Dont Panic

[therat04]

I took the old girl out for a lovely drive today well it was lovely until i dropped a gear and overtook someone who decided to put their foot down as i pulled out, no matter i thought... foot to the floor head sinks into the head rest and i was gone.... nearly literally because as i pushed the clutch and changed into fourth the engine screamed and scrunched into fourth gear, christ the throttle had stuck wide open, 65 70 80...i tried to brake like an idiot..i kicked the pedal, it was a good job this road had some straight length otherwise i would have had a 300 year old oak as a bonnet badge, still panicking i managed to get my toe under the throttle pedal and lift it which thankfully did the trick.
On inspection back at the pits the only thing i could see that may have caused this problem was the small bracket that the throttle cable connects to on my webers, this has extremely sharp square edges that could have caught on the body of the weber, but not any more tin snips out and they are now rounded off.
I lubricated all the moving parts of the weber the other day and it seemed fine.
If you have a weber conversion then it is worth a check around that area of the weber to make sure you have removed any sharp bits and nothing can catch or jam up, i have run the car with a weber for a few years now without any problems until now...Steve

[GDPR]

Changed your trousers yet Steve? I know your car is brown.....

[Staggard]

I took the old girl out for a lovely drive today well it was lovely until i dropped a gear and overtook someone who decided to put their foot down as i pulled out, no matter i thought... foot to the floor head sinks into the head rest and i was gone.... nearly literally because as i pushed the clutch and changed into fourth the engine screamed and scrunched into fourth gear, christ the throttle had stuck wide open, 65 70 80...i tried to brake like an idiot..i kicked the pedal, it was a good job this road had some straight length otherwise i would have had a 300 year old oak as a bonnet badge, still panicking i managed to get my toe under the throttle pedal and lift it which thankfully did the trick.
On inspection back at the pits the only thing i could see that may have caused this problem was the small bracket that the throttle cable connects to on my webers, this has extremely sharp square edges that could have caught on the body of the weber, but not any more tin snips out and they are now rounded off.
I lubricated all the moving parts of the weber the other day and it seemed fine.
If you have a weber conversion then it is worth a check around that area of the weber to make sure you have removed any sharp bits and nothing can catch or jam up, i have run the car with a weber for a few years now without any problems until now...Steve

See Steve Vmad said the Webber would improve the performance

[GDPR]

But not of his colon....

[therat04]

Tell you what Russ if those timing chains were going to give way they would have done so then, i had Green trousers on today so if i had cacked myself it would have been a job to see where me and the car stopped and started if you see what i mean..Steve

[therat04]

See Steve Vmad said the Webber would improve the performance

Hello Graham impressive turn of speed i can recommend the sharp throttle bracket jamming mod.. What a buzz im still hopping around now, in strange way i want to do it again, but i think as well as an oak tree i would probably have me gear box in me lap!!!...Steve

[therat04]

But not of his colon....

Im not sure if Chris has bought out a modification for your colon yet Russ...Steve

[sjm]

Hi Steve
I would of thought from what you have said that the acc/ped was caught on the carpet Stagmuffin had this happen if think on a rolling road a few years ago, took the engine up to 7,000 rpm, worth checking the carpet, as you said you had to lift up the peddle up, also can have the opposite affect where you can not open the throttle enough because the carpet is stopping the full travel.

In any case I would check this out more, would not want that to happen again.

Safe motoring
Steve

[KOY 23]

Had this happen due to snail shaped linkage jamming on inlet manifold at full throttle, fortunately I checked this when fitting. Metal is very thin so easily filed down.

Throttle would not fully close sometimes, 1500rpm tick over on an auto is not helpful in traffic. Adding a return spring cured that.


p.s. Adrenalin smells stronger than oil fumes.

[KOY 23]

Im not sure if Chris has bought out a modification for your colon yet Russ...Steve

I'm sure Russ can think of a mod.

[therat04]

Hello Steve i checked the carpet and its a good fit no evidence it snagged the throttle, the clue was a shiny patch on the carb body where i assume the bracket was rubbing as there is a fair bit of play in it.
As you say i am popping round the garage to check out some more your right i do not want that to happen again...Steve

[therat04]

Had this happen due to snail shaped linkage jamming on inlet manifold at full throttle, fortunately I checked this when fitting. Metal is very thin so easily filed down.

Throttle would not fully close sometimes, 1500rpm tick over on an auto is not helpful in traffic. Adding a return spring cured that.


p.s. Adrenalin smells stronger than oil fumes.

When i fitted the weber all appeared fine and i could not get the bracket to foul against anything even though it looked like it wanted to, as i have said its been fine for a few years, going to check it again to see if somethings moved or whatever...Steve

[milothedog]

The trouble with doing modifications of any sort is the potential for it to fail or cause other issues, even compromise safety. The thing with cars is anyone, qualified or not, can change, alter or re design anything they want. Even sell it commercially. This can then cause damage or even worse cost live's with no or little come back on the individual.

The industry I worked in was heavily policed when it came to such things. Anything we did had to be subject to strict R&D then submitted to VOSA for approval before it was introduced across the fleet. If it was safety critical (steering, brakes etc) a one off conversion would have to be taken to a VOSA testing Station for evaluation and approval before we could introduce it to the rest of the fleet.


Ian.

[DJT]

Sticky throttle isn't only applicable to Weber carbs. I had the same thing with Strombergs years ago. The throttle cable end had been left a little long and it caught in the carb linkage system, jamming it on full throttle. I too learnt that adrenaline is brown in colour..........

Since then I have always ensured that the raw end of the throttle cable is cut fairly short and then covered in heat-shrink tubing to stop it fraying.

[milothedog]

Sticky throttle isn't only applicable to Weber carbs. I had the same thing with Strombergs years ago. The throttle cable end had been left a little long and it caught in the carb linkage system, jamming it on full throttle. I too learnt that adrenaline is brown in colour..........

Since then I have always ensured that the raw end of the throttle cable is cut fairly short and then covered in heat-shrink tubing to stop it fraying.

I "Tin" them with solder Dave, it makes it a doddle to remove and refit when removing the Carb's.