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Power Strokes 1994-1997 General Technical discussion of topics related to vehicles powered by the Power Stroke engine in 1994 through 1997 models.

Thread: Suspected dirty injectors Reply to Thread
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  Topic Review (Newest First)
03-23-2019 03:55 AM
bluenavigator Been driving my truck two to four times during the week, to my work and back home. I am going to check fuel filter and DCA tomorrow. Will let y'all know more. Once in a while, engine shut down all of the sudden. I suspect CPS is flaky. Will replace it tomorrow. Have new one on hand.

Other than that, I am monitoring the vibration/stumble. When I change the gears, I pushed the clutch pedal in, it still vibrates. I would say that the transmission is not the issue but something else.
02-16-2019 03:56 AM
ArcticDriver My thought is keep using the 2nd filter.
02-15-2019 12:16 PM
bluenavigator Drove 90 miles and I checked the fuel filter. It is little dirty. Not too bad. First one was the I replaced two weeks ago. Second one, just pulled from fuel bowl. Third one, new unused filter. Thoughts?
01-28-2019 01:55 AM
bluenavigator It was less than a week that I had to replace the fuel filter. I did the search and couldn't find the correct part number to replace the fuel sender inside the tank. I am not sure if the sender had gone bad or the slime had messed up the sender until I pull it out of the tank after dropping it.
01-27-2019 04:14 PM
ArcticDriver I would guess atleast 3 filters but it depends on how bad the contamination is.

Another advantage to cleaning out the tank is less chance of the issue returning.

But no harm in waiting to see how long it takes to really foul your first filter.
01-27-2019 11:49 AM
bluenavigator Uh-oh... that many filters? I need to drop the tank soon or later, to fix the fuel meter problem, anyway. It is way off. I think that it is the fuel gauge inside the tank being bad, sending wrong measurement. Possible that it is the slime that caused the problem?
01-27-2019 09:37 AM
Kimber1911 And be sure you drain the fuel bowl before pulling the old filter!
01-27-2019 01:15 AM
Originally Posted by 79jasper View Post
Yep. But now you better grab like 10 extra filters.

Sent from my SM-N960U using Tapatalk
I was just going to say something similar since he is not dropping the tank.
01-27-2019 12:48 AM
79jasper Yep. But now you better grab like 10 extra filters.

Sent from my SM-N960U using Tapatalk
01-26-2019 11:12 PM
bluenavigator After putting new clean fuel, I decided to replace the fuel filter. I didn't check its condition until I went to the gas station. I noticed the engine stumbling again, similar to last Thursday. So I decided to check fuel filter and found it seem to be full of same brown stuff. I didn't know what it was until Bugman mentioned it. Hopefully, that it will no longer being a problem. I put Power Service Biocide in the fuel during the fill up. Surprised me that it doesn't take that much to put in the tank since it is only 19 gallon in front. I think that I put 2 oz. More than enough for sure.
01-26-2019 10:32 AM
bugman Sounds like algae. They make a biocide to run in the tanks to take care of it.

01-26-2019 10:24 AM
bluenavigator After drain the front tank, I noticed that there is strange brown stuff inside the clear hose and i am able to get some of it. It is some kind of sticky glum? Sort of like slime...yea, that's what it look/feel like. Wonder if anyone would know what it is?

Seem that there was about 3 gallon left in the front. Now I am working on the rear tank, seem that there is some fuel left, too.
01-25-2019 10:46 PM
bluenavigator Ran into trouble yesterday. It felt like it ran out of fuel. I tried to switched to rear tank and still in trouble. I am not sure if I do have any fuel left in the rear tank. I checked the fuel bowl to see if it is out of fuel. It seem to be out of fuel because there is only little fuel left in the bowl. So I put fresh diesel in the bowl and able to get my truck back home. I decided to see if there is any fuel in the front tank. Sure, enough that there is more than a gallon in there as I am draining the tank. Maybe it is the bad fuel that causes the trouble. Much worse shaking than before during the normal driving. Will let y'all know more after this.
01-24-2019 11:35 PM
ArcticDriver This article describes Galvanic Corrosion better than me but the key is to stop one of the three requirements, specifically the moisture. i.e.conductive liquid.

This is why it is recommended by many to apply dielectric grease when using an electrical component from early and late model years. The early ones were tin plate IIRC...and this was true for ICP as well as CPS and possibly all electrical sensors of that era.

The dielectric grease keeps the surfaces dry. Since this is the case, you don’t need to glob the entire surface area...just the rubber washer (gasket) which may be a purple rubber.

I don’t know how often the CPS pigtail is found to have moisture because I use dielectric on the rubber gasket since it makes pulling apart easier when my arm is contorted in that narrow space.

01-24-2019 11:33 PM
79jasper I ran whatever riffraff sells as a motorcraft CPS in my 94.
For the contact material, I was fairly certain that was the icp sensor. Never heard of it with the CPS. But again, wont make any difference. With the CPS most just recommended the color of sensor. .

Sent from my SM-N960U using Tapatalk
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