5

It just doesn't work, as if I weren't even pressing it and it happens regardless of the speed. I have to turn the engine off and on again and it'll work for another 3 or even up to 20 minutes sometimes before failing again.

I've changed the oil and gas filters and all the four spark plugs, as well as the oil. I've also cleaned the injection system and the problem is still present. I use unleaded fuel only at 88 octanes.

By the way the catalytic converter notice led is always turned on, and it only turned off like 2 minutes after I changed the sparks and it hasn't turned off since.

My car is a German Chevrolet Corsa 2002.

Edit:

I've just noticed that the revs get stuck right at the moment the issue occurs. i.e. if I'm driving at 90 Km/h and I shift gears, the pedal will stop responding and the revs will be stuck at ~2000-2500 until I apply the solution mentioned above (turning off an on the engine).

  • Have you checked the pedal itself, the throttle, and especially the throttle cable? – Josh Caswell May 25 '14 at 8:00
  • How can I check it? I know where it may be but I don't know how to look for failures. – arielnmz May 25 '14 at 8:05
  • 1
    Make sure the pedal itself moves freely. While you're down there looking at it, I believe you'll see a rod connected to it, passing through the firewall. The other end (in the engine compartment) should be connected to the throttle cable. The cable needs to be reasonably tight (spec for tightness should be in your repair manual), and not kinked or damaged. The end of the cable should connect to some kind of spring-loaded lever on throttle itself; check for free movement/good connection/general soundness there too. – Josh Caswell May 25 '14 at 19:11
  • Hello, I've checked the cables and connections and they seem to be ok, they're tightly inserted into their respective contacts, I've also used a continuity checker (while I moved the cables) but they aren't cut or anything. Also, this happens at around 15-20 minutes once on the road and it'll keep happening every 2-3 minutes. If I let it "rest" then it will last around another 15-20 minutes before starting to fail again. – arielnmz May 27 '14 at 5:36
3

I'm betting your Corsa is Drive-By-Wire (DBW), meaning, there isn't a direct connection between you and the throttle. If so, the gas pedal rheostat is probably telling the computer you are pressing it, causing the throttle to go up and in some cases not respond at all. You could possibly test the gas pedal by unplugging it and checking for even/smooth operation by putting an ohmmeter on the leads. You may also try tromping on it a couple of times with the engine off. If you want to send reset the CPU, you need to let it sit for ~30 mins to ensure the residual power is gone. This is the first thing I would have tried as well.

  • Thank you, I'll try it ASAP and will comment the results. – arielnmz Aug 10 '15 at 16:39
2

With the car off, go under the hood and look near your air filter housing. Follow the large hose that it is connected to until you see the throttle body. Try manually moving the throttle lever. This is what your gas peddle would do anyways.

Also try using two people, one to be in the car pressing the gas peddle, and one to see it the lever rotates at all. If all checks out, investigate your throttle position sensor. The TPS can be a cause of engine stalling while driving or idling.

  • I suspect this is the issue, but please read my updated question. – arielnmz Aug 17 '14 at 7:51
1

I had the same issue. My 2005 Vibe would always start, but would only run at low idle and depressing the throttle had no effect. There was no acceleration from the engine. Checking the fuses, I found the 10A fuse for the throttle control module TCM was blown. I replaced the fuse and it works fine.

I realise its not exactly the same problem, however it has the symptoms above and is pointing to the throttle control module as causing the issue.

protected by Community May 31 '18 at 0:38

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