Head Scratcher...
Thread Starter
|
New User
Joined: May 2011
Posts: 6
Likes: 0
Head Scratcher...
I have a 79 bronco with a 400m 4sp, 159,000 miles..Been a great truck! For the last year I have been fighting a knock in the engine. It started shortly after I put a timing chain set and oil, water and fuel pumps on it. It sounds pretty heavy, not a ping or value chatter. It only happens when you give it gas and rev it up to 1500 to 2000 rpms, then you get a knock knock knock. You drive it out on the road, every shift of course knock, knock knock. If you travel at 45 to 55 mph, on the gas it knocks, off the gas slowing down - no knocking. Just idling no knocking and runs so smooth.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com
fficeffice" /><o
></o>
<o></o>
Replaced..main bearings, second timing set, high volume oil pump, lifters, push rods...and no metal in the oil pan.<o></o>
fficeffice" /><o></o><o
></o>Replaced..main bearings, second timing set, high volume oil pump, lifters, push rods...and no metal in the oil pan.<o
></o>
Senior User
Joined: Nov 2010
Posts: 373
Likes: 0
From: Chesapeake Va.
Forgot to mention once I put on a "new" fuel pump that knocked what a pain that was tracking down listen around with a broom handle to your ear at various places on your engine to try and isolate the area its coming from.
Trending Topics
Thread Starter
|
New User
Joined: May 2011
Posts: 6
Likes: 0
Thank you for your post BigDaddys76,
I will correct the vacum, at least its hooked to the passager side of carb. I will block off the one on the intake.
Fuel Pump, you say...interesting, could it cause a deep knock like this? could it be that simple?
I will correct the vacum, at least its hooked to the passager side of carb. I will block off the one on the intake.
Fuel Pump, you say...interesting, could it cause a deep knock like this? could it be that simple?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Senior User
Joined: Nov 2010
Posts: 373
Likes: 0
From: Chesapeake Va.
Also got a 65 supersport once with a crate motor 350 installed to a two speed power glide and the guy swore that his new motor had a rod knock, found that he forgot to tighten the torque converter bolts!!!!!
Got that car for nearly nothing over a simple oversight.
So look around for some of the easy simple things first and then check again.
Got that car for nearly nothing over a simple oversight.
So look around for some of the easy simple things first and then check again.
Thread
Thread Starter
Forum
Replies
Last Post
bkuuz1
1999 - 2003 7.3L Power Stroke Diesel
2
May 2, 2014 09:47 AM
wagonerkl
1997 - 2006 Expedition & Navigator
22
Dec 5, 2013 08:15 PM
bhirtz
Fuel Injection, Carburetion & Fuel System
8
Aug 27, 2011 02:38 PM
robbobvila
1961 - 1966 F-100 & Larger F-Series Trucks
20
Aug 13, 2011 12:12 PM
