runaway?

[Eagle_Adam]

i think thats what its call, ive never experienced it my self until now.... i think

 

 

Anyway, heres the issue. I was OMW to work this morning coming up a rather steep hill so i gunned it cus i could and no one was around. My tach redlined in 3rd at 7k and didnt not come back down after i let off the gas. So i killed the motor and coasted to the next stop light, starteded her up same deal strait to redline and wont come back down unless i put it in gear. So i tossed it in 5th and made it the rest of the way to work. 

 

I popped the hood when i got to work and found the vacuum fromt he dizzy to the carb had popped off so i reconnected it but theres no change in the RPM jump

 

 

 

A. WTF did i do? 

B. how do i fix it? 

 

 

 

 

 

 

[izzo]

iirc the vacuum advance is only really used when you have the throttle open. I can remove mine and the idle wont change.  Throttle stuck? Check yo intake/exhaust bolts... weber bolts snug?  check your brake booster line too maybe it popped off.

 

Wouldn't think it would rev up really high tho but idk

[DanielC]

Check the throttle return spring!

[INDY510]

I had NO gas pedal at all ... like it fell to the floor ....... my throttle linkage fell apart at the firewall... and the webber DGV had no return spring (so it went wide open)

 

I had this problem every time I made a rapid acceleration ... ... so far, a stack of washers between the firewall and throttle linkage mount has fixed the problem (the stock throttle rod was too short for the webber DGV) and kept popping out of the firewall mount

[Eagle_Adam]

throttle return spring is present.... 

 

Izzo, manifold were just retorqued. But ill check for a stuck throttle dont know why i didnt in the first place and ill check the carb plate bolts

[Eagle_Adam]

Indy, this is a cable draw set up

[Eagle_Adam]

so the carb and manifold nuts are all tight, throttle return spring is present and functioning, throttle moves when you hit the gas pedal and returns after.....

[izzo]

Manual or auto choke? It get stuck closed? Idk dude its gotta be carb or in some relation, air fuel. Dizzy bolt snug, didn't advance a bunch?

 

Anyone thing maybe the vac advance get stuck maybe? Haha I really dunno mang :/

 

Replace the headlight with a fleshlight and fuck it.

[Eagle_Adam]

electric choke, timing was set to 10 - 12 degrees 

[wayno]

The throttle/butterflies have to be open for it to rev up, at least to have any kind of power, so pull the air filter off and look down the holes, are the secondaries stuck open?

I suppose it could rev up fairly high in neutral without the butterflies open, but it would not have any power, as it would be starving for air.

I would look down the intake holes with a flashlight, something is not returning like it's supposed to.

[Guest_kamakazi620]

so the carb and manifold nuts are all tight, throttle return spring is present and functioning, throttle moves when you hit the gas pedal and returns after.....

is your choke sticking??

[Eagle_Adam]

not that i know of, how would i check it? 

[DISLEXICDIME]

Look at the shaf not tje cable holder the cable bracket might move and the butter flys might stuck

[Eagle_Adam]

[Eagle_Adam]

video^^ 

[bananahamuck]

Have you taken cable off and seen if it still does it??  If you tighten clamp at the end of cable sometimes it keeps it from moving freely...or worst case a frayed cable inside sheath..

[converted_to_datsun]

Maybe the accelerator pump is messed up? Looks like allot of fuel is dumping in there for no reason

[Eagle_Adam]

Have you taken cable off and seen if it still does it??  If you tighten clamp at the end of cable sometimes it keeps it from moving freely...or worst case a frayed cable inside sheath..

 

no, but ill do that on my lunch break! the cable is new as of 6 mo ago 

 

Maybe the accelerator pump is messed up? Looks like allot of fuel is dumping in there for no reason

 

its a new pump, this was the carb on jessi's motor before it jumped a timing gear tooth 

[datzenmike]

Choke only richens the mixture, you have to have lots of air getting in for it to rev up. Does the 32/36 have mechanical secondary? How is the secondary closed when letting off the gas?

[Eagle_Adam]

from my friend wildbill

 

"You need to pull off your carb. I can see the secondary isn't closing all the way.  You might have to loosen butterfly screws and recenter the butterfly."

[datson4life]

 

this happened to me once, my secondary stayed open cause it came loose from here

[Eagle_Adam]

interesting.... its lunch time in 10 min so ill go peak around 

[datson4life]

make sure u didnt loose one of those springs, cause i did

[datson4life]

and heres how it looks when connected/normal

[Eagle_Adam]

all the linkages are intact and functioning :/

 

but, i did take a closer look and one of the secondaries is sticking...