7.3 idi stalling
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
7.3 idi stalling
76 F350 w/transplant 7.3 IDI, vehicle sat in SW desert for 4yrs...got vehicle running, seems good, however on a couple of occassions while driving at highway speeds, after 20 miles or so, she started to seem to lose power/surge and finally stalled. Prior to putting her on road, I installed new filter/water seperator, and mechanical lift pump, is also has a functioning electric pump, near chassis mounted fuel tank. Truck has yet to see many hours of operation other than some local driving in small town, other than the couple of trips 25-30miles, and thats when issues occured. Looking for thoughts on diagnosis...
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
I presume that its an original 76' tank, I didnt do the work, but what ur saying makes good sense, since I dont have an accurate gauge (needle moves around alot) so maybe I'll have to look into fixing the gauge and follow that thought...btw, any help on where to start looking for the fuel gauge issue?
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
I cant answer why there is two pumps, it could it be that the previous owner installed the electric due to the exact problem I mentioned on this thread...I think, I'll just disconnect the electric, and fill the tank to the top then see if air intrusion is solved.
Senior User
Joined: Sep 2007
Posts: 369
Likes: 0
From: halstead,Ks
On the plus side if the electric pump is at the back Your suction line is in good shape.
Or You’d have a leak. The cure is a surge tank. A small tank between Your electric pump and Your lift pump.
It gives air a place to separate out and go back in a return line to the tank.
Or You’d have a leak. The cure is a surge tank. A small tank between Your electric pump and Your lift pump.
It gives air a place to separate out and go back in a return line to the tank.
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
local shop here in AZ tells me that its my injector pump that is causing the stalls? someone else said its the injector caps, o-rings requiring new injector install kit. let it be known that I'm confused.
Trending Topics
Posting Guru
Joined: Oct 2010
Posts: 1,199
Likes: 1
From: Missouri
First check for any obvious dry rotted fuel lines then "I" would put a clear fuel filter somewhere close to the engine, and see if get's a bunch of little air bubbles going into it. Or see what happens the next time the engine quits. Or you can just go ahead and check the tank as suggested above.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
it starts up again, I generally wait 10 minutes or so...did some checking today on fuel delivery, found that a stream of bubbles(especially at higher rpm) are coming thru fuel line from mechanical pump up to water seperator/filter. and btw, this stalling has only occured a few times as I have not had it on the road many times at highway speeds.
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
is the best repair route to install a surge tank as u suggested? or replacing/repairing all obvious rubber hose connectors? I was viewing ur gallery photos and noticed that the fuel tank on ur 67' was at the rear of truck, as mine is located closer to cab running parallel to frame rail as opposed to crossover like yours. ur truck looks very nice BTW...and thanks to all who have responded with there input!
Senior User
Joined: Sep 2007
Posts: 369
Likes: 0
From: halstead,Ks
That front tank is real bad about letting air in. My back tank is a biger 25gl and it dose much better. A surge tank is all I have come up with. Here is a link to one.
Aluminum Universal Fuel Surge Tank MIATA RX7 RX8 GTI | eBay
Aluminum Universal Fuel Surge Tank MIATA RX7 RX8 GTI | eBay
Thread Starter
|
New User
Joined: Sep 2011
Posts: 17
Likes: 0
From: North Central AZ
[quote=1967 Turbo 6.9;10842236]That front tank is real bad about letting air in. My back tank is a biger 25gl and it dose much better. A surge tank is all I have come up with. Here is a link to one.
Aluminum Universal Fuel Surge Tank MIATA RX7 RX8 GTI | eBay[/quodid u encounter a similar problem with ur install of the 6.9? and found that similar problem, or had u the knowledge forehand? again I thank u for ur sound advice! my rear tank was removed so a stinger(wheel lift for car tow) was installed there, hence no room.
Aluminum Universal Fuel Surge Tank MIATA RX7 RX8 GTI | eBay[/quodid u encounter a similar problem with ur install of the 6.9? and found that similar problem, or had u the knowledge forehand? again I thank u for ur sound advice! my rear tank was removed so a stinger(wheel lift for car tow) was installed there, hence no room.
Senior User
Joined: Sep 2007
Posts: 369
Likes: 0
From: halstead,Ks
Yes My 67 accelerates so hard that on the front tank anything less than ¾ full the truck will just die.
The 74 anything less than ½ tank on a back tank and going around a corner to fast it will just die.
The 74 anything less than ½ tank on a back tank and going around a corner to fast it will just die.