302 Don't Run Good!!!!!!
Thread Starter
|
Senior User
Joined: Mar 2002
Posts: 227
Likes: 0
From: Kent, WA
302 Don't Run Good!!!!!!
I have a 69 bronco with a 302 in it. It fires right up and idles like a champ. With it in neutral you can rev the engine and it sounds good with no problems. But once it's in gear and you try to go, it spits and spudders, and it falls on it's face. I just had the carburator rebuilt and that didn't solve the problem. The carburator is a Holley 2 bbl. Just for #####s and giggles I swapped the carburator off of my 65 F-250 (another Holley 2bbl) with the one off the bronco. The bronco ran like a champ, and my truck did the same thing the bronco was doing. I'm stumped, I don't know what else to do or check. Any suggestions would help.
Thanks, Mitch
Thanks, Mitch
Post Fiend
Joined: Apr 2002
Posts: 5,964
Likes: 1
From: Woodruff, SC
302 Don't Run Good!!!!!!
It sounds to me like whoever rebuilt the carburator did'nt do it right the problem you are describing sounds like a faulty power valve and/or the acelerator pump
Wiz
An Equal Opportunity Truck Lover!
Wiz
An Equal Opportunity Truck Lover!
Post Fiend
Joined: Nov 2001
Posts: 7,698
Likes: 4
From: Neenah, Wisconsin
302 Don't Run Good!!!!!!
funny story about this...it happened to my truck the other night...started runnig like crap and stubling under light load but ran fine at idle. turns out two sparkplug wires were completely fallen off....sometimes its the simple crap that makes the difference,,,
Ryan
Ryan
Thread Starter
|
Senior User
Joined: Mar 2002
Posts: 227
Likes: 0
From: Kent, WA
302 Don't Run Good!!!!!!
I can try replacing the accelerator pump and see if that helps. I don't think that it's the fuel pump because the clear inline fuel filter is always full. The fuel float level is right at the bottom of the hole, and I just had the air/fuel mixture tuned by a shop. I don't know what else to check, I am completely stumped. Could my jets in the carb be too small for my 302?
Trending Topics
Post Fiend
Joined: Apr 2002
Posts: 5,964
Likes: 1
From: Woodruff, SC
302 Don't Run Good!!!!!!
>I can try replacing the accelerator pump and see if that
>helps. I don't think that it's the fuel pump because the
>clear inline fuel filter is always full. The fuel float
>level is right at the bottom of the hole, and I just had the
>air/fuel mixture tuned by a shop. I don't know what else to
>check, I am completely stumped. Could my jets in the carb
>be too small for my 302?
If the carb backfired at all i would also replace the power valve holleys have a bad problem as far when they backfire the power valve gets weak and/or fails.As for the jets was the carb on the bronco originaly if so i do'nt think their the problem.
Wiz
An Equal Opportunity Truck Lover!
>helps. I don't think that it's the fuel pump because the
>clear inline fuel filter is always full. The fuel float
>level is right at the bottom of the hole, and I just had the
>air/fuel mixture tuned by a shop. I don't know what else to
>check, I am completely stumped. Could my jets in the carb
>be too small for my 302?
If the carb backfired at all i would also replace the power valve holleys have a bad problem as far when they backfire the power valve gets weak and/or fails.As for the jets was the carb on the bronco originaly if so i do'nt think their the problem.
Wiz
An Equal Opportunity Truck Lover!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
Post Fiend
Joined: Apr 2002
Posts: 5,964
Likes: 1
From: Woodruff, SC
302 Don't Run Good!!!!!!
The power valve is on the metering block (same place you adjust the air mixture)you will have to pull the bowl to get to it.It's on the back side and if its wet with gas it's bad. Be careful when you pull the bowl and metering block try not to tear the gaskets.I would consider this a last resort seeing that you had it rebuilt did the place that you had it done give you a warranty?
Wiz
An Equal Opportunity Truck Lover!
Wiz
An Equal Opportunity Truck Lover!
Thread Starter
|
Senior User
Joined: Mar 2002
Posts: 227
Likes: 0
From: Kent, WA
302 Don't Run Good!!!!!!
I don't think the carburator shop gave me a warranty. I'm not sure what all they replaced, or even if they replaced anything. They said that the carb was a little dirty and they cleaned it up. But they didn't say anything about replacing parts.
Thread
Thread Starter
Forum
Replies
Last Post
Charlesmax90
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
11
Sep 6, 2016 11:12 AM
Rusty_S
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
5
Jun 22, 2016 07:52 AM
mvassek
Electrical Systems/Wiring
4
Nov 14, 2003 06:54 PM