High Idol - PLEASE HELP!!!
Thread Starter
|
Senior User
Joined: Sep 2002
Posts: 258
Likes: 0
From: State College USA
High Idol - PLEASE HELP!!!
MY '83 Bronco is idoling around 2 1/2 grand even after 1 hour and 30 minutes of driving it. Is there somthing that is sticking that I do not know about? I try to kick it down by giving it some gas but it just stays at 2 1/2 grand. I cleaned the carb and all of its linkage so I dont think its the choke. Let me know what you guys think!
Ryan
Ryan
Posting Guru
Joined: Jul 2002
Posts: 2,205
Likes: 1
From: Vancouver WA
High Idol - PLEASE HELP!!!
It should never idle that high no matter how cold it is. Did this just start happening? Have you made sure the throttle linkage returns all the way to the idle position and isn't getting stuck on something. May sound silly, but make sure the gas pedal isn't stuck on a floor mat.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
High Idol - PLEASE HELP!!!
How long has it done this? If it only happened when it got cold out, I'd look at the fast idle cam & screw, and the thermal valve in the side of the air cleaner. If the hose isn't attached from it to the diverter on the neck, you could have a vacuum leak, but it shouldn't be THAT much. Listen around the engine compartment with a 3' piece of garden hose for a hiss - that's the vac leak that's allowing the engine to rev up so high.
Thread Starter
|
Senior User
Joined: Sep 2002
Posts: 258
Likes: 0
From: State College USA
High Idol - PLEASE HELP!!!
It has been doing this for a while. I did get the engine rebuilt and I know that the hoses are not stock anymore for the vacuum. A couple people have told me that it might be that my choke is not opening or closing properly. I should add that it takes a good 25 pups of the gas pedal to get the truck started. This all started with in the last 3 months, so I have no idea if its just cause its cold, since I havent had it happen when its warm out yet. Let me know if the pupping leads you to believe it might be somthing else.
Thanks!
Ryan
Thanks!
Ryan
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
High Idol - PLEASE HELP!!!
so you rebuilt the motor, how about the carb. if your needing to pump the gas that much to get it started there is something seriously wrong. Have you tried adjusting the idle screw, checked your air/fuel screws. What kinda carb are you running??
Trending Topics
Mountain Pass
Joined: Sep 2002
Posts: 181
Likes: 0
From: covington
High Idol - PLEASE HELP!!!
You said this started happening when you rebuilt the engine. I am not trying to insult your intelligence but have you tried adjusting the throttle adjustment screw. Reason I ask this is that for the first 20 minutes of running on a new cam you should idle about 2200 rpms to break in the cam. THe idle may have been intentionally turned up that high to break in the cam. The second thing I would look for is a stuck or bad float adjustment. When a carb usually goes bad, the idle drops off due to vacuum leaks around the throttle shaft etc. causing a lean condition. It appears to be getting extra fuel instead of less. If the float isn't operating properly you may be spilling gas into the carb through the bowl vent tube. You shuold be able to see this easily from looking down the top of the carb. This would cause a rich condition and you should see carbon coming out of the tailpipe. If you are not seeing this then something is holding your throttle plates open allowing it to get extra fuel and gas, so double check all of your linkages. I would make sure that the throttle shaft isn't bent keeping it from closing completely.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
Senior User
Joined: Sep 2002
Posts: 258
Likes: 0
From: State College USA
High Idol - PLEASE HELP!!!
I have a motocraft carb (2 barrel). Where are these screws? (Idol, feul/air) do you guys have any on-line pictures of where they are on the carb? When I try to kick the idol down manually under the hood it wont go down either. Yet when I gave some slack to the throttle into the carb it backs off. Sorry I am not all that technical. could somthing be sticking somwhere? Is it safe to use some good ol' WD-40 on all the springs and moving parts around the carb (throttle linkage)??
Ryan
Ryan
Hotshot
Joined: Jul 2002
Posts: 14,285
Likes: 12
From: Bend,OR
High Idol - PLEASE HELP!!!
from what your saying it sounds like the linkage is getting bound up some how. with out looking at it hard to say whats causing this. You might try the wd40, you might also think about just yanking that 2barrel and manifold and look for a good edelbrock intake. You would a lot happier and so would the motor. Now off hand i cant picture your throttle linkage is it a cable or a bunch of levers and springs. mine is efi so taking a pic wouldnt help you at all. sorry.
the air/fuel screws are on the bottom front of the carb. these are one screw for each side with a small spring wrapped around each on. I believe the correct adjustment to start with is to turn them all the way in clockwise, then back them back out either 1.5 turns or 2. then start the truck and continue turning out till you get desired idle and the exhaust isnt smoking. I would get a haynes/chiltons manuel it will explain this and be a big help down the road for other situations.
good luck
the air/fuel screws are on the bottom front of the carb. these are one screw for each side with a small spring wrapped around each on. I believe the correct adjustment to start with is to turn them all the way in clockwise, then back them back out either 1.5 turns or 2. then start the truck and continue turning out till you get desired idle and the exhaust isnt smoking. I would get a haynes/chiltons manuel it will explain this and be a big help down the road for other situations.
good luck
