My throttle pedal broke!

[MHunter]

Luckily for me, I was still in the garage when it happened. Just started the car and hit the gas a bit, and ended up with 2 throttle pedal parts. I wonder why it was welded that way, seems like an awfully weak weld. Any reason why I can't just have the rod properly welded, making sure the hole doesn't get deformed, of course?

[V8Dom]

yes

just reweld back in the same place

v cut it for a deeper weld..

dom

[alfasteve]

MHunter said:

Luckily for me, I was still in the garage when it happened. Just started the car and hit the gas a bit, and ended up with 2 throttle pedal parts. I wonder why it was welded that way, seems like an awfully weak weld. Any reason why I can't just have the rod properly welded, making sure the hole doesn't get deformed, of course?

Thats a realy heavy right footh you dont know the power in your right legg

[Storer]

I would give the Factory a call as that should not happen and by the look of your picture the weld looks corroded.

Paul

[Mjpmark]

Happened to mine, on the motorway, on the way to meet a prospective buyer!!!

[MHunter]

The weld is not corroded. In fact, it is not even a weld. It is copper brazing. I don't know why it is done this way, instead of proper welding.

[Storer]

Braising should be strong enough for this application. Are you sure you didn't get something jammed underneath or does your throttle not go all the way to the bulkhead?


Paul

[alfasteve]

Or just a heavy right footh

[MHunter]

it also happened to mjpMark. Maybe we both have heavy right foot. But an Ultima was built for people with a heavy right foot!

Not a big deal, I got it welded. I just mentioned it to see if it had happened to someone else (it did), and maybe a word of caution, I wouldn't want that to happen exiting a corner on a race track.

[alfasteve]

MHunter said:

it also happened to mjpMark. Maybe we both have heavy right foot. But an Ultima was built for people with a heavy right foot!

Not a big deal, I got it welded. I just mentioned it to see if it had happened to someone else (it did), and maybe a word of caution, I wouldn't want that to happen exiting a corner on a race track.

I would prefer not to have such an experience in any case, but i rather have that happening on a racetrack, than a public road where you can meet a Tree, Building , Truck or a pedestrian while being out of control.

On a PROPPER race track you will end up in the gravel trap having a car full of stone chips

[macgtech]

If this happens the throttle body should close due to the spring.

Were you running a throttle stop to limit travel?

[spatz]

I also want to add that you must make sure to use the right side of the accelerator cable. In my case I used the wrong one which resulted in a cut cable.
One side of the accelerator cable has a tube prevent cutting through the cable when moving the pedal.

[MHunter]

Looking at the factory photo posted above, I'm thinking my pedal was probably not adjusted correctly in regards to the backstop doing its job.

[macgtech]

Ultima factory said:

All accelerator pedals supplied by the factory come with a pedal back stop.
Please make sure you have it installed to prevent undue strain on the pedal itself or the linkage.

Mjpmark, your photo evidence that you emailed to us at the time showed that you didn’t have an accelerator pedal back stop fitted.


LS Engine accelerator pedal back stop fitment


SBC Engine accelerator pedal back stop fitment




Regards to all,

Could you post a picture of the FBW pedal too please? Thanks

[738 driver]

Its mounted on the chassis rail above Johnny.. the pushrod/balljoint actuates it ! Some builders have the whole FBW pedal assembly bolted directly in place of the original Factory pedal..

There must be many pics on various fit styles.

[Davrianman]

This is how I did mine. Adjustable stop and also added secondary return spring...

[spatz]

have been putting an additional spring at the throttle body, easier to access

[V8Dom]

Davrianman said:

This is how I did mine. Adjustable stop and also added secondary return spring...

I too put a return spring at the engine end.. there is no point the pedal springing back too quickly, it will also weaken the throttle cable as the pedal will snap shut but before the cable has returned. snagging the cable.

If you have additional return at the engine it will pull the cable and pedal back together.

Dom

[YIIHAA]

I had my throttle jam on WOT in third gear at >70 leptons on a C road, only one throttle return spring. It was great fun! I now have a charming pair of Goodyear Fiorano flat spotted tyres as garden planters, as well as a framed pair of soiled Y-fronts.

[macgtech]

Thanks, I couldn't envisage how the unit was going to fit in the footwell but it all makes sense now...