02 7.3L rough idle
Thread Starter
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4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
02 7.3L rough idle
So I've been having this rough idle problem since installing my Swamps 200/100 injectors. Injectors where brand new along with UVCH, motorcraft ipr and icp. My problem is once the truck gets up to operating temp it will have a slight miss at idle only. And is a little sluggish taking off. Hpop pressure is good. I've thrown so many parts at it trying to figure it out. Any help would be greatly appreciated!!
New parts,
IPR
ICP
ICP pigtail
CPS
EOT
MAT
Fuel pressure regulator on fuel bowl
Fuel filter
New optima yellow top batteries
New alternator
New flex plate
Upgrades
Swamps 200/100 injectors
Garret GTP38R turbo
Non-ebpv pedestal
Non-ebpv turbine outlet
Airaid cold air intake
John Woods Street Performance Trans
Mag-hytec all around
4.56 gears
Boost, pyro, trans, and hpop pressure gauges
Superlift 10" lift
40" Nitto Trail Grapplers
New parts,
IPR
ICP
ICP pigtail
CPS
EOT
MAT
Fuel pressure regulator on fuel bowl
Fuel filter
New optima yellow top batteries
New alternator
New flex plate
Upgrades
Swamps 200/100 injectors
Garret GTP38R turbo
Non-ebpv pedestal
Non-ebpv turbine outlet
Airaid cold air intake
John Woods Street Performance Trans
Mag-hytec all around
4.56 gears
Boost, pyro, trans, and hpop pressure gauges
Superlift 10" lift
40" Nitto Trail Grapplers
Thread Starter
|
4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
I am using swamps tunes that came with the injectors.
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
First, let me say WELCOME to FTE!!!
Second, it sounds like quite a nice build. We like pics
Third...oh yeah, your questions...
Have you done any intank mods yet? Hutch mod, replaced lines from tank to intake side of fuel pump?
The internals tend to break down, especially with ULSD they introduced after our production vehicles, and it sucks air.
It may or may not be the main cause of your sputtering, but DEFINITELY needs to be addressed. Injectors hate air.
Do you have a fuel pressure gauge? Strongly recommended. I currently have a post filter gauge, but am going to add a pre filter gauge, too. That way I can check the state and health of the fuel filter at any time- especially if there is anything unusual going on.
I'm not an injector expert, but from what I've read those are pretty large and require careful tuning to get them to "behave" under low load and idling. That all requires steady fuel, too.
Second, it sounds like quite a nice build. We like pics
Third...oh yeah, your questions...
Have you done any intank mods yet? Hutch mod, replaced lines from tank to intake side of fuel pump?
The internals tend to break down, especially with ULSD they introduced after our production vehicles, and it sucks air.
It may or may not be the main cause of your sputtering, but DEFINITELY needs to be addressed. Injectors hate air.
Do you have a fuel pressure gauge? Strongly recommended. I currently have a post filter gauge, but am going to add a pre filter gauge, too. That way I can check the state and health of the fuel filter at any time- especially if there is anything unusual going on.
I'm not an injector expert, but from what I've read those are pretty large and require careful tuning to get them to "behave" under low load and idling. That all requires steady fuel, too.
Thread Starter
|
4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
First, let me say WELCOME to FTE!!!
Second, it sounds like quite a nice build. We like pics
Third...oh yeah, your questions...
Have you done any intank mods yet? Hutch mod, replaced lines from tank to intake side of fuel pump?
The internals tend to break down, especially with ULSD they introduced after our production vehicles, and it sucks air.
It may or may not be the main cause of your sputtering, but DEFINITELY needs to be addressed. Injectors hate air.
Do you have a fuel pressure gauge? Strongly recommended. I currently have a post filter gauge, but am going to add a pre filter gauge, too. That way I can check the state and health of the fuel filter at any time- especially if there is anything unusual going on.
I'm not an injector expert, but from what I've read those are pretty large and require careful tuning to get them to "behave" under low load and idling. That all requires steady fuel, too.
Second, it sounds like quite a nice build. We like pics
Third...oh yeah, your questions...
Have you done any intank mods yet? Hutch mod, replaced lines from tank to intake side of fuel pump?
The internals tend to break down, especially with ULSD they introduced after our production vehicles, and it sucks air.
It may or may not be the main cause of your sputtering, but DEFINITELY needs to be addressed. Injectors hate air.
Do you have a fuel pressure gauge? Strongly recommended. I currently have a post filter gauge, but am going to add a pre filter gauge, too. That way I can check the state and health of the fuel filter at any time- especially if there is anything unusual going on.
I'm not an injector expert, but from what I've read those are pretty large and require careful tuning to get them to "behave" under low load and idling. That all requires steady fuel, too.
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
Bent the line to shape, installed new pickup foot, eliminated the screens. Some nice writeups on here.
I have mine in one of my threads, but can't lay my hands on it at the moment, LOL
Trending Topics
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
Have you seen this video, emptying my tank with the fuel pump before the intank mod?
See all the air and glops of fuel delivery? I'm told the iPhones don't show the annotations which have the details.
I was horrified at how BAD the air and delivery was!
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It's a Van Gogh
Joined: Feb 2010
Posts: 7,812
Likes: 1,335
From: Elk Grove, CA
Forscan or Torque Pro or similar can help with some info, like a PERDELS test to show which cylinders are misbehaving. Time for some diagnosis to go along with all the new parts.
Sounds like it's going to be a fun truck once it's sorted out!
Sounds like it's going to be a fun truck once it's sorted out!
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I'm thinking "air" not volume. If the fuel supply isn't dead-on stable, those big injectors are gonna cough and sputter.
Have you seen this video, emptying my tank with the fuel pump before the intank mod?
See all the air and glops of fuel delivery? I'm told the iPhones don't show the annotations which have the details.
I was horrified at how BAD the air and delivery was!
Have you seen this video, emptying my tank with the fuel pump before the intank mod?
See all the air and glops of fuel delivery? I'm told the iPhones don't show the annotations which have the details.
I was horrified at how BAD the air and delivery was!
Thread Starter
|
4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
I'm thinking "air" not volume. If the fuel supply isn't dead-on stable, those big injectors are gonna cough and sputter.
Have you seen this video, emptying my tank with the fuel pump before the intank mod?
Ford Excursion 7.3L Diesel Air In Fuel Line Pre-Hutch Mod - YouTube
See all the air and glops of fuel delivery? I'm told the iPhones don't show the annotations which have the details.
I was horrified at how BAD the air and delivery was!
Have you seen this video, emptying my tank with the fuel pump before the intank mod?
Ford Excursion 7.3L Diesel Air In Fuel Line Pre-Hutch Mod - YouTube
See all the air and glops of fuel delivery? I'm told the iPhones don't show the annotations which have the details.
I was horrified at how BAD the air and delivery was!
Post Fiend
Joined: Mar 2015
Posts: 5,277
Likes: 32
From: Blairsville, Pennsylvania
This is why many of us replace the fuel line between the tank and the pump. Apparently the QD fittings are fine with pressure, just not as good with suction and air.
At least that is how it was explained to me
Then there is the duckbill in the tank...
Thread Starter
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4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
I'll have to check the injector o rings. Unfortunately I do not have the equipment or the money to do a compression test at this time. But I do know when I last had the compression tested it was when I first bought it and the shop said it was perfect.
Thread Starter
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4wd Low
Joined: Jun 2014
Posts: 12
Likes: 0
The quick disconnect fuel fittings are sealed with an oring. That whole thing gets fatigued and allows air to get sucked in through there while drawing fuel from the tank, then BAM- the line gets sucked tight against the fitting and no more air....until the suction drops again.
This is why many of us replace the fuel line between the tank and the pump. Apparently the QD fittings are fine with pressure, just not as good with suction and air.
At least that is how it was explained to me
Then there is the duckbill in the tank...
This is why many of us replace the fuel line between the tank and the pump. Apparently the QD fittings are fine with pressure, just not as good with suction and air.
At least that is how it was explained to me
Then there is the duckbill in the tank...