94 F150: Whenever I start my truck and begin to pull off, I can hear what sounds like water running through something under or near the glove box, near the fire wall. I can't figure out what it is for the life of me!

Any thoughts on this?

Thanks.

 

Your heater core is behind the glove box. Why it would make noise?

 

Sounds like the heater hoses are reversed.

 

I had an injector not seated correctly in the rail. My gauge says 30 psi after turning the key to run several times. Is this good enough?

 

specialist Seems you may have gotten some ill advise from your mech. Start with the basics. You have fuel, spark and compression so you should have fire! Check first to see you have not spun a timing chain. Pull #1 plug and the dist cap. Turn motor over until #1 is at top dead center(use a pencil end to be certain) The timing mark should align. Now look to see where your rotor is pointing. It should be at #1
If it is not suspect you have spun a chain. If this is the case you can crank all day the cyls will fill with fuel but because valves are opening and closing at the wrong time you will get no fire. You can also check to see if your rotor is turning before hand by cranking with the cap off. If not turning most likely your chain is broken.
If everything to this point is correct. Rotor is turning, rotor points to #1 when #1 is TDC, Timing marks align. Pull codes. Check the pressure with a gauge (rented,borrowed) You should have around 40 lbs with the key on not running. If below replace the regulator. How many miles on the motor? Do you have A/C Did you last start the truck with the AC on? With higher mileage motors it is common to spin a chain this way. Good Luck

 

I hate to further jumble up this thread, but for the life of me, I can't figure out what difference it makes as to what hose goes to what tube on the heater core. There's nothing about the core that is directional. Both of the tubes attach at the top, all of the fins and tubes are symmetric, why does it matter? The water goes in one side and out the other no matter which one's the inlet or outlet.

 

You may be right on a 1994, as I can not find anything about the water flow in the heater core of a 1994 F series. I have not taken mine out yet in my 1995.

But in other years it made a big difference and we had a Thread about this about a year ago or so. A lot of Ford Trucks have the inlet and outlet one above the other, one goes to the bottom tank and one to the top. If you put water in the top the air in the heater will keep trying to go to the top and you will never get all the air out and it will make a bubbling sound. The other way around it will pass right out.

At one time they used two different size hoses for the in and out so not to get them mixed up.
Here is a 1994 diagram showing the flow.

 

That would certainly make sense, if the inlet was at the bottom and the outlet at the top, but both are at the top on these trucks. Even in that other thread, I never got any reasoning other than "Ford illustrates it this way". My 87 heater core hooks up just like the diagram you posted. Other than just layout of the hoses, I can't see anything that would make a difference in the heater core itself...

 

I have never had the problem and as I said I do not know how the water flows inside the core and do not have one to take apart right now.
I was going a lot on a previous thread, not the one you are talking about but and older one yet. It might have been in the Van forum as they have the one on top of the other.
I just remember that it fixed the problem for the guy that posted the thread.