Cylinder Cont. test
Thread Starter
|
New User
Joined: Oct 2008
Posts: 21
Likes: 0
Cylinder Cont. test
Well I'm trying to figure this truck out yet. Took it in today and had it scanned. No codes, buzz test was ok, but cannot do a cyl. cont test. Is there something else that needs to be done to do one? I made a HPOP gauge, tested the pres, 550 psi at idle, 1500 psi WOT no load, spikes to 2650 psi WOT under load. Bought new UVWH to put in later today, we'll see if that helps at all.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Well I'm trying to figure this truck out yet. Took it in today and had it scanned. No codes, buzz test was ok, but cannot do a cyl. cont test. Is there something else that needs to be done to do one? I made a HPOP gauge, tested the pres, 550 psi at idle, 1500 psi WOT no load, spikes to 2650 psi WOT under load. Bought new UVWH to put in later today, we'll see if that helps at all.
Thread Starter
|
New User
Joined: Oct 2008
Posts: 21
Likes: 0
Misfire from about 1800 rpm to 3000 rpm under load or not. The scanner said the oil temp was not high enough, the truck had been running for about three hours. Ordered a new temp sensor them we'll try again. Replaced o-rings on injectors, but did not help.
Posting Guru
Joined: Dec 2005
Posts: 1,034
Likes: 0
Unfortanitly we do not have the option with our truck, we have a contibution test yes and are fine but can be difficult for intermittant problem injectors. The cummins has a contribution test but at times will not find the problem.
I'm not on the computer that much but when you do get your scanner to work and if the contribution test does not work for you another way you can possible do this which will be a big PAIN IN THE A$$ is to unbolt your valve covers, dissconnect each injector one at a time and drive the truck under load, when you get to the rpm you encounter your problem you will be down 2 injectors, when you finally come across an unplugged injector and it still only feels like you have one cylinder down, you found your faulty injector. Just remeber every time you take for a test drive you may want to throw a couple bolts in the valve cover cause you will lose alot of oil.
Thread Starter
|
New User
Joined: Oct 2008
Posts: 21
Likes: 0
ahhh, I've encountered this problem on a cummins, I've actually had to do a cylinder cut out test which cuts out one cylinder at a time manually. you'll run one cylinder down and cut out another having 2 cylinders down untill you find the faulty cylinder you want to cut out.
Unfortanitly we do not have the option with our truck, we have a contibution test yes and are fine but can be difficult for intermittant problem injectors. The cummins has a contribution test but at times will not find the problem.
I'm not on the computer that much but when you do get your scanner to work and if the contribution test does not work for you another way you can possible do this which will be a big PAIN IN THE A$$ is to unbolt your valve covers, dissconnect each injector one at a time and drive the truck under load, when you get to the rpm you encounter your problem you will be down 2 injectors, when you finally come across an unplugged injector and it still only feels like you have one cylinder down, you found your faulty injector. Just remeber every time you take for a test drive you may want to throw a couple bolts in the valve cover cause you will lose alot of oil.
Unfortanitly we do not have the option with our truck, we have a contibution test yes and are fine but can be difficult for intermittant problem injectors. The cummins has a contribution test but at times will not find the problem.
I'm not on the computer that much but when you do get your scanner to work and if the contribution test does not work for you another way you can possible do this which will be a big PAIN IN THE A$$ is to unbolt your valve covers, dissconnect each injector one at a time and drive the truck under load, when you get to the rpm you encounter your problem you will be down 2 injectors, when you finally come across an unplugged injector and it still only feels like you have one cylinder down, you found your faulty injector. Just remeber every time you take for a test drive you may want to throw a couple bolts in the valve cover cause you will lose alot of oil.
Trending Topics
Elder User
Joined: Sep 2003
Posts: 892
Likes: 3
From: Quinton NJ
ahhh, I've encountered this problem on a cummins, I've actually had to do a cylinder cut out test which cuts out one cylinder at a time manually. you'll run one cylinder down and cut out another having 2 cylinders down untill you find the faulty cylinder you want to cut out.
Unfortanitly we do not have the option with our truck, we have a contibution test yes and are fine but can be difficult for intermittant problem injectors. The cummins has a contribution test but at times will not find the problem.
I'm not on the computer that much but when you do get your scanner to work and if the contribution test does not work for you another way you can possible do this which will be a big PAIN IN THE A$$ is to unbolt your valve covers, dissconnect each injector one at a time and drive the truck under load, when you get to the rpm you encounter your problem you will be down 2 injectors, when you finally come across an unplugged injector and it still only feels like you have one cylinder down, you found your faulty injector. Just remeber every time you take for a test drive you may want to throw a couple bolts in the valve cover cause you will lose alot of oil.
Unfortanitly we do not have the option with our truck, we have a contibution test yes and are fine but can be difficult for intermittant problem injectors. The cummins has a contribution test but at times will not find the problem.
I'm not on the computer that much but when you do get your scanner to work and if the contribution test does not work for you another way you can possible do this which will be a big PAIN IN THE A$$ is to unbolt your valve covers, dissconnect each injector one at a time and drive the truck under load, when you get to the rpm you encounter your problem you will be down 2 injectors, when you finally come across an unplugged injector and it still only feels like you have one cylinder down, you found your faulty injector. Just remeber every time you take for a test drive you may want to throw a couple bolts in the valve cover cause you will lose alot of oil.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
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
Lead Driver
Joined: May 2007
Posts: 8,608
Likes: 13
From: Belair md
the cylinder contribution test wont run until engine oil reaches 170 degrees...not 140...lol.
if the scanner does all the other tests then it should have a choice for that one as well. if not then your best bet may be doing it manually as described above
if the scanner does all the other tests then it should have a choice for that one as well. if not then your best bet may be doing it manually as described above
Thread Starter
|
New User
Joined: Oct 2008
Posts: 21
Likes: 0
IT does have the choice for it, it will not let you do it though. I wonder if the oil temp sensor s not working correctly, or its just not hot enough.
Thread
Thread Starter
Forum
Replies
Last Post
UNTAMND
1987 - 1996 F150 & Larger F-Series Trucks
10
Jul 7, 2024 02:08 PM
dn29626
1999 - 2003 7.3L Power Stroke Diesel
35
Nov 18, 2009 07:43 PM