+18 SFT on #2 - Ford Powerstroke Diesel Forum
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  #1  
Old 07-20-2012, 01:51 PM
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+18 SFT on #2

Truck came in, #2 contribution. Injector did not buzz. Replaced injector. Now buzzed but ran worse. Installed another injector, ran the same. Did a compression check, 430 PSI. Found faulty rockers, pushrods, bridges and lifters. Installed all new, now #2 is back to +18 on the short fuel trim.

the only thing I can think of is the cylinder is washed down and or the rings. but when I had the heads off, it looked fine, crosshatches were great...

any suggestions?
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  #2  
Old 07-22-2012, 05:53 AM
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did you actually change the lifter or see the old one? If it was damaged on the roller end assume the same damage was done to the camshaft lobe
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Old 07-23-2012, 01:17 PM
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no, roller ends were fine, it was just the circlip that held the top portion in, so I replaced all while heads were off.
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Old 07-24-2012, 05:09 PM
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#2 is a known hot cylinder. between it and #8 they both result in the majority of 6.4 base engine failures. Based on what you said I'd be wondering if the original injector failed in a manner that damaged the engine

you didn't happen to check the piston protrusion while the head was off? usually if a rod was tweaked you'd know it by now but maybe not.

when you cancel the #2 injector it definitely drops rpm at idle? I know you said manual compression was good but what does relative compression show?
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Old 08-20-2012, 03:06 PM
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haha I'm so screwed. I had to come find this thread. I've got one right now that I just put EGR coolers and a radiator in that's now running fine other than a skip on #2. Relative compression all 100%. Manual compression for that bank all showing 320psi (typical). short fuel trim is +19. Haven't pulled the valve cover yet.

Total horizontal cooler failure but it gave me no indication that it ever hydrolocked. Cranking was smooth and even.
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Old 08-20-2012, 03:08 PM
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I doubt its a cylinder issue. Take your fuel sample at your injector feed tube and show me the metal!!!
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  #7  
Old 08-20-2012, 03:26 PM
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is that what you found? It's been about a year since i saw any metal in the fuel
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Old 08-20-2012, 03:28 PM
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Not on this one, but I started taking samples and sure enough in about every 6.4 I've had pass through there was brass, and plenty of it.
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Old 08-20-2012, 03:34 PM
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so what was wrong with the one this thread was about?
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  #10  
Old 08-20-2012, 04:46 PM
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2bum injector... off brand. put ford one in, gone.
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