Over fueling
Thread Starter
|
New User
Joined: Apr 2009
Posts: 12
Likes: 0
Over fueling
G-day Duane here from Perth Australia.
We are in a spot of bother here with my truck 2003 7.3 power stroke .its been over fueling at low revs then it started a knocking noise in the motor .Since then we have changed the oil pressure sensor and the noise went but the motor is still blowing white smoke like a steam train .We have changed the computer module with another vehicle but no luck .Does anyone have any ideas of things we can check or change to rectify this pproblem any info will be valued we are stumped . Thanks for your time rgds Duane.
We are in a spot of bother here with my truck 2003 7.3 power stroke .its been over fueling at low revs then it started a knocking noise in the motor .Since then we have changed the oil pressure sensor and the noise went but the motor is still blowing white smoke like a steam train .We have changed the computer module with another vehicle but no luck .Does anyone have any ideas of things we can check or change to rectify this pproblem any info will be valued we are stumped . Thanks for your time rgds Duane.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
I would start by checking for Blowby. I know Trey has a good video of the simple test, or you could start by flipping the oil fill cap over while idling and see if it blows off. If so a compression test would be in order.
Another possibility would be a split nozzle on an injector.
Another possibility would be a split nozzle on an injector.
9 ECHO 1
Joined: Aug 2009
Posts: 12,467
Likes: 58
From: Missouri
Thread Starter
|
New User
Joined: Apr 2009
Posts: 12
Likes: 0
cheers
Thanks for the reply fellows . we have checked the blow by thats all good the split injector we are going to look for if nothing else pops up .We really are grasping at straws .We are going to check the engine temp sensor as well .
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Trending Topics
Thread Starter
|
New User
Joined: Apr 2009
Posts: 12
Likes: 0
G-day yeah coolant is good this white smoke stink of unburnt deisel when the revs go up it clears and then comes back at idle .cheers
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
Cargo Master
Joined: Jan 2002
Posts: 2,079
Likes: 11
From: LA and CO
Sounds like a broken injector tip. Crank it up and open the fuel bowl drain to bleed off fuel pressure to see if the white smoke stops or at least is reduced. Definitely sounds like a broken tip though.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Get hold of an IR temperature gun. Point it at the exhaust manifold adjacent to each cylinder. If it is an injector over fueling the problem cylinder should register a lower temp. This should help to narrow it down so you don't have to pull all the injectors. This works best when engine is cold and the exhaust manifold has not been heat saturated.
It doesn't necessarily have to be a cracked injector nozzle. It might be an injector, for whatever reason, that is not properly atomizing the fuel.
It doesn't necessarily have to be a cracked injector nozzle. It might be an injector, for whatever reason, that is not properly atomizing the fuel.
Senior User
Joined: Sep 2009
Posts: 366
Likes: 0
G-day Duane here from Perth Australia.
We are in a spot of bother here with my truck 2003 7.3 power stroke .its been over fueling at low revs then it started a knocking noise in the motor .Since then we have changed the oil pressure sensor and the noise went but the motor is still blowing white smoke like a steam train .We have changed the computer module with another vehicle but no luck .Does anyone have any ideas of things we can check or change to rectify this pproblem any info will be valued we are stumped . Thanks for your time rgds Duane.
We are in a spot of bother here with my truck 2003 7.3 power stroke .its been over fueling at low revs then it started a knocking noise in the motor .Since then we have changed the oil pressure sensor and the noise went but the motor is still blowing white smoke like a steam train .We have changed the computer module with another vehicle but no luck .Does anyone have any ideas of things we can check or change to rectify this pproblem any info will be valued we are stumped . Thanks for your time rgds Duane.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
i had these symptons. took months of trial and error. Even went as far as a new engine. New engine didn't come with injectors. I used my old injectors. fired it up and had the same exact problems as with the old engine. I actually put stage 1 split injectors in as a modification and it ran perfect.
Of course you have to get a tune to run split injectors in a 2001.
But those damn injectors can mimic many situations such as blowby, choppy idle, smoke at idle but not at speed, etc etc.
Of course you have to get a tune to run split injectors in a 2001.
But those damn injectors can mimic many situations such as blowby, choppy idle, smoke at idle but not at speed, etc etc.