking at? It wasn't on cruise control but maintained 40MPH without any input on the gas pedal?