engine tapping ...oh no

[Ldub]

That silverish box with the blue cap...sounds like you're describing one of the ports in the A/C system.

[IndianaVX]

Ldub,
well, now that its light, i can describe better.
there is a EVAP cap just below this box im describing, but it doesnt connect to the box im describing. just above this cap is a silver bracket that mounts to this box thats making all this noise. in the silver bracket is 1 inch cylinder that also has a orange plug behind it. then immediatly behind this plug, moving towards the middle of the engine is this black box, maybe 2 inches square, and its tap tap tapping loudly.
Just changed my oil, and the engine is running smooth, and yeah, i can hear a very small valve tapping, but using the stethescope, i cant really hear the valves when i listen around the covers and other places, but i hear this box tapping everywhere on the engine, just not as loudly. i hope this makes sense.
thanks guys for the looks and help.....im still needing it.

[Ldub]

OK, now ya gone went n done it...ya stumped the guesser !

I see by your gallery that you have photo technology, yer gonna have ta post a pic for me to have even a clue as to what you are talking about.

[IndianaVX]

Ok, got some pictures, with homemade arrows even...... please, excuse how dirty my engine compartment is, been working at a place with a long gravel driveway.....but its warming up, and i promise you, i will have it all nice and clean again
back to the matter at hand.......the noisy black box

this is the general location...drivers side, back, etc





here you can see the black box, right behind the oxidised silver clip. what is this thing??? government tracking device that uses morse code? what ever it is, i am getting alot of tapping noise from it, and has anyone else had this thing do this??
have at it buddys, i dont have a clue. also, it doesnt seem to tap when the engine is cool, or cold, but after the engine warms up, the tapping is constant, and kinda decreases with revs.
thanks guys, i really appreciate it!!!

david

[Ldub]

Near as I can tell...that would be your fuel pressure control valve.
Take a look in the shop manual that Scott recently made available for download & look under "fuel system".

[IndianaVX]

well,
not for sure, but maybe, the sound you hear in my earlier post may be the sound of a timing belt, or tensioner going out. my belt jumped, and now the truck is in the shop.
just an update. any body having some ticking in their engine should maybe investigate. i only have 64000 miles on the vx. belt is said to be replaced at 100000.
just letting you know whats up with an update.
thanks for your help.
still dont know what the black box is though

david

[Y33TREKker]

I was just looking through a '99 VX Electrical Troubleshooting Manual and saw a picture of that general location. Any chance that's the Intake Air Vacuum Switching Valve making all that noise?