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Throttle sticking in Bronco

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Gsmblue

Throttle sticking in Bronco

This week I noticed that sometimes when I pulled up somewhere with a warm engine the revs were sitting high, around 1krpm as opposed to the normal 6-700rpm. Pulling the pedal up with my foot did not drop the revs. The throttle is a cable going to a Edelbrock 1406.

Today I started the Bronco, turn key, pump throttle a couple of times and the revs just shot up and I had to kill the engine.

Tried again and it would stick randomly. As it was misbehaving I did not drive it.

Any suggested on where to start looking for issues? I was thinking of popping the cable off the carb and seeing if the cable was sticking and then looking for binding in the linkages on the carb. Does that sound reasonable?

1985.5 F-150 XL Explorer standard cab 5.0 EFI AOD 4x4
Daily Driver. We call her Eunice the Ute.

1982 Bronco XLT Lariat 351W AOD 4x4
Code name Esperanza, or Espy to her friends. Please see my Project thread for the blow by blow.

1984 F-350 XL Centurion crew cab 460 T19 4x4
"Eylza Dual-little"

1986F150Six

Re: Throttle sticking in Bronco

Administrator

Disconnect the cable. That is a good start.

Gsmblue

Re: Throttle sticking in Bronco

Thanks for confirmation!

1986F150Six

Re: Throttle sticking in Bronco

Administrator

Look for a kinked cable or something binding. Have you done any mechanical work in the area of the cable lately? Have you installed a different air cleaner or done any choke adjusting?

Gary Lewis

Re: Throttle sticking in Bronco

Administrator

I'm having a similar problem with Big Blue, so I don't have answers. The idle just doesn't come back down all the way unless you blip it quickly, then it will. But the high idle isn't high enough to be a problem, just annoying.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Gsmblue

Re: Throttle sticking in Bronco

I pulled the cable at the carb and it was running smooth, springing around nicely. I sprayed some liquid wrench (their anti wear/lubricant formula) in the ends of the cable anyway and worked it in. It definitely made a difference. Albeit a small one.

Then I started the engine with the cable attached, disconnected the cable and stated to rev the engine from the linkage at the carb. It was stiff and would not rebound all the way back to idle.

The exterior of the carb is clean and I have not touched that area for over a month. So I sprayed the linkages with the same spray and worked the mechanism for a bit and it loosened up nicely.

So I put it back together and she seems fine now...

Gary Lewis

Re: Throttle sticking in Bronco

Administrator

Interesting! I've not tried lubricating the linkage nor the cable. May try that. Thanks.

Gary, AKA "Gary fellow": Profile

Gsmblue

Re: Throttle sticking in Bronco

Nothing to lose!

In hindsight I would have sprayed some carb cleaner on the linkages first and work that in, let it sit for a bit and then lubricate.

This is what I used as it had it to hand:

https://www.liquidwrench.com/product/lubricating-oil/

ArdWrknTrk

Re: Throttle sticking in Bronco

Administrator

I had a similar problem with my AVS last year, but it was the choke not engaging (the coil spring was not strong enough)
I worked the action and then used dry Teflon spray.
I use the same thing on the tables and slides of my woodworking shop tools.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Gsmblue

Re: Throttle sticking in Bronco

After a couple of days of driving I can report everything is working well.

grumpin

Re: Throttle sticking in Bronco

Good deal!

Dane
1986 F250HD SC XLT Lariat 4x4 460 C6-Sold
1992 Bronco XLT 4x4 351W E4OD
1998 GMC Sierra SLE K1500 350 4L60E
Arizona

Gary Lewis

Re: Throttle sticking in Bronco

Administrator

In reply to this post by Gsmblue

Good to know!

Gary, AKA "Gary fellow": Profile

ArdWrknTrk

Re: Throttle sticking in Bronco

Administrator

In reply to this post by Gsmblue

Glad you've got it solved, and your Edelbrock is back behaving as it should!

Simple fixes are the best.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.