Will a bad injector cause cylinder wear? - Ford Powerstroke Diesel Forum
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Old 01-10-2012, 06:42 PM
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Will a bad injector cause cylinder wear?

My truck recently started to hesitate and shudder under interstate speeds, and now rough idle. 04 6.0 with 168K does not have an egr delete. I've had it for about two months and the previous owner told me the ficm was replaced a little over a year ago. I took it to a 6.0 mechanic who put it on the machine and told me that the #4 injector was bad. He only charged me $40. It does not smoke, which leads me to believe it is not putting out enough fuel, my question is, will a bad injector cause a cylinder wall to score from lack of fuel? I plan to order some rev-x, and a edge insight cts and start all the necessary checks.
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Old 03-03-2012, 11:58 AM
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injectors go out in lotsa ways, but it is always either mechanical or electrical. there are several mechanical ways. few electrical ways but they are the most common. there are two test to run, a contribution test which is mainly if an obd code hasn't set, check each cylinder's out put, low out put either means a leak, or mechanical failure of the injector. a buzz test checks each injector at a time for electrical response. which test did you have? as for scouring the piston wall, i don't THINK so. i've had injectors going out for a long time and when it was changed all problems went away. 6 mos down the road hg time, and cylinders look fine to me. I have 7 6.0's in my fleet, hate that i love each one so much
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Old 03-03-2012, 12:17 PM
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not directly but #5(the cylinder that fires after number #4) is going to have to inject more fuel and work harder to keep the engine up to speed.

It's true most injectors fail in a way that doesn't harm the engine but I'd never be the one to take that chance. Get it replaced ASAP
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Old 03-03-2012, 07:51 PM
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Well I have never seen one do it from not enough fuel, but one that is putting too much fuel can wash out the oil in the rings and cause scoreing of the cylinder walls.
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Old 05-08-2012, 11:01 PM
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i know this is a tad old but yes, just did a comp test on a 6.0 that came in with a bad injector and its hardly moving the needle on the compression gauge.
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Old 05-09-2012, 03:36 AM
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I appreciate the responses, I know mine is underfeuling. That is mostly what I was concerned about. I know about the damage caused with overfueling. I still have not changed the injector yet. I quit driving it. I plan to change it soon. I ohm checked the injector last week and the open coil is bad.

Sent from my SCH-I500
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