I've got a 1987 F250 I6 300 that I've owned for 25 years but not used for the last five. I'm getting it out of "mothballs" and going to get it back on the road again. I want to try to clean it up some under the hood and am wondering about the following. (1) The blower that runs after the engine is off and blows on the fuel injectors, will it cause problems if I remove it? (2) can someone recommend an aftermarket air filter that will fit better and look better than the original? (3) The intake hose that runs from the top of the valve cover to the air filter box, is there a small filter that can go on the valve cover and in that way omit the hose?

If anyone has experience with any of the above or advice, please let me know. And thanks.

 

Leave it as it is.

 

Just put a quality air filter in the stock box & go with it.

The cooling fan never was a successful idea & got deleted in later years.

There's a lot of little cone filters that fit to the oil cap nipple & do an adequate job of giving you clean filtered air & keep the PCV system working when the hose or filter in the air box goes fubar.

Other sixers here might chime in.

 

I have read that the cooling fan was used to prevent vapor lock. I believe fuel pressure was increased in later years to address the issue instead of using the blower.

 

Be glad your injector cooling blower works
I'd leave it there for as long as it does work
I would also leave the pcv and it's intake filter alone

 

Six reman injectors would be wise

 

Thanks for your replies. I'll remove the injector blower and leave the rest the same. I went through the specifications for the 4.9l for each year from 1987 through 1996. It looks like Ford removed the blower a few years before they upped the fuel pressure, so there may not be a connection between the two. We'll see.

 

That's stupid.

If his work fine there's no reason to roll the dice with some crap a kid in Pakistan put together let alone do all that work.

 

The truck sat five years, did you see that and not to mention they are 40 years old. They do not flow great, period.

Any actual experience with having injectors serviced on an ASNU machine? I do.

 

Many. Because my other cars are Subarus and they're kinda prone to meltdown and the injectors are expensive and if you're gonna clean them you may as well test them.

No, I don't use an ANSU machine, I use a Chinese equivalent because they're cheap and work fine enough. But you probably don't actually care about the machine. All you really need is is measuring cups and a stop watch if you want to bench test injectors (of course the machines make it easier). You name dropped it to be smarmy and sound exclusive to the people who don't do this stuff.

Anyway, when you try and make injectors run on old AF varnished gas they will do one of three things. 1) work fine 2) not work at all 3) work fine until you park the truck for 2mo to rebuild some other component that did not age as gracefully and then not work at all. #3 is the most common IMO.

If they can open at all it's the close cycle, not the open cycle where they'll typically have problems. Running lean because they don't open quite right is what (reman or otherwise) injectors that are bad out of the box do. Rich is your concern with old garbage. Now, obviously there's exceptions to all this but nothing common enough OP has to worry.

I greatly look forward to your inevitable appeal to authority response.

 

Glad you have serviced them too, I have seen the other machines and seem to work well. No direct experience with those.

My luck with old vehicles and injectors is they flow poorly, some drip, or some **** sideways. Worst case is they are just flat seized. I do them to not chase my tail with other issues trying to get a heap back operable. I had to with an old 733i with about 80k miles and had a leaker, only found after pulling and verified rail pressure would drop.

I avoid branded remans as who knows how the labor was performed as you noted, nor do we know how long they have been on the shelf.