Ford F-150 (2004-2008) :: Slight Hissing Sound When Lightly Press The Accelerator And Then Stops
Dec 3, 2014
I have a 2004 F150 4.6L... There is a slight hissing sound under the dash on the drivers side when you lightly press the accelerator and then stops. No matter what speed you are going as soon as you apply the accelerator it hisses then stops. There is also the same hissing , only louder when the engine is cut off. It hisses for about 3 seconds. What could be causing this. It has been idling rough since the hissing started. The check engine light is on and showing P0420 and P0430 codes . The cats were replaced with resonators so I believe that is the reason for the codes.
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Have a problem with a stutter when I press the accelerator while going up hill. I even had this problem driving on a flat road but that was a 1 time thing and happens every time I go up hill. Had a coil replaced that came off of an '04 because one of mine went bad which caused it to shake whenever I came to a stop. Wondering if the coil has anything to do with it... 2007 5.4L ....
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I've been noticing over the past couple years that sometimes when I accelerate, there's a slight delay between the time I press my foot down on the pedal and when acceleration actually happens. From reading other threads it would seem that the most common fix is to re-flash the ECU. I bought a DiabloSport Predator tuner along with a CAI a while back to improve performance/gas mileage and I was wondering if there's a way I can use the tuner to re-flash.
If not, do most ford repair shops already carry these? I don't want to buy a flash programmer. Also, if the shop does carry this type of an item, what is the average cost to get it re-flashed?
I own an '04 F150 XLT 5.4l.
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2007 with 85000 miles. This noise appeaser only between 64 to 69 miles/hours, either manually pressing pedal or when crus control is on. A/C on or off. Noise goes away as soon as i let off the gas pedal. the noise is not very load it sounds like, when mechanical fuel pump stars going bad.
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I just bought this truck yesterday. During the test drive and everything it seemed all fine. After all the paperwork and the truck was actually mine. I noticed once it is all warmed up it seems to have a slight knock/tick? and a slight miss to it. I shot a couple videos, one up underneath where it sounds like most of the noise is coming from. Could it be an exhaust leak? Or is it something internal? Like the Cam Phasers, or a rod or something!
Here is a video around the exhaust area.
Here is up underneath the truck.
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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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06 GX470 muffler exhaling white smoke for a while, now the smoke disappeared, however, a new hissing engine noise is evident. The noise increases with the revolutions of the engine and it never stops.
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I have had 2 cars with exactly the same problem. The first was a 1998 Volovo V70XC. And the second is my current 2003 BMW 325Xi - both AWD. When driving say on a freeway at 60 mph and you touch the accelerator to apply power, you get a whining or slight howling sound. As soon as you lift, the sound disappears, but each time you touch the pedal, the sound reappears. It seems to be coming from the driveline toward the mid to rear of the car. As you accelerate to 65-70 or decelerate to 55-50, the phenomenon disappears. What is causing this and how can it be fixed?
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I have a 2005 F150 S Crew and have been maintaining it regularly. I started having a jerking while accelerating lightly or in between shifting then the overdrive light comes on and then flashes trans fault on dash. I took it to the local tranny shop who fixed the problem however about a year later it started doing it again. What the problem could be before I have to spend another bucks?
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92 PA Base, 141,000 mls
Whenever I have to drive for more than 50 - 75 miles or for one hour at a constant speed, the engine causes the car to buck and loose acceleration. When I press the gas pedal down to the floor, the rpm's stay at zero or when I lightly press the gas pedal, it would accelerate but with noticeable hesitation and difficulty. I go from maintaining speeds of 70 miles down to 40 miles. It also feels like no fuel is getting to the engine. This causes me to pull over for a few minutes, shut the engine off, and then its okay to drive for a few more miles.
I replaced the fuel filter and the MAF sensor. When I changed the MAF, I noticed that the bottom portion of the old one where the little wires are, was broken. I really thought that was the issue but when I replaced it, it started doing the same thing. What should I check or replace next?
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I have a 2007 sonata limited with 54000 miles. When I lightly press on the gas pedal I hear a buzz like a relay from the center of the dash. It does not do it all the time. but It is getting very annoying. What could be wrong?
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I just purchased a 2014 Prius C and am having a problem with the Hill Start Assist/Control.
At every single stop, no matter how lightly I press the brake, when I release the brake the car stays in place for two seconds (no gas), and then starts moving.
I am assuming this is the HSC and not a normal function on the car.
If I depress the brake all the way no lights come on, no buzzer sounds, but the above described behavior still happens. I've tried the light stops on up hills, down hills, and flat ground, it all is the same.
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Today my Windstar would not start, it only start if I press on the accelerator if I let go it will die, I'm thinking of gas pump?
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My 2004 excursion left me stranded in Louisiana this weekend and I had to drive a rental back to Austin today. Was running fine and I got up to come home on sat and the turbo would not engage. When I would step on the gas I could hear a loud hissing sound, the more I stepped on the gas the more of that sound I could hear. Truck would not accelerate at all and almost felt like it was going to come apart at 50 mph. The error code I got from auto zone was turbo issue. and it gave me possible reasons. I checked hoses to and from turbo all hooked up and seemed to be in working condition. There seemed to be some black soot along the top and back of the engine. It would idle fine, but trying to drive it was impossible. I left it at a Ford dealership in Lafayette and await the news. I have a powertrain warranty up to 113,000 miles I hope it covers repair.
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I have had this truck for several years. I have only had a few issues. I've heard of engine noise issues but I have never had any until now. My 5.4 is making a knocking sound that just started. It goes away if I tap the accelerator. It has over 200,000 miles on it. I change the oil every 3000-4000 miles. No additives and always conventional 5-20. Is this a serious issue? I've seen people talk about using thicker oil but I'm very hesitant.
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Ford F-150, 1994 : intermittent problem. going down highway, foot on the gas. At times, will press accelerator to go faster but nothing happens, like clog somewhere. Sometimes, with foot still on gas, i will hear a popping sound coming from under the truck, (under the engine?, or drivers seat). Usually 4-5 pops, sometimes none. But after each pop, car accelerates slightly, as if it is a slight clearing, until finally, as if some clog was opened up, the car plunges forward, so i then take my foot off the gas. Sounds like either problem with fuel getting to the engine or a problem with the exhaust.
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I have a 2006 screw with the 5.4 and I get a hissing type noise from the A/C. It cycles every 7 seconds and sounds like it's coming from the far passenger vent area. It sounds like it's recharging itself or something. I've taken it into the dealer and the first time they said it was the vacuum driven system then the second time they said it was the freon recharging itself. Is every 7 seconds a little to often? It seems to get louder the longer I drive. Needless to say after a four hour trip to the beach hearing this hissing every 7 seconds drives me crazy. It will hiss then stop for seven seconds then hiss again.
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When I press slightly on the accelerator just to get the truck moving and than let off the engine stays at the higher RPM typically just over a 1000. This only happens in drive not reverse and everytime I just slightly step on the accelerator. The truck only has 1K miles on it.
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have been lurking the forum for the last several months ever since I bought my 2008 F150. I bought it used from a dealership and have had it at their shop no less than seven times since I bought it in March, all for the same things.
The first thing I noticed shortly after buying the truck was that after the truck warmed up it would idle rough. My chief complaint by far, I took the truck in to be looked at and this is when all the real fun began. Similarly I had intermittent power steering that I asked to have looked at.
I was told the fuel filter was completely clogged. They cleaned it and assured me all was well. They also bled the power steering system because apparently someone had changed the PS pump and not bled the system afterwards. I got into the truck to leave and it was idling no better than when I dropped it off. I complained again and was told that "this is just how this truck idles" and called BS. They offered to have the throttle body cleaned for me the next day to alleviate any remnants of rough idle.
Had the throttle body cleaned the next day and took the truck home. After about an hour or two I was still thoroughly dissatisfied with the idle and called back to complain. I forgot to mention that I bought my truck from a Chevrolet dealer who had just taken it in on trade about three days before I bought it. Because I complained they offered to send the truck to a Ford dealership for further diagnosis.
The Ford dealership found fouled plugs, a cracked intake manifold and the water pump and fan clutch both had excessive play. They said those would create a rocking sensation which could be misinterpreted as a rough idle. Over $2500 the Chevy dealership paid them and I was called to come pick up the truck.
I didn't even make it out of the parking lot because the truck was whining something fierce. I couldn't believe no one QC'd the vehicle and complained again. Next morning I am called and they said that the Ford dealership had put the intake manifold gasket in wrong and it had been corrected and I could come pick up the truck.
I go pick up the truck and note that not only is the idle still not right, but now the truck is making a hissing/squealing noise when the truck hits 1800/1900 RPM's. Its strange because its not really RPM specific as it is specific to the pedal position. Accelerating or decelerating causes it to go away but its there nonetheless. Whats worse is that in highway driving at 65 MPH, the pedal is in just the wrong position and it hisses constantly. This sound never goes away...and once its been heard its impossible to unhear.
I complain again and they send the truck back to the Ford dealership. At this point I'm dealing directly with the Director of Service because mine has become a high priority case. The Service Director drives with me, confirms my problem and takes the truck himself to Ford. He drives with their shop foreman and they too confirm the problem.
A week goes by and Ford tells him its wind noise. This is complete bullarky because it happens whether I'm going 20 or 65. He calls them on it and they keep the truck another couple days. They call back and say the truck has nothing mechanically wrong with it and that they are done. Service Director goes and picks up the truck and takes it to a second Ford dealership.
Three days go by and they call and claim Eureka! We've found the problem! Clogged catalytic converter causing air flow restrictions. They replace two converters and I go to pick up the truck. It runs like garbage. Further the sound is still there. Call Chevy, leave the truck and take their loaner back home. Next morning Ford's Foreman calls and basically tells me that there's nothing else wrong with my truck and that he even reprogrammed the PCM (which is why it runs to bad all the time now I guess) to get rid of the idle problems.
Long story short here's everything thats been done:
- Cleaned a clogged fuel filter
- Replaced fouled plugs
- Replaced the intake manifold and gaskets
- Replaced the fan belt
- Replaced the fan clutch
- Replaced the water pump
- Replaced two catalytic converters
- Cleaned the throttle body
- Bled the PS system
- Reprogrammed the PCM and transmission control module
After all of this I still have a hissing sound when I accelerate (video 1:
It seems the truck runs worse once its warmed up and even worse once the AC is turned on. I'm sure he programmed the PCM wrong and thats what is causing the truck to run rough.
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I replaced rear pads with akebomo and installed centric premium rotors but in the morning I hear a very loud noise (as loud as as a steam locomotive :-) for the first few times I press on the brake, then the sound goes away. After that, no hissing sound all day until next morning.
I used a brake silencer spray on the back of the pads but to no avail. I had the mechanic lube the pins twice but in vain. Noise went away for 3 days and came back.
I was told to go with OEM pads with shim. I was wondering if this the correct solution and where is the best place to get those OEM pads?
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Reprogram remote to unlock all the doors with 1 press? I cant stand hitting the remote twice for all the doors..
I reprogrammed my Jeep to do this but I can figure out how the sequence that works for the Truck....
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