4180 holley trouble

JCastellaw · #1 (**permalink**) 10-14-2007, 06:59 PM

i have a 4180 on a rebuilt 351w in my 74 bronco. the other day, I was driving and I mashed on the petal and made it kick down. when I let off, it was like I still had my foot on the petal. I had to turn it off. I pop the hood and made sure nothing was touching the accel. linkage. it wasnt so I adjusted the idle on the driverside down. does anyone have a clue what caused this????
It scared the heck out of me!

faststang94 · #2 (**permalink**) 10-15-2007, 01:37 AM

do you have a return spring carb?

JCastellaw · #3 (**permalink**) 10-15-2007, 10:19 AM

It's a Holley 4180. Not sure if it is a return spring!

faststang94 · #4 (**permalink**) 10-15-2007, 10:18 PM

well it has to have a spring on the linkage in order for it to close when you let off the throttle

JCastellaw · #5 (**permalink**) 10-16-2007, 09:30 AM

Yes, and the spring is still attached to the fire wall

faststang94 · #6 (**permalink**) 10-16-2007, 09:22 PM

are we talking about the same spring? the one im talking about connects to the carb linkage and should have a mount or something on the intake or whatever or some custom mount made for the spring to hook to

JCastellaw · #7 (**permalink**) 10-17-2007, 12:17 PM

Spring pulling foward or towards the fire wall?

faststang94 · #8 (**permalink**) 10-17-2007, 09:48 PM

i dunno where ever it mounts too or you can put it. as long as the carb linkage has a spring on it so even if you dont have the throttle hooked up it will make the carb linkage spring back to closed.

JCastellaw · #9 (**permalink**) 10-18-2007, 11:05 AM

Yep! Spring is there. Is there any other thing that it could be??

faststang94 · #10 (**permalink**) 10-18-2007, 09:56 PM

not sure? the only way i could see the throttles sticking like that is if the butterflies aren't closing all the way or something

68 351 bronc · #11 (**permalink**) 10-22-2007, 05:46 AM

Could it have been the linkage hitting the bottom of the air filter housing. Maybe you took the filter off to check. How about the floor mat? Both of these items have caused my throttle to stick.

JCastellaw · #12 (**permalink**) 10-23-2007, 01:27 PM

Neither of those. I was told it could be something on the Choke side. Would it be worth buying a Truck Avenger or rebuilding my 4180. I am on a tight budget so give me ideas. Is there another carb you recommend???

dodmort · #13 (**permalink**) 10-23-2007, 05:35 PM

how dirty is the carb?

JCastellaw · #14 (**permalink**) 10-23-2007, 07:46 PM

old and dirty

faststang94 · #15 (**permalink**) 10-23-2007, 08:05 PM

hell id just get a regular old 4150 or whatever 650cfm vacume secondary carb and it should be alright they are only like 250-300 bucks if u can get ahold of a used one or something on ebay im sure you could get it for cheaper