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What the fudge?**UPDATE** Wanted: Getz
https://www.ausmini.com/forums/viewtopic.php?f=2&t=65397		 Page 1 of 3
Author:  Gibbo123 [ Wed Sep 01, 2010 1:48 pm ]
Post subject:  What the fudge?**UPDATE** Wanted: Getz
On my trip to work this morning, while driving along and going to change down gears I noticed the car revving more than usual so I took my foot off the accelerator and it was as if I didn't the car still drove along like normal. While changing gears it was also as if I had my foot on the gas. What's going on? Is it possible for the accelerator to get stuck? Or maybe the choke to fully engage itself?
Any ideas guys?
Author:  mini1990 [ Wed Sep 01, 2010 1:50 pm ]
Post subject: 
Maybe your accelerator cable has frayed and is causing it to get stuck inside its outer casing?
Author:  GT mowog [ Wed Sep 01, 2010 2:57 pm ]
Post subject: 
Since it was warm and muggy this morning.....................

It may seem un-related, but check that the engine earth strap is nice and tight. Just a thought...............
Author:  Hanra [ Wed Sep 01, 2010 3:07 pm ]
Post subject: 
Make sure your throttle return spring is still in place. Otherwise check the throttle cable. Pretty basic fault really.
Author:  Panthersteve [ Wed Sep 01, 2010 3:08 pm ]
Post subject: 
GT mowog wrote:
It may seem un-related, but check that the engine earth strap is nice and tight. Just a thought...............


Please explain :?
Author:  Mick [ Wed Sep 01, 2010 3:10 pm ]
Post subject: 
Panthersteve wrote:
GT mowog wrote:
It may seem un-related, but check that the engine earth strap is nice and tight. Just a thought...............


Please explain :?


Starter current passes through the choke, accelerator and heater cable when the earth strap is not in contact with the engine and chassis...nasty business!
Author:  Panthersteve [ Wed Sep 01, 2010 3:17 pm ]
Post subject: 
Hadn't thought of it that way.

Although the suggestion of looking at the earth strap is a bit misleading, it gives the impression that if it is loose you thighten it and carry on motoring.

In reality if this is the cause then you will also have choke and accelerator cables to replace.

Cheers
Steve
Author:  Gibbo123 [ Wed Sep 01, 2010 3:25 pm ]
Post subject: 
Panthersteve wrote:

In reality if this is the cause then you will also have choke and accelerator cables to replace.

Steve


So I'm hoping it's not this then???
Author:  phillb [ Wed Sep 01, 2010 7:09 pm ]
Post subject: 
Worth checking the pedal end of the cable also, make sure the outer cable is correctly positioned against the firewall, and that nothing it interfering with the operation of the inner cable or pedal.
Author:  Morris 1100 [ Wed Sep 01, 2010 7:11 pm ]
Post subject: 
Was it a bit foggy or damp this morning?
Were you cruising along at a fairly constant speed when it happened?

If the answer to both is yes it could be carby ice.
Author:  GT mowog [ Wed Sep 01, 2010 7:23 pm ]
Post subject: 
Panthersteve wrote:

Please explain :?


Mick wrote:
Starter current passes through the choke, accelerator and heater cable when the earth strap is not in contact with the engine and chassis...nasty business!


This is quite true, but wait - there is more.

If the earth strap makes poor connection while running, starter current is not a factor but coil and more so, alternator current is.

Two things occur when we get current flow, heat and magnetism.

Starter Current will cause enough heat to weld the Throttle and Choke Cables soild, so when this happens usually it will start then rev its nuts off while the surpised driver is trying to work out what is going on :shock: Clearly the cables and maybe even the throttle spindle of an SU or throttle spindle bearings of a webber will need replacing. Lesson - never use throttle when starting.

While running, if Alternator current flows through the throttle cable, usually it is not enough to cause damaging heat, but will be enough to have sufficent megnetism to cause the cable to stick - without damage, so just tighten earth strap and keep driving :)

<EDIT> Check battery condition and connections as the same ^ can happen.
Author:  drmini in aust [ Wed Sep 01, 2010 7:45 pm ]
Post subject: 
Morris 1100 wrote:
Was it a bit foggy or damp this morning?
Were you cruising along at a fairly constant speed when it happened?

If the answer to both is yes it could be carby ice.

If the problem went away since, this is my guess too. I had it happen at Queenstown in Tassie (foggy rainy day) with twin HS4s, boy it felt strange.
My cure was to stop the motor and coast it for a bit.
Author:  Gibbo123 [ Wed Sep 01, 2010 8:22 pm ]
Post subject: 
I was driving at a consistent pace and it was a damp morning, I'm hoping it is this carby ice you speak of, as everything else you all have mentioned scares the poo out of me!
Author:  GT mowog [ Wed Sep 01, 2010 8:37 pm ]
Post subject: 
Gibbo123 wrote:
On my trip to work this morning.................................... and it was a damp morning


??????? really???????

I was in Cambelltown, which is what??? 15 minutes from Camden and it was quite warm and muggy there at 6:15 this morning......well the weather has been strange lately :wink:
Author:  david rosenthal [ Wed Sep 01, 2010 8:48 pm ]
Post subject:  Re: What the fudge?
Gibbo123 wrote:
On my trip to work this morning, while driving along and going to change down gears I noticed the car revving more than usual so I took my foot off the accelerator and it was as if I didn't the car still drove along like normal. While changing gears it was also as if I had my foot on the gas. What's going on? Is it possible for the accelerator to get stuck? Or maybe the choke to fully engage itself?
Any ideas guys?


piston in carby sticking and not returning down when throttle is closed. This can be caused by carby icing but it normally needs to be bloody cold and plenty of moisture in the air to cause it.
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