Accelerating on its own

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jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Accelerating on its own

Postby jason_2801 » Wed Nov 16, 2011 3:18 pm

Hi I have a Megane II 1.4 16v 2003 with fly by wire throttle the revs keep going up to about 2000+ while driving causing it to kind of drive itself, even with the clutch depressed it still does it and will sit and idle at high revs also if I blip the throttle it revs up then stutters a bit then revs back up to about 1400 and just sits there. The check engine light isnt on and I scanned it and it has no faults showing, any help with this would be great as I don't have a clue whats up with it. I also cleaned out the throttle body and it doesnt seem to be sticking at all.
Thanks
Jason

mattyc25
Pass Plus
Posts: 218
Joined: Mon Dec 27, 2010 4:15 pm
Currently Drives:: megane mk2

Re: Accelerating on its own

Postby mattyc25 » Wed Nov 16, 2011 5:33 pm

have you cleaned the egr valve?.. they tend to get gummed up too..

Matt
2009 Megane MK2 1.6 16v VVT, Rear Tinted Windows, 18 Kei Force 10 Hyper Black, Painted Calipers, Lowered 45mm, Full 12000k HID's, R26.R Spoiler

jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Re: Accelerating on its own

Postby jason_2801 » Wed Nov 16, 2011 7:46 pm

Not yet I shall have a look at that tommorow where abouts is it

jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Re: Accelerating on its own

Postby jason_2801 » Wed Nov 16, 2011 9:46 pm

Anyone got any ideas on this one
Thanks

davelowe
Driving Legend
Posts: 3136
Joined: Thu May 10, 2007 3:40 pm

Re: Accelerating on its own

Postby davelowe » Wed Nov 16, 2011 10:33 pm

If the battery is disconnected there is a reset procedure for the ECU to learn the idle and your driving habits.

I've posted it verbatim on here before. But, I think the idea is to start from cold, hold at a fast idle for 15 minutes until the radiator fans have kicked in, then try 15 minutes of mixed mode driving.

If you can't find my original post, bump this thread and I will have a look for it.
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jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Re: Accelerating on its own

Postby jason_2801 » Thu Nov 17, 2011 2:41 pm

Does anyone think this could be a vacuum leak i've just found the connection for the vapour solenoid hose on top of the intake manifold to have a broken clip and its quite loose so ive refitted it with sealer just gotta wait for it to dry now and give it a try

tomalamix
F1 Driver
Posts: 1766
Joined: Thu Jun 03, 2010 3:15 pm
Currently Drives:: Megane II 1.5dCI 100HP

Re: Accelerating on its own

Postby tomalamix » Thu Nov 17, 2011 11:27 pm

dont think so...

jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Re: Accelerating on its own

Postby jason_2801 » Fri Nov 18, 2011 11:51 am

No that didnt make any difference although if you remove this hose it causes the engine to rev to 5500 ish rpm and sit their till you reconnect it

jason_2801
Posts: 11
Joined: Thu Apr 21, 2011 11:12 am
Currently Drives:: Renault Megane II 1.4 16v

Re: Accelerating on its own

Postby jason_2801 » Sat Nov 26, 2011 4:24 pm

Still have'nt figured this out ive plugged it into clip and the throttle is at 14% when it should be idling anyone know if this is correct and also is it possible to reprogram the throttle parameters

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Anthony
Rally Driver
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Joined: Mon Jun 15, 2009 6:52 pm
Currently Drives:: 2005 Renault Megane 1.5 dci 100
Location: Preston

Re: Accelerating on its own

Postby Anthony » Sat Nov 26, 2011 8:47 pm

Mine shows this percentage at idle as well.
2005 1.5dci 100 Sport Hatch -Gone!

tomalamix
F1 Driver
Posts: 1766
Joined: Thu Jun 03, 2010 3:15 pm
Currently Drives:: Megane II 1.5dCI 100HP

Re: Accelerating on its own

Postby tomalamix » Sat Nov 26, 2011 11:49 pm

but your problem isnt idling, right? you should push the engine until the spot it has problems and then check the %

andylwilson
Posts: 18
Joined: Tue Feb 28, 2012 9:48 am
Currently Drives:: Renualt magane estate 1.6 petrol VVT 54 plate

Re: Accelerating on its own

Postby andylwilson » Tue Mar 06, 2012 11:49 pm

davelowe wrote:If the battery is disconnected there is a reset procedure for the ECU to learn the idle and your driving habits.

I've posted it verbatim on here before. But, I think the idea is to start from cold, hold at a fast idle for 15 minutes until the radiator fans have kicked in, then try 15 minutes of mixed mode driving.

If you can't find my original post, bump this thread and I will have a look for it.


I have the same problem unplugged my throttle body to clean it no cant get to idle bellow 1000 rpm do I have to do the same as above


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