Sucking sound indicitive of plenum issues?
#21
I had this same problem for a while, and some times it would even whine as if the belt were slipping. I found, by looking through a parts catalog, that I was missing a felt gasket that goes between the air cleaner box and the throttle body. Also, make sure to check that the ring/brace that holds the air box to the TB is on tight and lined up correctly. It solved the issue for me. Hope it works for you too!
#22
I had a sucking sound before I replaced (or should I say added) the little o-ring on the TB from the airbox and replaced the belt.
I think my belt was slipping a little and the TB was sucking in air it wasn't supposed to. No whistling noise now.
The only sucking noise I get now is when I have the intake tube off the airbox. That is the good sound.
I think my belt was slipping a little and the TB was sucking in air it wasn't supposed to. No whistling noise now.
The only sucking noise I get now is when I have the intake tube off the airbox. That is the good sound.
#24
#25
I had a similar sucking noise under the hood of my 99 1500 after some work, turned out to be the purge solenoid diaphram had rotted thru. It is on the passenger side fender near the rad support.
Noise got worse under load, fuel mileage poor, power low. Swapped one from a 90's Caravan I had laying around, same pt # on it. All good now.
sprntpshr
Noise got worse under load, fuel mileage poor, power low. Swapped one from a 90's Caravan I had laying around, same pt # on it. All good now.
sprntpshr
Last edited by jondakotaguy; 10-07-2011 at 09:33 AM.
#26
Sorry dont mean to thread jack; just was throwing it out as an idea.. but yeah; I hope not; I've already got enough $$ in this' its full; what about tyranny fluid you know the older pumps on Ford we always used tranny fluid; I wonder what in the hell and how it would make a sound like a vacuum leak I know its coming from there cus i can wave my hand and if my hand is infront it blocks the sound.. and remove i can hear again.. I dont seem to have any other problems; when i increase RPM the sound seems to go away pretty much.. steering is ok.. could the cooler thats attached to the block there right besides be glogged or anything? Can i run some cleaner through it like Mystry oil with out damaging rings or the pump?
#27
#28
Under the dumb question file...Are all the hoses and lines connected back where they are supposed to go? I at times have put hoses and lines back where they were only to discover that it was wrong before I touched it.
One of my other trucks with an open element air cleaner (ie Summit), when you hit the gas the throttle body sounds like a massive vacc truck hose...no problems with it just the way it is.
sprntpshr
Last edited by sprntpshr; 10-07-2011 at 06:48 PM. Reason: spelling and typin'
#30