Water in Fuel (nothing comes out) & Wrench Symbol
#16
I had the same problem. Take a look at my thread. This cleared it up.
https://www.ford-trucks.com/forums/1...n-my-hfcm.html
Messy, but very inexpensive.
Tim
https://www.ford-trucks.com/forums/1...n-my-hfcm.html
Messy, but very inexpensive.
Tim
#17
I had the same problem. Take a look at my thread. This cleared it up.
https://www.ford-trucks.com/forums/1...n-my-hfcm.html
Messy, but very inexpensive.
Tim
https://www.ford-trucks.com/forums/1...n-my-hfcm.html
Messy, but very inexpensive.
Tim
The filters have been changed at 10K since new - the HFCM has not been drained as recommended. The dealer said they cleaned out the HFCM last week - it's back at the dealer now and I should know more Monday afternoon. I will let ya'll know what I find out.
#18
Back from the dealer for the second time. They found more gunk in the water separator. Cleaned it out, codes all cleared and it seems to be running fine now. They said it was not in limp mode when it wouldn't get out of it's own way - they said not enough fuel was getting through the separator - basically fuel starvation.
Tomorrow I am hooking up my 10,000+ lbs boat and pulling it a little over 100 miles, we will see if the problem is really taken care of.
Tomorrow I am hooking up my 10,000+ lbs boat and pulling it a little over 100 miles, we will see if the problem is really taken care of.
#19
#20
#22
#23
The important thing is to determine what the gunk is/was. There are two very different issues I'm aware of:
1. Parafin separation - This seems to show as waxy globs forming in the water sump of the HFCM. They will clog the drain valve and if bad enough can block the WIF sensor so you don't get an alarm if you do get water buildup. The fix for this is to open and clean the HFCM if you find the drain isn't flowing at a normal rate.
2. Bacterial growth - This shows as slimy gunk on the outside of the HFCM filter and can restrict fuel flow. The fix for this is to "shock" the fuel tank with a good dose of diesel biocide such as Power Service Bio-Kleen (small bottle of expensive toxic stuff). If you have this issue you will need to check and service your HFCM filter on a short cycle until the dead bacteria gunk is gone.
The key thing here is that issue 1 just happens sometimes and you can't do much of anything to prevent it, while issue 2 once it occurs is likely to continue to occur until you kill off the supply of bacteria in the tank.
1. Parafin separation - This seems to show as waxy globs forming in the water sump of the HFCM. They will clog the drain valve and if bad enough can block the WIF sensor so you don't get an alarm if you do get water buildup. The fix for this is to open and clean the HFCM if you find the drain isn't flowing at a normal rate.
2. Bacterial growth - This shows as slimy gunk on the outside of the HFCM filter and can restrict fuel flow. The fix for this is to "shock" the fuel tank with a good dose of diesel biocide such as Power Service Bio-Kleen (small bottle of expensive toxic stuff). If you have this issue you will need to check and service your HFCM filter on a short cycle until the dead bacteria gunk is gone.
The key thing here is that issue 1 just happens sometimes and you can't do much of anything to prevent it, while issue 2 once it occurs is likely to continue to occur until you kill off the supply of bacteria in the tank.
#25
#26
#27
It would seem the parafin precipitation may be related to water in the fuel since it seems to only occur in the water sump. I rarely see any water when I drain my separator, perhaps a few pinhead sized drops which may explain why I also don't see much parafin precipitation.
Possibly those with heavily clogged sumps are in areas where for whatever reason they see more water in fuel / tank condensation or something.
#28
#29
Had my truck in the shop no less than 10 times in a years time for water sep/wrench indicator/limp mode issues only to eventually find out I had a malformed fuel tank that was letting rain water in around the top...$1200 replacement. Funny that it wasn't found until I was out of warranty
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Diesel Daddy
1994.5 - 1997 7.3L Power Stroke Diesel
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08-13-2006 10:06 PM