linkage stickage

[Anonymous]

I was passing a car last night.....and my accelrator stuck open...and it kept going faster and faster...

I shut it off, and it went back to normal...but


A mechanic friend said that it was a known design flaw on 67-68...anyone ever heard this?

I think its my car with a sticky butterfly....carb has been going down hill steadily...

I am going to change carb...but should I get a cable accelerator too?
chaz

 

[chandler]

my 68 does the same thing and the carb is new...i think part of the choke is hitting part of the linkage and sticking open sometimes if i press down more then release it closes i just havent had time to clip off the little piece that sticks.

 

[Asa]

the only time i've ever had my carb stuck open was when i had a broken motor mount (and boy was that fun) and when the spring broke 20 miles outside of town (used some old speaker wire, wrapped it around the pedal so i could pull it back with my hand when i needed to slow down)

never had it stick for any other reason

 

[Anonymous]

yes, he mentioned motor mounts and the torgue....how do I check for bad motor mounts?

 

[Asa]

simplest way is to pop the hood, have someone put the engine in drive and hold down the brake and slowly give it gas, do the same in reverse
the engine will try to jump

if it does, and depending on when it jumps (drive Vs. reverse) it'll tell you which side is bad

a visual inspection can tell alot as well, or try to jack up the engine, once it gets high enough it'll raise off the bad mount

 

[Anonymous]

when I went to start the car today, it was just cranking...no gas


Popped the hood and found the linkage on the front of my carb )rod that goes form the triangle thing with grooves to other part) was dangleing. re-inserted that and it drove fine tonight

maybe that was it...but I will check mounts this weekend


thanks!
chaz

 

[Asa]

the only time the motor would actually jump and pull the accelerator cable when i was driving was when it was broken on the.... driver's (???) side
even then i had to be doing something pretty drastic (such as jamming it at a stop, or a brakestand, even going around a hard turn would do it, that auto-x session was fun...)
it would pull it up when i put it in reverse and tried to go back up a hill to get out of a parking spot

trust me, you'd feel it if the mount was bad, you'd get this horrendous crashing/banging noise

reverse and drive put different rotational forces on the drivetrain, which is why you gotta put 'em in both drive and reverse to check both of 'em, but since you said it did it while driving, you shouldn't have to worry about checking reverse (unless you wanna be sure)

 

[PutPut6]

When I first installed my carb after putting the new engine in, the butterfly would catch on the heater base thingy... i forget what it's called, the plate between the carb and the log. I had to loosen the bolts and center the carb better and it was no problem after that. I doubt this would be your problem though since it just now started, unless you have removed the carb lately.