Ford F-150 (2004-2008) :: New Exhaust / Sound Under Load And At Cold Start
Jul 1, 2012
So I finally went and put the exhaust I had been wanting on my truck. Pretty simple set-up. I had the factory muffler cut off and a flowmaster 40 series on it previously. I liked the sound under load and at cold start but normal driving I could not tell a difference from a factory muffler. So I had the flowmaster removed. I still have 4 cats so it's not crazy but it is loud. The only time I have cackle is on initial start-up not even at WOT which was a pleasant surprise. I just like the look of a single exhaust but still want some sound. I have been gone awhile as I needed a little break from starting and also being drawn in to arguments.
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Hard to describe sound, but it only happens under load. It happens at any speed, but more predominently at higher speeds. When I lift off the gas it stops. I can keep it going up hill since I'm maintaining speed rather than accelerating over the limit. The other day I heard another F150 beside me making the same noise going up a hill.
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5.0 coyote exhaust leak .. Since the cold weather has arrived i have noticed a new noise. During cold start engine warm up I hear a nice little tick-tick-tick which sounds to me like an exhaust leak. Is this a common problem? I have just over 58,000 miles would this be covered under powertrain or do they have some nice exclusions for exhaust?
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I purchased my 2008 Explorer Ltd about 4 months ago with a 4.6L and 63k miles. I use it for towing a small travel trailer, so I don't put many miles on it. It's got about 66k on it now. According to OASIS, it has had all MFR maintenance performed up to the 60k mark.
In the past two months, it has developed a "sound" on startup. it goes away after about 75 seconds. To me it sounds like a typical exh manifold leak. That "3 cylinder, putt putt putt tractor" sound. There is no apparent affect on performance. It is definitely coming from the area of cyl #1. I have a recording here.
[URL]....
It is the "higher" of the sounds. The lower pulsing/whooshing is just regular engine noise. You can hear the regular engine noise as the camera pans to the back of the car.
What puzzles me is that the exh manifold sound goes away after 75 seconds or so. Holding the tailpipe shut for a bit builds up lots of pressure quickly. Do you think it IS, in fact, an exh manifold leak, and it seals up with thermal expansion as the engine worms up (75 seconds)? Is this a typical issue with the 4.6L
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I just got a brand new 2008 F150 supercrew FX2 last wed. I love it, it's my first truck ever and I'm excited to drive it. I wanted to change the exhaust to something that has a low rumble and is deep, not too loud or anything.
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When my truck sits all day and its cold out, my truck in 2WD will make a whining sound going down the road, sometimes its a grinding sound almost. Appears to be coming from the passenger side of the truck towards the front. Engaging 4x4 gets rid of the noise, and the noise will usually disappear after the truck has been running and warmed up. I've changed my ball joints recently and everything looked good and yes it had done it a time or two before hand. What causes this, and how do I fix it?
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On cold start or when the cars been cool down for a hour or so, a huge cloud of smoke will come out. it smells plastic burn than a rich gas smell.
So far this is what i did, a oil change, add a no smoke oil treatment, replaced with an oem pcv valve (this fix my rx300 smoking issue years ago)
Video 1, Friday at 3pm. the temperature is ~60 degrees, less smoke after a pcv changed
Video 2, Friday after noon at 6p.m. ~50 degrees
Video 3, Next day 10 a.m. ~48 degrees
In person it looks white smoke, but the camera captures it more blue smoke. I have been constantly monitoring my levels and oil and coolants are just normal.
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I have a 2006 f150 lariat 5.4 triton I just purchased a few months back with 80,000 miles on it.
I recently have been hearing a gurgling or even a water sound from under my dash board on cold mornings. Note I don't even use my heat or air conditioner and I drive about two miles to work, park my car and turn it off and for a minute or so I hear gurgling or a sloshing noise. Note some days I don't hear it when it's 60 degrees outa X warm for the day.
Now a week ago I took it to the dealer and they said yes your heater plugs were clogged, they fixed that and I can now still hear the noise....
So I have been searching around and allot of website have been saying that it's my coolant level. Now I just drove to work and here is a pic of my coolant level.
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I have a 2005 STX with 107,000 miles on it. When it is cold you have to turn the key on for 5 seconds twice then start it. When it is warm it will start like it always did. When the temperature outside is 60 or above you have to do the key thing about 5 times. I think it is my fuel pump...
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My 07 F-150 5.4 has a rough idle during a cold start for about 1 minute. It happens mostly when the weather is chilly or cold. Also after the first start it doesn't do it the rest of the day. Of coarse they can't find anything wrong and tell me there are no updates for anything like that.
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5.4. So I have a 2004 F-150 that just passed 80,000 miles and a month ago it started making a very loud noise on startup, but only cold startup, meaning if I haven't used the truck in about three hours. Now I went on youtube to research and found a video of a truck making the exact same noise! Here is the link:
2004 f150 cold start knocking noise - YouTube ....
Need to verify what this is??? Some people are saying cam phasers and some are saying I'll need a brand new engine!
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I have an '05 FX4 with 5.4 and 55,000 miles. I've noticed that once in awhile when starting the truck after it has sat for at least a day I get a type of growling noise that lasts for a second or two. It usually happens shortly after the engine starts up and gets running, but it has also happened after it has run for a minute or two and then makes the noise when I give it some gas to take off. From inside the cab the sound seems like it is coming from the driverside firewall area, but on the rare occasion that I'm able to start the truck and jump out before it makes the sound it sounds like it is coming from underneath the center of the truck. It doesn't make the sound every time on a cold start and never makes it on subsequent starts. I drive truck during the week only drive my Ford on weekends and sometimes it goes longer without being started, but I don't know if this has anything to do with it.
I thought it was a shield vibrating or something but have also heard that the VCT parts can make a rattling sound on a cold start also and this has me a little worried. This sound seems more like a fast growl than a rattle, but it happens so fast it's over before I can really register what it is. One time it made the sound twice, once after startup and again after it had idled a minute or two, thats when it seemed like it came from under the center of the truck. The engine has had a slight cam phaser knock since new, but it is so quiet that it can only be heard if you're inside a building or next to a wall and roll the window down.
Also, I change the oil every 2500-3000miles and only use Motorcraft 5w20 and a 820S filter, and generally baby the truck. What this could be. The truck runs great all the time, I just get this noise occasionally after cold start.
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I put in a cold air intake in my 05 5.4l. Now truck will start up then die, the throttle doesnt seem to open up when i step on the gas. everything was working fine before I started on it.
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The wife's 08 Mountaineer has an exhaust tick when it's cold. Goes away after it warms up. EGR valve sticking or something? Is there an easy fix?
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Yesterday evening I started up my 2008 variant 3.6 4motion after it had been sitting for about 24 hours. It started up right away but immediately started making a clanging racket that sounded just like an old Mercedes Diesel that needs a tuneup. It was such a loud and odd noise that at first I thought it was another car or truck pulled up next to me!
After about 5-10 seconds it settled down and idled normally--no warning lights, no leaks, no performance issues. I took it on a ~7 mile mixed freeway and surface streets drive with A/C off and on and it ran like a champ, then it sat again for a couple of hours before the return trip and started up & got us home with no problem.
It definitely wasn't the normal injector noise and it wasn't the emissions SAI (Secondary Air Injection) pump either. Since it's a 2008 (and since it's still running) I'm ruling out the oil pump bolt. The accessory v-belt and tensioner look fine and engine oil level/pressure are good, too.
We're experiencing our first real hot weather of the summer (low 90s) and it had been baking in the sun all day, so I'm wondering if the temperature caused pinging on startup before the ECU adapted?
Today, of course, it was normal. Have any other 3.6 drivers ever had this happen?
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94 f250 cold start prob will only start when fuel is squirted in to throttle body/air intakes ?
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Problem description: A loud metallic rattling sound from under the car under moderate to heavy engine load, only when engine/exhaust is/are cold. It is noticeable from within the cabin with the windows rolled up and the sunroof closed. Crack a window or the sunroof and it's pretty loud. The first time I heard I, I thought "this is not good".
This is not an octane ping or valve train noise. It sounds like a coffee can with marbles being shaken in concert which what might be the rapping of a V8 engine's exhaust. I had a Sunbeam Tiger that rapped in the upper rpm ranges and this reminded me of that but instead of rapping, it shakes a can with marbles.
There has been much discussion and speculation as to what causes this. It does seem to occur only with late - 04 and up V8 Touaregs with the "sport" exhaust that replaced the "std"(?) exhaust used on the majority of the 04s.
Observation: I looked very closely at the heat shields, looking for ways they could rattle. On the passenger side (LHD), the heat shield has three main sections:
- Front: around/near the secondary cat (tightly secured)
- Rear: around/near the rear differential (tightly secured)
- Middle: between the two mentioned above (loosely secured)
The three sections overlap a little where they meet. It was very easy to tap on the middle shield and make a loud metallic sound. I put my finger between the two shields (where they meet) to isolate the two metal pieces and tapped again, and the noise was gone.
Theory: The harmonic resonance of the exhaust under load vibrates the middle heat shield and it rattles against the front and/or rear shields. As the shields heat up, they flex enough to provide clearance between each other and the noise goes away. This may be unique to the "sport" exhaust if (and I am only speculating) the heat shields were changed (in design or fitment) when they changed the exhaust.
Experiment: I tried a very simple experiment. I slightly bent the edges of the middle shield (~1/2 inch) where it was coming in contact with the front and rear shields. The allowed me to tap rather hard on any of the shields without them rattling against each other.
Result: I make the tweaks to the shields Sunday night. When I drove to work this morning, I put the transmission in sport mode and ran WOT until it shifted. Normally, I would have heard the sound (very loudly) but it was gone. No metallic sound. Not completely convinced, I repeated the experiment on the way home and, again, the sound was gone.
Summary: It was cool out when I was going to, and from, work (64F) and this would normally be the perfect set up for making the sound. I think that tweaking the heat shield has solved the noise on my Touareg. I am tempted to go back under there and pop-rivet a little brace between the shields so that they cannot rattle against each other again. On the other hand, I may just leave it be and do the pop-rivets if the noise comes back.
Anyway, I was excited to find a potential solution for my Touareg and wanted to share it will you all. I will post back after a while and report how it goes in the long term. Lastly, I really liked being able to put the air suspension in xtra-offroad and get under the car (easily) without using a jack....
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Have a friend and looking at his truck for him. He was towing a boat and climbing a steep grade hill. As he described it, it felt like he lost all power. Did manage to get it to the top of the hill and stopped to check it out.
Noticed the under of the truck dripping oil. Checked the motor oil and none on the stick. Put 4 quarts in the motor, started it back up and oil pressure is good and motor sounds fine.
The strange thing is the motor is dry. Can not find where the oil leaked out. All the oil is located on the transmission and transfer case. I'm not too familiar with these Triton 5.4's but where could that oil possibly have come from? I'll re-look this morning.
Also, with oil in motor, and it is idling, there is no oil leak or drip anywhere. Is there a pressure regulator in this oil system and the load he was exerting cause it to release?
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As the title says I have noticed a strange sound on start up in the last couple weeks that sounds like rocks in a can. Noticed only at start up and then stops but I have noticed it slightly infrequently when driving. Truck runs great, no noticeable problems. I have looked under the hood and suspension to see if something maybe hung up and didn't see anything. Thought this might be the problem since I was following a plumbing truck that had plastic buckets flying out the back and I hit one!
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I have a 2004 f150 lariat crew cab 4x4 with the 5.4 3 valve. It now has 113 000 miles. Since i got it at 85 000 miles its had a hiss when the engine was under load. So like light acceleration or driving into wind. The guy i bought it from said that it had a manifold leak so that's what i figured it was. I got the manifold fixed and it still hisses. There are no check engine lights. It almost feels like my engine lags when it starts hissing. It sounds like its coming from right on the other side of the fire wall. What it could be?
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I have a 2004 150 with 165,000 miles I sometimes pull a 5 by 8 trailer. when pulling trailer in overdrive and excelorating the engone will cough several times. I took it to a mechanic and he told me that there was nothing he could do that I needed a new engine. I can pull trailer out of overdrive with no problem. don't undrstand why I need new engine....
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