My 2001 Accent GS is about to drive me crazy. Sometimes when I depress the clutch, the revs remain the same. I understand that sometimes this is favorable and intended by the ECU. The problem is not only do the revs remain but sometimes they increase. I'll depress the clutch and roll to a stop while the revs remain at 2 grand, and then they begin to climb and sometimes hold at about 4 grand. If I goose the throttle, it will reduce to idle. Other times I may be maintaining a certain speed, say 40 MPH. I'll notice that my accelerator input is not necessary. I can let go of the pedal and the car will continue at that speed. It's kinda like involuntary cruise control. By the way, my Accent doesn't have cruise. Any ideas? It's one of those things that will invariably be impossible to reproduce if I take it to the dealer. Any help would be greatly appreciated.
That sounds like it could be a problem with the throttle position sensor (TPS). If you're comfortable getting your hands a little dirty, try disconnecting the wiring harness from the TPS and cleaning the contacts with a soft brush in case there's some corrosion that's causing a bad connection.
If that doesn't help, let us know.
Also, is the Check Engine Light (CEL) on?
BTW, I'm moving this to Help and Maintenance. I think this'll get more views there.
^^^ Good point, warranty coverage didn't even occur to me. The only issue is the tech being able to reproduce the symptom without having to keep the car for a week.
Although it's something that's becoming more frequent, I'm not sure they'll be able to reproduce it. I did check the TPS and it looks like no corrosion, but I cleaned it a little anyway. The problem with the shop too is that it's not exactly nearby. It may be in my best interest just to buy the part if it's not too expensive. Do you guys think it could be anything other than the TPS? I'd hate to replace it if it's not the culprit, but I know there's probably no better way to troubleshoot it than to replace it.
I'd check your IAC (Idle Air Control) it can be found near the throttle body. If you can't find it usually when the KOEO (key on engine off) you can hear something "Humming". A way to check it, if you car does "high idle" at a stop sign again (provided nobody behind you) open the hood and shake it back and forth and the idle should return to normal.
I just wanted to thank those who replied to my post. When I removed my TPS, there was some resistance. I noticed there was no resistance when I replaced it. In the last 100 miles, I have not been able to reproduce the problem. I suppose some grit may have found it's way in and was keeping it from operating smoothly. Regardless it's working fine now. Much thanks.
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Car revving without input
Linear Mode
