two dead cylinders
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
two dead cylinders
I'm working on a '97 450 for a guy. The truck has supposedly had new injectors put in a while back. The trucks missing like crazy. He had a buzz test done and 3 is real quiet and 7 is completely dead. He had me take the valve cover off to put harnesses and a gasket on it. I checked the resistance once I had them off and they were all either .1 or .2 ohms. He had me put the harnesses and gasket on anyway. I just got it back together and nothing changed. I pulled the plug off the IDM and checked the resistance of the wires between the IDM and the valve covers for cylinders 3 and 7 one was .5 and one was .6. Is this too much resistance or is that in spec? Any other ideas? Thanks a lot for any info yall have thanks
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
not sure what the issue was with the injectors before. All he knows is that they were replaced about 10k miles ago. I did just do another buzz test though with auto enginuity and 7 is making noise now but its much quieter than the rest. 3 and 7 are both quieter than the other ones
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Have you watched them while engine running ,(oil spouts) ?...
Posting Guru
Joined: Nov 2001
Posts: 1,743
Likes: 2
From: Ft Scott
Yes! And to help isolate the problem you can swap solenoids from the injectors that are firing to the ones that aren't. That way you'll know if the problem follows the solenoid or stays with the injector.
Trending Topics
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
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
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
No I havent watched them while running or measured poppet clearance and I'm not sure how to do that. But to switch solenoids those first four screws on top are all I'll have to take off? Also, I'm assuming theres no reason I have to remove the injectors to switch the solenoids right?
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
There are other reason a buzz could be quiet like Rodney and Rick are talking about. It the poppet screw is loose the plate or screw could be hitting the solenoid before it has a chance to lift.
To swap solenoid yes there are just those 4 screws on top and the soleniod lifts off. To measure poppet clearance I will provide a link. You just need some .002-.004 feeler gauges once the solenoid if off.
DIY-Injectors.com
Click on the FAQ/tech link and go down to where is says "how to check armature clearance" and click the link.
To swap solenoid yes there are just those 4 screws on top and the soleniod lifts off. To measure poppet clearance I will provide a link. You just need some .002-.004 feeler gauges once the solenoid if off.
DIY-Injectors.com
Click on the FAQ/tech link and go down to where is says "how to check armature clearance" and click the link.
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
Well I switched the wires around and the quiet buzz stays with the suspect injector, so I guess I've got 2 bad injectors. I'm not gonna mess with switching the solenoids around because the whole injector is under warranty. Now I've just gotta get them out and have the guy send them off. I may have some questions about removing the injectors
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
Well I read 2 different writeups on injector removal. DIY injectors and beans diesel performace. DIY says to drain the crankcase, drain the HPOP and drain the oil galleys. I like Beans Diesels writeup a lot more because they're saying to just let everything drain into the back two cylinders as you pull the injectors and then take out the glowplug and crank the motor to clean it out when your done. I'd like to just do that, but do I really need to do all the other stuff? I'm only gonna be taking out 3 and 7. Also, is the copper washer thats on the bottom of the injector reusable?
Playing in the Dirt
Joined: Oct 2005
Posts: 2,302
Likes: 1
From: Southwest Georgia
You still have get the oil and fuel out of the cylinder when you pull an injector. I have pulled 1 or 2 injectors and when I reinstalled the injectors I removed the glow plugs for those cylinders, pulled the #9 MAXI fuse under the hood (to keep the IDM from firing) and then "with a remote start switch" NOT THE KEY, I bumped the starter over to clear the cylinder, make sure you have a heavy towel over the glow plug holes (the fluid comes out under high pressure). Of course this is not the correct recommended shop manual way, so do this at you own risk.
The copper gasket (washer) is a one time use crush gasket, not reusable.
The copper gasket (washer) is a one time use crush gasket, not reusable.
Thread Starter
|
Senior User
Joined: Feb 2006
Posts: 265
Likes: 0
From: Candler, NC
You still have get the oil and fuel out of the cylinder when you pull an injector. I have pulled 1 or 2 injectors and when I reinstalled the injectors I removed the glow plugs for those cylinders, pulled the #9 MAXI fuse under the hood (to keep the IDM from firing) and then "with a remote start switch" NOT THE KEY, I bumped the starter over to clear the cylinder, make sure you have a heavy towel over the glow plug holes (the fluid comes out under high pressure). Of course this is not the correct recommended shop manual way, so do this at you own risk.
The copper gasket (washer) is a one time use crush gasket, not reusable.
The copper gasket (washer) is a one time use crush gasket, not reusable.