429 running rough
Thread Starter
|
Senior User
Joined: Feb 2005
Posts: 391
Likes: 0
From: Eastern, NC
429 running rough
Hello everyone. I have been browsing for a while and never needed advice until now. I have a 79 f-150 lariat 4wd with a 1971 429 .
It has a edelbrock performer rpm intake, holley 750, headers, MSD 6a ign, Dove heads and a lunati bracket cam.
I just upgraded my water pump to a weiand aluminum and my fuel pump to an edelbrock 110gph.
well after doing this it will not run properly, it backfires through the carb and will die in the street and shut off even after it is warm. I thought it must be the fuel pump so I put my original carter back on and changed the in line fuel filter but it still did not help. I am lost. Could I have moved the timing chain by changing the fuel pump? I am open to suggestions. I am going to put new plugs, rotor and cap on today. Thanks
It has a edelbrock performer rpm intake, holley 750, headers, MSD 6a ign, Dove heads and a lunati bracket cam.
I just upgraded my water pump to a weiand aluminum and my fuel pump to an edelbrock 110gph.
well after doing this it will not run properly, it backfires through the carb and will die in the street and shut off even after it is warm. I thought it must be the fuel pump so I put my original carter back on and changed the in line fuel filter but it still did not help. I am lost. Could I have moved the timing chain by changing the fuel pump? I am open to suggestions. I am going to put new plugs, rotor and cap on today. Thanks
New User
Joined: Jan 2008
Posts: 0
Likes: 24
. Could I have moved the timing chain by changing the fuel pump?
NO,
I am open to suggestions.
Vacuum lines are off ?
I assume it is the factory Cam in it ?
If so, I would suggest fine tuning the timing,tuning the carb, check SP wires,cap,etc.
Check first, replace if necessary.
My 429 just purrs.
I am going to put new plugs, rotor and cap on today. Thanks
Edit/Delete Message
NO,
I am open to suggestions.
Vacuum lines are off ?
I assume it is the factory Cam in it ?
If so, I would suggest fine tuning the timing,tuning the carb, check SP wires,cap,etc.
Check first, replace if necessary.
My 429 just purrs.
I am going to put new plugs, rotor and cap on today. Thanks
Edit/Delete Message
Thread Starter
|
Senior User
Joined: Feb 2005
Posts: 391
Likes: 0
From: Eastern, NC
No it is a lunati bracket cam. I think the problem was a loose distributor. I am going to purchase a timing light now. Do i need to disconnect anything in order to get an accurate read? I moved the distibutor and it started running real smooth.
Senior User
Joined: Sep 2003
Posts: 364
Likes: 0
From: Hartland, MI
Sounds like loose dist. Set your base idle timing with the vacume unhooked from dist. With an engine built like yours however I would run about 32 deg total timing at 2800 RPM. This should be a good starting point. Do easily set it at this you will need a timing light with adjustable dial on it. Turn that to 32 degrees and then run the engine at 2800 RPM. Turn the dist until the timing mark is set on the 0 degree mark on balancer. You should see a noticeable improvement in performance. You can retard or advance the timing until you get spark knock or it wont start when hot.
New User
Joined: Jan 2008
Posts: 0
Likes: 24
Engine at normal operating temp
Premium fuel
4*BTDC
600 rpm in drive (e-barke applied)
remove the vacuum hose from the vacuum advance & plug it.
From there it is mini adjustments due to altitude,air temp.
Average temp is best
Premium fuel
4*BTDC
600 rpm in drive (e-barke applied)
remove the vacuum hose from the vacuum advance & plug it.
From there it is mini adjustments due to altitude,air temp.
Average temp is best
Postmaster
Joined: Jul 2003
Posts: 2,544
Likes: 2
From: okc
Originally Posted by Mil1ion
Engine at normal operating temp
Premium fuel
4*BTDC
600 rpm in drive (e-barke applied)
remove the vacuum hose from the vacuum advance & plug it.
Premium fuel
4*BTDC
600 rpm in drive (e-barke applied)
remove the vacuum hose from the vacuum advance & plug it.
Trending Topics
Senior User
Joined: Sep 2003
Posts: 364
Likes: 0
From: Hartland, MI
Yes there is that much difference. The year of the engine determines timing requirements, however since this engine has a NON-STOCK camshaft that timing setting is useless. At 600 RPM depending on the size of the cam it may hardly idle at all. What size cam do you have?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
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
New User
Joined: Jan 2008
Posts: 0
Likes: 24
I run my 69 429 at 6* due to the elevation here of about 3000 ft ASL.
The 71 429 (375 hp 4v) sets at 10* BTC
Now you see why we suggest to users who are building a 460 to buy the 68-71 Timing gears & chain due to the fact that it doesn't have the built-in 8* retard gear like the
smog 460's
One of the biggest problems happen when people who do the tune-up, they set the carb first instead of the mechanical parts.(ie: Points,Static Timing,vacuum advance disconnect)
This thread will be moved to the 385 engine series forum
The 71 429 (375 hp 4v) sets at 10* BTC
Now you see why we suggest to users who are building a 460 to buy the 68-71 Timing gears & chain due to the fact that it doesn't have the built-in 8* retard gear like the
smog 460's
One of the biggest problems happen when people who do the tune-up, they set the carb first instead of the mechanical parts.(ie: Points,Static Timing,vacuum advance disconnect)
This thread will be moved to the 385 engine series forum
Thread
Thread Starter
Forum
Replies
Last Post
jomull55
1973 - 1979 F-100 & Larger F-Series Trucks
10
Oct 11, 2014 02:25 PM
retro48/52
1948 - 1956 F1, F100 & Larger F-Series Trucks
40
Oct 2, 2013 06:48 PM
7mpg302
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
12
Dec 3, 2008 06:17 PM
79supercab4x4
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
11
Apr 24, 2001 09:43 PM