So I just finished changing my oil and......
#1
So I just finished changing my oil and......
cleaning my air filter. After I finish I usually let it sit and idle for about 10 minutes while I clean up. As I was cleaning I noticed this strange noise coming from my engine. I get closer and it was something I had never heard before coming from my engine so I knew something wasnt right. It sounded just like a hose from an air compressor. I was listening to that for about 10 minutes puzzled on what it was when all of a sudden the idle on my truck begins really roughly then all of a sudden it turns off. WTF!
I let it sit off for about 5 minutes and I turn it back on. Right off the bat the idle is extremely rough and I could tell it was about to choke again so I turned it off.
Do you guys have any idea what it is? It sounds like it was coming from the middle of the engine bay closest to the firewall.
blehhhhh
I let it sit off for about 5 minutes and I turn it back on. Right off the bat the idle is extremely rough and I could tell it was about to choke again so I turned it off.
Do you guys have any idea what it is? It sounds like it was coming from the middle of the engine bay closest to the firewall.
blehhhhh
#2
#5
lol yes I did. 4.5qrts plus a tad extra..I checked the hose goin into my intake and that was fine.
I turned it on again and revved it a little bit and the idle seemed to get better after a little while..Then I noticed if I was idling and I hit the gas and let off, the rpms stay at about 1.5 then after like 10 seconds it goes down to 1 or slightly less...when I let the gas off its acts like im actually hitting it slightly even though im not
I have been noticing a rough idle for about a month now, I just never let it idle as long as I did so maybe this has been a problem for a while and I just now noticed since I let it idle that long
I turned it on again and revved it a little bit and the idle seemed to get better after a little while..Then I noticed if I was idling and I hit the gas and let off, the rpms stay at about 1.5 then after like 10 seconds it goes down to 1 or slightly less...when I let the gas off its acts like im actually hitting it slightly even though im not
I have been noticing a rough idle for about a month now, I just never let it idle as long as I did so maybe this has been a problem for a while and I just now noticed since I let it idle that long
#8
#9
The symptom is the sound of rushing air. That EXCLUDES any wire connector problems or dirty sensors.
Check your entire intake system for loose connections. If the intake hose wiggles at all on the throttle body or MAF, tighten the clamps. Check all of the VACUUM hoses that connect to the intake manifold.
One of these has to be loose, and it's allowing excess unmetered air into the engine, causing it to "choke" out.
Check your entire intake system for loose connections. If the intake hose wiggles at all on the throttle body or MAF, tighten the clamps. Check all of the VACUUM hoses that connect to the intake manifold.
One of these has to be loose, and it's allowing excess unmetered air into the engine, causing it to "choke" out.
#10
#11
Originally Posted by Needforspeed3685
The symptom is the sound of rushing air. That EXCLUDES any wire connector problems or dirty sensors.
Check your entire intake system for loose connections. If the intake hose wiggles at all on the throttle body or MAF, tighten the clamps. Check all of the VACUUM hoses that connect to the intake manifold.
One of these has to be loose, and it's allowing excess unmetered air into the engine, causing it to "choke" out.
Check your entire intake system for loose connections. If the intake hose wiggles at all on the throttle body or MAF, tighten the clamps. Check all of the VACUUM hoses that connect to the intake manifold.
One of these has to be loose, and it's allowing excess unmetered air into the engine, causing it to "choke" out.
I just got back from the gym and it drove fine. I think as long as I dont idle for a long period of time im ok for now. Im calling ford tomorrow for my recall and im just going to tell them to check that out when I take it in hopefully this weekend.
#14
Take a piece of rubber hose about 2' long and put one end to your ear and move the other end around the engine compartment (with the engine running) until you locate the loose/cracked/broken vacuum hose/fitting and then replace it. It might be a good time to go ahead and inspect all of your vacuum hoses and fittings cause they tend to get dry and crack, especially if you frequently wash the engine bay.
#15
#16
ok well I found the problem..its on top of the engine bay middle like I said..its a little rubber tube about 6 inches (90 degree bend) and had some oil in it...I dont know if thats a bad thing. Has two hoses connecting to it which I think is just water. Its all cracked in multiple spots. I cant get a replacement part for it until fords open next and thats not til tuesday.
anyway here is a pic to get a better idea of where it is.
anyway here is a pic to get a better idea of where it is.
#17
#20
Originally Posted by rondog
that still doesnt explain the sound...you know what an air compressor sounds like when you blow air out...thats the same exact sound its making.
That sounds like you have a vacuum leak on the engine somewhere. that would have to do with your intake. Check all your intake manifold gaskets, then check all your vacuum hoses, then check to make sure that you have a seal on the airbox, and that the air hose is sealed shut too.
#21
#23
#24
#25
It's not a sensor guys. It's the PCV valve (Positive Crankcase Ventilation). It's a simple device that allows vapors from the crankcase to flow into the intake and be burnt up in the combustion chamber.
I believe your particular application uses a water hose that wraps around it to warm up the PCV valve. This is visible in the image above. Don't be alarmed when you remove the PCV valve by a U-shaped metal hose that surrounds the rubber grommet. Make sure you put the new one in the same way the old was removed.
The PCV valve is available at any auto parts store for a few bucks. It looks like this:
Due to the large size of this valve and the hose connecting it, any loose fittings will cause a rough idle condition and poor low-end performance. Replace the PCV valve by simply pulling it out of the rubber grommet and disconnecting the rubber vacuum hose from the intake manifold.
I believe your particular application uses a water hose that wraps around it to warm up the PCV valve. This is visible in the image above. Don't be alarmed when you remove the PCV valve by a U-shaped metal hose that surrounds the rubber grommet. Make sure you put the new one in the same way the old was removed.
The PCV valve is available at any auto parts store for a few bucks. It looks like this:
Due to the large size of this valve and the hose connecting it, any loose fittings will cause a rough idle condition and poor low-end performance. Replace the PCV valve by simply pulling it out of the rubber grommet and disconnecting the rubber vacuum hose from the intake manifold.