Missing when cold
Thread Starter
|
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
Missing when cold
With the lower temps here I have a small issue that has poppped up. When I start my truck in the morning if I just let it idle its fine. If I use my high idle tune or my AIC to bump up the idle speed, it sounds like its missing and shakes. No codes, I haven't had time to do a CCT or anything else. I haven't retorqued my injectors since installing them roughly 3k ago so I might try that. Any other suggestions?
Thread Starter
|
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
I haven't plugged in yet. Running Delo 15w40.
Posting Guru
Joined: Nov 2003
Posts: 2,214
Likes: 0
From: THUNDER BAY
How did you hydro lock the motor ? just curious and I would like to add that my truck has had this same Issue since I have owned it I now have a bad Injector that is leaking Internally do you notice a power loss when the trucks oil gets up to temp?
I set my AIC at 1350rpm and that seems to smooth out the high Idle but anything under that and it seems to miss except Idle
I set my AIC at 1350rpm and that seems to smooth out the high Idle but anything under that and it seems to miss except Idle
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
How bad is the miss and shake? If you drive it cold, does the miss get worse? Low on power? No miss at all when warm? Have you checked blowby? Hydrolocking the motor can be bad, so we'll keep our fingers crossed.
Where did you get the injectors from? There's always a chance that one or two are not firing when cold. Maybe pull the valve covers and watch for oil discharge or leaks at the injectors when you start it cold.
Not torquing down the injectors in 3,000 miles shouldn't make it idle rough unless you used bubble gum for injector o-rings. I don't remember you getting new injectors. Did you upgrade? Did you get your tunes re-burned for the new injectors?
Where did you get the injectors from? There's always a chance that one or two are not firing when cold. Maybe pull the valve covers and watch for oil discharge or leaks at the injectors when you start it cold.
Not torquing down the injectors in 3,000 miles shouldn't make it idle rough unless you used bubble gum for injector o-rings. I don't remember you getting new injectors. Did you upgrade? Did you get your tunes re-burned for the new injectors?
Fleet Owner
Joined: Aug 2004
Posts: 20,419
Likes: 197
From: AZ
I don't mean to be a smart *** but after 80K do you think its time I retorqued my injectors? What I'm doing now is showing my ignorance, didn't know you had to retorqued them?
Trending Topics
Hotshot
Joined: Oct 2003
Posts: 17,799
Likes: 103
From: Ashland City, TN
I think its more for piece of mind than anything.
I've asked guys when I had the VC's off if I should, and they told me it wasn't a big deal.
If you were making big power, I would think it was a good idea.
*shrugs*
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
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
Thread Starter
|
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
Not bad, you can feel it from the drivers seat and the stick shakes a little bit. You can also hear it from outside.
No, its less noticeable when driving.
Nope
Nope
Not recently, last time I did was shortly after the injectors went in.
Hypermax
Yes, stage 1's, with brand new Alliant O-rings
The chip was setup for the injectors from the get-go. Tyrant tunes on a TS6 chip.
This morning when I started it I think it was a bit warmer than yesterday, but there was about 2.5" of wet heavy snow on the truck. It lit off fine, I let it idle for maybe 2 minutes at the factory idle, then kicked it up to 1300 with the AIC and no miss. That was after roughly 13 hours of being parked.
Just to help flesh out the story, when I put the injectors in I didn't have my glow plug "tool" so I called a friend/fellow PSD owner/Ford tech. He told me to just spin it over without the glow plugs or injectors installed to clear it out, so thats what I did. Installed the GP's, installed the injectors, then when I hit the key it barely turned at all. I hit the key 4-5 more times before it finally turned over. It runs fine when its warm, and I believe I did a CCT shortly after the injectors were installed and there were no issues.
No, its less noticeable when driving.
Nope
Nope
Not recently, last time I did was shortly after the injectors went in.
Hypermax
Yes, stage 1's, with brand new Alliant O-rings
The chip was setup for the injectors from the get-go. Tyrant tunes on a TS6 chip.
This morning when I started it I think it was a bit warmer than yesterday, but there was about 2.5" of wet heavy snow on the truck. It lit off fine, I let it idle for maybe 2 minutes at the factory idle, then kicked it up to 1300 with the AIC and no miss. That was after roughly 13 hours of being parked.
Just to help flesh out the story, when I put the injectors in I didn't have my glow plug "tool" so I called a friend/fellow PSD owner/Ford tech. He told me to just spin it over without the glow plugs or injectors installed to clear it out, so thats what I did. Installed the GP's, installed the injectors, then when I hit the key it barely turned at all. I hit the key 4-5 more times before it finally turned over. It runs fine when its warm, and I believe I did a CCT shortly after the injectors were installed and there were no issues.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Chase got this from the SD section. Kwikkordead noticed that he had several loose injectors on his truck when he checked them with a torque wrench. Others decided to check there's too and almost everyone who has checked has found at least one or two injectors loose. I don't know if it's a SD issue, or just the o-rings settling in and needing to be snugged up a little better. With split shot injectors, you can hear the engine get more quite after you re-torque them.
Does the miss change any in different tunes? I'd play with that and then call Cale and get his input. Getting the truck on AE would be helpful too.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
A bolt is a bolt ... If you are too stupid to properly torque an injector in the first place , you deserve to do it twice ...
Thread Starter
|
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
So it sounds like you've got a rough idle similar to what the gray CPS was causing when it first came out. Any time you deal with rebuilt injectors, there's always a chance something was missed or one doesn't flow right, or whatever else they may have go wrong.
Does the miss change any in different tunes? I'd play with that and then call Cale and get his input. Getting the truck on AE would be helpful too.
Does the miss change any in different tunes? I'd play with that and then call Cale and get his input. Getting the truck on AE would be helpful too.
If that was thrown at me, the injectors were torqued to spec when I installed them.
Thread
Thread Starter
Forum
Replies
Last Post
beef tits
1999 - 2003 7.3L Power Stroke Diesel
3
Jan 1, 2019 09:47 PM
imq707s
6.0L Power Stroke Diesel
11
Nov 12, 2018 03:00 PM
hfdbuck09
6.0L Power Stroke Diesel
17
Jan 8, 2011 07:35 PM
