Ford - Aviator :: 2003 - Noticeable Hissing Sound From Rear Of Engine Near PCV And EGR
Aug 27, 2015
I have the '03 Lincoln Aviator 4.6 DOHC. It has a noticeable knock/ping/chatter and somewhat sluggish acceleration. I notice the pcv hose was collapsed and shredded. I replaced the hose and valve, didn't change idle or acceleration and I still hear the hissing noise in the same region. I unplugged the egr valve and started the truck, the idle was the same as before I unplugged the valve. could a bad egr valve give a vacuum leak that is hard to detect? I tried testing for leaks by squirting starter fluid near the suspect areas, and I couldn't detect anything. Could a bad pcv valve be caused by a bad egr valve and/or vise versa?
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I have the '03 Lincoln Aviator 4.6 DOHC. It has a noticeable knock/ping/chatter and somewhat sluggish acceleration. I notice the PCV hose was collapsed and shredded. I replaced the hose and valve, didn't change idle or acceleration and I still hear the hissing noise in the same region. I unplugged the EGR valve and started the truck, the idle was the same as before I unplugged the valve. could a bad EGR valve give a vacuum leak that is hard to detect? I tried testing for leaks by squirting starter fluid near the suspect areas, and I couldn't detect anything.
could a bad PCV valve be caused by a bad EGR valve and/or vise versa?
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My car has been making a hissing sound when I turn it off for the past few weeks, I checked the hoses around the intake manifold and they all look to be attached fine.
I took a video and discovered a flex in the rear of my manifold..is this normal? What would be the common issue?
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I noticed tonight my 4.6 V-8 Aviator is acting a bit sluggish, not bad, but still noticeable. I'm pretty sure I heard a hissing noise, almost like a vacuum leak. Would that vacuum leak caused by the pcv valve cause sub-par acceleration? I'm going to check the pcv valve in the morning. is there more than one pcv valve.hose on these 4.6 V-8's? I'm asking because I was reading about the pcv hose/valve in these 4.6 V-8's, some people on this forum had vacuum leaks caused by the pcv valve failing, being that it connects to the intake manifold.
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95 crown vic, 4.6, auto. press the throttle an theres a hissing sound ,let off throttle sound goes away. Air tube to converter ?
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I've got some trouble with my 2010 T&C Touring and the A/C system. I believe it is specific to the rear, but not 100% sure yet.
Here's the symptom, while driving home a few nights ago, I noticed a hissing sound from somewhere under the dash. Research led me to believe that the r-134a was low, so I bought a few cans and charged it up. I drove around yesterday with the fresh refill, and all was well. This morning, I noticed that I hadn't been running the rear A/C, and thus, not doing a full test.
So, I turned on the rear A/C and within just a few minutes, started hearing the hissing sound again. Flash back to a couple of weekends, I replaced brakes/rotors and while inspecting after taking a test drive noticed some water pooling up under the rear passenger side tire. I checked it out, but at the time, it didn't seem significant until today when I started to put this all together.
SO, my question is, what would be leaking right above the tire? Is this something that is super common and I could somehow convince my local dealer to repair out of "good will" like was happening with the '06 model year with a similar issue? I've had to do brakes, rotors and as a result of not knowing that Chrysler calipers can't be pressed in, but instead must be wound in, replaced calipers, and also an EGR valve all at the same time. So, needless to say, I'm not excited about doing further repair.
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Noticed hissing sound coming from the rear windows when the AC is on... It's very annoying so I always crank up the volume of the music. Funny thing is when you open one of the rear windows slightly and the sound is gone. I thought it was from the roof rack but it's not.......coz the sound is there when the car isn't moving too.....as long as the AC is on.....and the rear windows are closed tight.....
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So I ended up removing my rear seats of my 2010 hatchback gs, but there is now a hissing sound coming from the rear where the seats were. The sound starts as soon as I start the car up until I shut the car off. I'm assuming that this noise has always been there just noticeable because of the seat removal. Is this just the fuel pump?
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I have a 2003 F350 with a 6.0. I just finished replacing my HPOP (Adrenaline Pump from Diesel Site) and fired the truck up and its making a hissing sound from the rear of the motor back by the turbo almost sounds like a tire leaking and its loud enough to hear over the engine. The truck is running and idling good but it doesn't seem to be quite 100% when I step on it.
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My Explorer overheated yesterday. Found a very loud hissing sound coming out from under the hood. Let it cool off filled it with antifreeze, started it up, started hissing again. Found the thermostat had broken. Replaced the thermostat. Filled it up again. After replacing the thermostat I found out the hissing sound was coming from the plastic thermostat housing. Replaced the housing. Again I refilled it with antifreeze.
Started to let it warm up and noticed liquid dripping out of the exhaust pipe. Checked it out. Had a green color to it. Then I noticed the coolant resivor was full up to the cap. I did not fill it up past the full line on the side of the resistor. Tried removing the cap.
Found out it had a ton of pressure under it. Bled off the pressure. Refilled it again. Did not put the cap back on. Tried starting it. Instantaneous geyser. Runs like it is missing on 1cylinder. No oil in the coolant that I can see. No coolant in the oil. Could this problem be caused by a blown head gasket of a crack in 1 of the heads or in the block?
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I have a 2014 Superduty with 41000 km on it. I was driving in a remote area yesterday about 53 km from pavement. I stopped for a break and had a very noticeable knocking sound that was more noticeable on the drivers side towards the back of the engine. I had no choice but to keep driving it. the truck ran perfectly fine for the 4 hour trip home(1 hour on gravel and 3 hours on highway) when I stopped a couple of times after that there was definitely no knocking sound an it is not there today, what this could have been? like I said the knocking was so noticeable that you couldn't miss it...
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My 2001 4.6L F-150 has been sitting on the driveway, used once every 2 weeks or so for the last 3 yrs. I came to start it a few days ago and it kept turning over but not starting. The key security chip is working, battery is charged, all plugs are firing, fuel pump fuse and relay check good. When I turn the key to ON, sometimes I hear the fuel pump priming, other times it doesn't. The times it does prime, the truck fires right up.
The times it doesn't prime, engine won't start. When the pump does prime, and while the engine is running, the pump makes a noticeable buzzing sound, much louder than normal. When the pump primes. fuel pressure measures at 42psi in the ON position, 36psi with engine running, and 46psi with engine running and vacuum hose removed. I believe all these are within specs.
My question is this: Is it safe to assume that the pump is going bad and will eventually fail completely? My second question is (and I know this can be debated til the end of time) should I get the Motorcraft or aftermarket? I have Airtex, Spectra, Carter, and Delphi available locally.
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I just noticed today while driving to lunch today that at lower speed and tons I can here an intermittent hissing sound. But as I speed up and build boost it goes away. Not sure what could be causing this sound. it sounds like it could be some sort of pressure leak or exhaust leak I have no clue...
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Well I've just noticed something quite annoying today... a very slight hissing sound coming from under the rear end of the car. A friend I drove to work this morning even said "what's that noise?".... It reminds me of the sound you'll hear when there is a pinhole in a joint weld, or a clamp is loose? My car only has 2800km on it!
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I just bought a 99 f150. Its in great shape only 65000 on it but there is a hissing swooshing sound when turning the wheel... not really any brake sounds. The truck has been maintained and I dont see any leeks in the ps system hoses. I didn't know anything about the atf fluid in the truck... and I haven't added either ps or atf fluid to it. I'm wondering if that is maybe something the dealer i bought it from did. or maybe one of the shops the previous owner did. Would ps fluid cause these kinds of sounds? Do I need a flush of the system.. How to do that.
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I changed my fuel filters a couple weeks ago. When I opened the hood the other day i noticed a kinda hissing or sucking sound coming from the engine mounted fuel filter. I've watched epics video a couple time and think his made the same sound but not sure. I am just paranoid with all the hpfp problems. It runs fine and had no long starts or hesitation at all. Lemme know if you all have the same thing. I just can't remember if it sounded like that before. I have done the air purge properly and several times since changing the filters. I notice the sound while doing the air purge procedure with engine off and key on.
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I have a 2000 F250 4x4, it has been sitting in my garage for about 3 weeks. I cranked it up and backed it up about 10'. A few hours later I noticed a lot of transmission fluid on the floor. I remember hearing a hissing sound when I cut it off but didn't think anything about it. The fluid is on passengers side of truck, right side of the engine. Most of fluid is toward the rear but some ran down in front of the axle also. It's up high also, I've got fluid on rear of valve cover. I've cranked it up and let it run but can't get it to leak. Where did all this fluid come from?
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I have a 98 F150 Supercab 4x4 with 4.6 and an auto trans. I have 107,000 miles on the truck. Recently developed a engine "tick". Upon start up the "tick" is very noticeable. Seems to go away after its been driven a few miles and everything comes up to operating temp. I have checked the exhaust manifolds, all studs and nuts are still there. There are no noticeable holes that I could feel in the manifolds. Read some other posts here that have the "tick under load". Mine goes away once everything warms up. What to look at or for?
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I ran over a chunk of ice at about 15mph. I could definitely hear it scraping the undercarriage. Now, when the engine is on (regardless of RPM), there's a hissing sound (like air escaping, or a belt sliding against something) coming from the back right side of the undercarriage. What I damaged? No smoke, no leaks... just the hissing sound.
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Was driving back home and the check engine light came on, these are the codes I got:
P0345: Camshaft Position Sensor "A" Circuit (Bank 2)
P0365: Camshaft Position Sensor "B" Circuit (Bank 1)
P0390: Camshaft Position Sensor "B" Circuit
The car drove fine, didn't feel any power loss, I heard a very very low hissing sound but I honestly don't even know if it was always there or not... I did put some gas from a different station for once, so I doubt the fuel caused this?
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I have a chirping/ squeaking sound in the engine extremely noticeable on idle. It's not the actual belt because it continues the noise much after the car is heated up. Have no clue what it is, I have 145000 miles. Also when running the engine hard notice a hissing sound sort of like turbo at high rpms especially with ac on high.
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