If you have the factory fuel filter housing: Are there any tiny black particles in the filter or bottom of the housing?

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Yes, I have the factory fuel filter housing. I have recently had the fuel filter housing out twice and did not notice any black particles, but then again, I wasn't looking and could have easily missed or overlooked that. So, what can you tell me about the black particles?

 

Sometime in 96-97 there was a change in the o-ring material. One o-ring especially would bake from heat until it hardened. Then it would begin shedding particles. Black particles would collect in the filter housing. They were noticeable individually trapped in the filter. Eventually they would stick together & build up in the housing bottom as a sticky soup like mess.
Many thought the fuel tank lining, lines or filler neck boots was the mystery particle source.

Ford revised one o-ring to prevent cross leaks and o-ring degeneration.

G.M.'s attempt to turn gasoline designed engines into diesels developed one really interesting problem. Fuel leaking into the oil pan. No easy way to put out a crank case fire.

Blue smoke at start up is from some oil consumption. Does it stop when the engine's warm? How about warm restarts? Did it just start putting out cold start blue smoke after o-rings were replaced?

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Has rebuilt stage 1 injectors from Rosewood. The AD's I replaced were so bad it's hard to say if I had any blue smoke hidden in the clouds or not. I now notice zero blue smoke when starting warm.

I get a 1211 code when the hpop reaches 2465 psi. I have ruled out the adrenaline HPOP, injectors, external leaks, etc. When I pulled the AD's to replace them with the rebuilt stage 1's, I noticed a burnt o-ring in the number 5 injector. I don't remember which o-ring. I still need to pull that #5 injector again and see if an o-ring is bad Indicating a problem with the head or possibly injector cup.

 

The warm start no blue smoke is good, & sounds normal. These models do smoke blue when cold with normal wear. Piston rings were redesigned in the 99 up 7.3's possibly to reduce the cold start smoke. Other blue smoke sources: the o-ring under the fuel pump, turbo, and normal valve guide wear. The burnt o-ring could likely be from hot combustion gases. Cup could cause it as CSIPSD said.


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