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Omega Help Area => Omega General Help => Topic started by: C20det on 17 September 2015, 19:55:36

Title: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 19:55:36


Throttle sticking on but not when TC is off

Anyone encountered this problem before and know what it might be?

Cheers, Carl
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 17 September 2015, 20:05:47
Traction control working as it should...

Perfectly normal ::)

Stop driving like a tw at, and the ecu won't keep cutting the fuel ;D
Title: Re: Throttle sticking on but not when TC is off
Post by: Lazydocker on 17 September 2015, 21:18:46
I read this that throttle is sticking on, I.e. High revs, but not with TC on... Total opposite to the above comment  :-\
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 17 September 2015, 21:37:18
My bad... appears I completely misread that :-\

But given the throttle is electronic and TC cuts the fuelling (as well as triggering the rear ABS) I don't see how turning the TC OFF would prevent the throttle sticking open, as throttle control would remain the same... the difference being that with TC disabled, it would have no fuelling over ride to the ecu.

If it is indeed sticking open TC off, then I would be looking closely at the ABS to Engine ecu wiring.
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 22:37:33
When I get into it each morning to go to work if I where to rev it up to say 3-4k then change gear it would stay at them same revs and so on but I've notice that if I turn the traction off It doesn't do it at all its like as if crusie control is stuck on because the revs always stay the Same, they never go up or down.

Very strange it's only started doing this it was driving perfectly okay
Title: Re: Throttle sticking on but not when TC is off
Post by: GastronomicKleptomaniac on 17 September 2015, 22:40:42
Does it have cruise control?
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 22:44:50
It doesn't need to be high revs for example I'm driving along the carriageway at a steady pace with the traction control OFF at around 50mph @ 3000rpm  and I turn the TC back on I would be able to lift my foot off the throttle pedal & it would continue to travel at that same speed until I either press the brake pedal or turn off TC again,
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 22:47:46
Yes it does but the fella I brought it from told me that he had took the stalk out of it because something was interfering the with it but I can't remember how, there is a non cruise control standard stalk on it from I bought it .
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 22:50:37
I think he mentioned something about the clutch pedal interfering with the cruise control that's why he changed the stalk, as far as I can remember

Title: Re: Throttle sticking on but not when TC is off
Post by: GastronomicKleptomaniac on 17 September 2015, 22:52:02
I think he mentioned something about the clutch pedal interfering with the cruise control that's why he changed the stalk, as far as I can remember

If clutch switch still present, try unplugging it and see if it makes any difference?
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 17 September 2015, 22:56:50
Okay will have a look in the morning, 

Thanks
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 18 September 2015, 06:16:06
Would it be churlish to ask what codes are present, if any... ::)
Title: Re: Throttle sticking on but not when TC is off
Post by: Andy H on 18 September 2015, 08:32:07
It would make sense if switching TC off also disabled cruise control. The fact that someone has previously removed the cruise stalk makes me suspect that there is a short circuit (perhaps intermittent) in the wires to the cruise switches which is setting cruise when it is not wanted :-\
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 18 September 2015, 08:37:17
Being Plod, if cruise is fitted, then it is unlikely to be factory... Needs activating with Tech2 to work properly, and if "My Naff Code Reader" has been used on it then all bets are off... ::)
Title: Re: Throttle sticking on but not when TC is off
Post by: Steve B on 18 September 2015, 09:28:55
Being Plod, if cruise is fitted, then it is unlikely to be factory... Needs activating with Tech2 to work properly, and if "My Naff Code Reader" has been used on it then all bets are off... ::)
They wont let you enable cruise on the 3.2
Title: Re: Throttle sticking on but not when TC is off
Post by: aaronjb on 18 September 2015, 10:05:53
It would make sense if switching TC off also disabled cruise control. The fact that someone has previously removed the cruise stalk makes me suspect that there is a short circuit (perhaps intermittent) in the wires to the cruise switches which is setting cruise when it is not wanted :-\

That's where my money would be.. Cruise is effectively 'stuck on'. Although I never tried the TC button with the cruise enabled to see if it also disabled cruise. Anyone with cruise able to test that for the OP?

To the OP: If you brake do the revs also drop? (As we know the clutch and brake should both disable cruise)
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 18 September 2015, 10:28:30
It would make sense if switching TC off also disabled cruise control. The fact that someone has previously removed the cruise stalk makes me suspect that there is a short circuit (perhaps intermittent) in the wires to the cruise switches which is setting cruise when it is not wanted :-\

That's where my money would be.. Cruise is effectively 'stuck on'. Although I never tried the TC button with the cruise enabled to see if it also disabled cruise. Anyone with cruise able to test that for the OP?

To the OP: If you brake do the revs also drop? (As we know the clutch and brake should both disable cruise)
Will try that later Whilst drifting around Asda car park on my way home...
Title: Re: Throttle sticking on but not when TC is off
Post by: aaronjb on 18 September 2015, 10:30:15
 ;D Now I know how you bent that wishbone, Al. Your secret is out!
Title: Re: Throttle sticking on but not when TC is off
Post by: STEMO on 18 September 2015, 11:57:14
It sounds to me as if TC is switching cruise on off. Either an electrical fault..or a Terbs fault.
Title: Re: Throttle sticking on but not when TC is off
Post by: Kevin Wood on 18 September 2015, 14:30:11
TC wiring is often butchered on plod cars, so makes me wonder if that's somehow been confused with cruise wiring on replacement?

On a DBW system, throttle movement and pedal movement are monitored by 2 separate systems on each. If the throttle is remaining open when the pedal is released, it's because the ECU is doing it deliberately for some reason, otherwise it would revert to limp mode and log a fault code.

Something is triggering the cruise control, IMHO. Even more likely as the cruise stalk has been removed and there could be cruise wiring floating around behind the dash shorting to something.
Title: Re: Throttle sticking on but not when TC is off
Post by: 05omegav6 on 18 September 2015, 15:50:23
Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...
Title: Re: Throttle sticking on but not when TC is off
Post by: Andy H on 18 September 2015, 15:55:51
Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...
Would the run-lock only maintain a normal idle? or could it be used to set a fast idle to spin the alternator fast enough to drive all the flashing lights?
Title: Re: Throttle sticking on but not when TC is off
Post by: Lazydocker on 18 September 2015, 16:10:33
Cruise switch wouldn't have originally been present... Could potentially be a dash out job to find the short between the cruise and Tc looms...

Mine had cuts on the brake switch loom, handbrake loom and two additional feeds for the ignition switch for the runlock, and cuts in the TC loom to the switch...
Would the run-lock only maintain a normal idle? or could it be used to set a fast idle to spin the alternator fast enough to drive all the flashing lights?
Normal idle only... Not a PTO ;)
Title: Re: Throttle sticking on but not when TC is off
Post by: C20det on 29 September 2015, 20:58:33
I did get a throttle position /switch circuit malfunction code & I erased it hasn't returned. The only other codes I'm getting is the 02 Sensor heater circuit open (bank 1 sensor 1) & bank 2 sensor 1

Codes

0135-4
0135-8
0130-4
0150-4

Intermittent

Witch I still can't get to the bottom off  :-\