Engine Vibration
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Senior User
Joined: May 2009
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From: Colorado Springs Colorado
What kind of exhaust pipe issue would you suspect? Along wiht the fuel pressure issue the tech also found a injectors 4, and 6 have a small miss when hot, 2, and 8 are intermittant. I can only assume that this is waht is causing the vibration in the engine at idle. When injectors start missing, is it because of the spool valves not moving(sticking, or bad coil, ect.), or can it also be from an issue on the fuel side of business?
Tuned
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What kind of exhaust pipe issue would you suspect? Along wiht the fuel pressure issue the tech also found a injectors 4, and 6 have a small miss when hot, 2, and 8 are intermittant. I can only assume that this is waht is causing the vibration in the engine at idle. When injectors start missing, is it because of the spool valves not moving(sticking, or bad coil, ect.), or can it also be from an issue on the fuel side of business?
Last edited by ramsay; Mar 4, 2011 at 07:09 AM. Reason: clarity
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From: Colorado Springs Colorado
I find it a bit strange that all the injector issues are in the same of cylinders....Is it possible there is a restriction in the fuel line to that side? Perhaps something in the check valve at the front.... Or could there be a small oil leak in the dummy plug or stand pipe on that side?
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
A little coincidental, but I don't think it may be all that odd. I suppose there could be a fuel restiction on that side, and where is the ckeck valve? A picture would be nice. Also I don't know a whole lot about fluid dynamics, but I think if there is a leak in a hydraulic system it effects the entire sysyem, and brings down the pressure across all points. I could be wrong on that theory though.
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From: Colorado Springs Colorado
The check valve is in and part of the banjo bolt that holds the fuel line to the front of the head. Lots of people remove them and drill the banjo bolts for more fuel flow or get the 6.4 bolts which don't even have them. I'd be more inclined to look for an HPO leak in that oil rail before replacing 4 injectors, but it's very possible and wouldn't be the first engine to have all 4 replaced on one side.
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
bolts (part# W302472), 4 crush washers (W303659),
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From: Colorado Springs Colorado
I got another question. The engine vibration still exists, but it does not really seem to be the engine itself. At idle all the vibration seems to be coming from the turbo. You can literaly see the turbo vibrating, and feel it through all attached components. At high idle, and increased engine RPM it goes away. Would missing injectors cause such a phenominon? Or is there something else I should be looking at?
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More Turbo
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Manual trans? If so, be sure to eliminate the dual mass flywheel. I do not know if your year uses the dual mass with manual trans, but we had one fail on an older truck and it created an intermittent vibration at idle.
Also- I'd sort out fuel pressure w/ upgrade kit before spending big money on FICM and injectors.
Last- I would do whatever cheeseit says.
-mike
Also- I'd sort out fuel pressure w/ upgrade kit before spending big money on FICM and injectors.
Last- I would do whatever cheeseit says.
-mike
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Senior User
Joined: May 2009
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From: Colorado Springs Colorado
Manual trans? If so, be sure to eliminate the dual mass flywheel. I do not know if your year uses the dual mass with manual trans, but we had one fail on an older truck and it created an intermittent vibration at idle.
Also- I'd sort out fuel pressure w/ upgrade kit before spending big money on FICM and injectors.
Last- I would do whatever cheeseit says.
-mike
Also- I'd sort out fuel pressure w/ upgrade kit before spending big money on FICM and injectors.
Last- I would do whatever cheeseit says.
-mike
Post Fiend
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I got another question. The engine vibration still exists, but it does not really seem to be the engine itself. At idle all the vibration seems to be coming from the turbo. You can literaly see the turbo vibrating, and feel it through all attached components. At high idle, and increased engine RPM it goes away. Would missing injectors cause such a phenominon? Or is there something else I should be looking at?
Tell me where you got the turbo and who put it in if it was not stock.
I am worried.
A good bud on here had a piece come off the vanes, ended up in a cylinder and damaging the engine.
Needless to say, I now don't touch used / reman turbos unless it is a Ford OEM part or otherwise reputable.
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Senior User
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From: Colorado Springs Colorado
Tell me where you got the turbo and who put it in if it was not stock.
I am worried.
A good bud on here had a piece come off the vanes, ended up in a cylinder and damaging the engine.
Needless to say, I now don't touch used / reman turbos unless it is a Ford OEM part or otherwise reputable.
I am worried.
A good bud on here had a piece come off the vanes, ended up in a cylinder and damaging the engine.
Needless to say, I now don't touch used / reman turbos unless it is a Ford OEM part or otherwise reputable.
When it comes to the injectors, if they are missing at idle could it cause uneven/varied exhaust pressure which would lead to the vibration?
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Senior User
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From: Colorado Springs Colorado
With the proper diagnostic software/tools is it possible to actuate the VGT vains at idle to shift the turbo RPM, and see if the vibration changes? Or is there any other way to manualy sweep the vains while at idle? I think this would be an interesting test to see what changes.