I could use some HELP here guys..

I talked to a Ford Tech today thats a friend of mine, and he said he almost guarantees that its the Cam Phasers and said that many of them do it and to run a thicker weight of oil such as 5w30. He said its a big job to replace them, and most of the time the noise will come back later down the road. Now that I do think about it, I started using Motorcraft 5w20 synthblend oil. Maybe that has something to do with it. The engine calls for 5w20, so I dunno. Anyone heard of this?

Your car doesn't have cam phasers. These are a part of the variable valve-timing feature found on the 3V 4.6L engine. The 2V has "fixed" cam timing.

He may have been referring to the timing chain tensioners though. However, you said that you heard the sound coming from the "Passenger side rear part of the engine" which probably rules out the timing chain hardware since that's all located under the front cover of the engine.

You said the sound started after you moved from MO to TX. As well, the car's only got 25K miles on it: Problems from the timing chains or tensioner hardware on such a youthful engine would be the last thing I'd suspect.

I still think it sounds like detonation. Have you tried running a can of NOS octane booster through it to see if the noise goes away? Again, did you check the torque on the spark plugs yet?

(BTW, the reason I keep mentioning NOS is because it's one of the few that I've tried that actually worked, at least for me. It got rid of a nasty throttle tip-in burst-knock resulting from very aggressive timing in my N/A tune/combo before the blower.)
 
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i would check the MAP sensor. since you moved from MO to TX, i dont know whats the elevation or difference (sea level), but sometimes, when u change, and the map sensor is bad, its not gonna automatically adjust to the new elevation ambient pressure and its gonna give you engine knocking.
 
i would check the MAP sensor. since you moved from MO to TX, i dont know whats the elevation or difference (sea level), but sometimes, when u change, and the map sensor is bad, its not gonna automatically adjust to the new elevation ambient pressure and its gonna give you engine knocking.

There are no MAP sensors on our cars. Our ECUs use mass air to meter air and fuel.
 
Well i put my 2 cents in here, get a pc of garden hose about 2 1/2 ft long, put one end next to you ear and the other next to the engine, move it around to see if you can find the exact location of the noise.... if it is coming from the inside of the motor i would take it to the dealer right away... hast could make waist on this one...
You know i see more problems with these mustangs than is normal for a car, usually on these Fourms you have people Modding their vehicle's. on here it seems everybody has some problem with their FORD... I have a supercharged 07 C6 corvette pushing 653 RWHP, and i had a issue with it,took it to the local chevy dealer they checked it out found that there was a faulty cam sensor and replaced it free of charge, the car doesn't even have 15000 miles on it and it already had a issue. I guess that may be the reason the American Auto Manufactures are in the trouble they are in... people dont respect the big 3 anymore, when they can go with a Honda,Toyota, or German and drive them with little to no problems at all... I am a loyal GM guy but Dammmmm... Lets get it together and make something that last more than a few years with no issues or many recalls... just my thoughts..

Larry :flag:

LOL literally. You have a 653hp supercharged C6 vette and your bitching because something broke? Do you realize how that sounds? They fixed it for FREE! You should be happy as hell, most companies would send you home with your tail between your legs for coming in to their dealership with a heavily modded car asking them to fix it, much less for free!

Lets see, my FORD mustang has 109k miles on it, is supercharged and the biggest problem ive ever had with my motor was a bad IAC, and that was at 95k miles!

ANYTIME you mod a vehicle your taking the risk of running into problems. The car was designed the way it was to run the way it does stock, you add aftermarket parts, you take a risk of something breaking...thats common sense, at-least i thought!
 
You never did say if you have checked the pulleys or not..... Sounds are hard to find in the engine bay. If the pulleys are good then it is possible that you have a bad bearing and are getting motor knock. But it shouldn't go away and should get worse as you beat on it.

Yup, bad bearings would squeal at light throttle, but I would imagine that at high rpms theres more oil getting to them or the squeal is to high to hear so it goes away:shrug::shrug:, :nice:I think your right, somthing also tells me cars need to be started ever now again or they can also develop problems without use!!:ban:
 
Its official, I got some pop-corn poppin' yall. Its hotter than a sumbitch today, and of course I had the A/C on. I was in 5th accerating at 55mph and it has now started constantly pinging. It does it in pretty much all the other gears also now. Its no question that I have pre-ignition now-the question is whats causing it. I have absolutely no tools down here with me so i cant check the plugs. Im going to have to save and take it to a dealer. BTW I have been getting gas at mobil1 the last couple tanks figuring it would clear it up. I ran quick-trip 87 in it before when this all started. byup this sucks ass. :bs:
 
Well i put my 2 cents in here, get a pc of garden hose about 2 1/2 ft long, put one end next to you ear and the other next to the engine, move it around to see if you can find the exact location of the noise.... if it is coming from the inside of the motor i would take it to the dealer right away... hast could make waist on this one...
You know i see more problems with these mustangs than is normal for a car, usually on these Fourms you have people Modding their vehicle's. on here it seems everybody has some problem with their FORD... I have a supercharged 07 C6 corvette pushing 653 RWHP, and i had a issue with it,took it to the local chevy dealer they checked it out found that there was a faulty cam sensor and replaced it free of charge, the car doesn't even have 15000 miles on it and it already had a issue. I guess that may be the reason the American Auto Manufactures are in the trouble they are in... people dont respect the big 3 anymore, when they can go with a Honda,Toyota, or German and drive them with little to no problems at all... I am a loyal GM guy but Dammmmm... Lets get it together and make something that last more than a few years with no issues or many recalls... just my thoughts..QUOTE
Another dumb mfr that thinks *** and european cars don't have problems. As far as ford goes, consumer reports said that ford's quality is now on par with toyota, honda, etc. When one of the big 3 has a recall it's a front page story and when toyota or honda has one it's a little article on the inside. A least that's how it is where I live. The mustang is easily the most popular sports car in this country.(i think) A big part of these forums is to have people help you diagnose your car. The reason ford got into bad shape is because they put all there eggs into the truck and suv basket and when gas shot up everybody stopped buying their stuff. Now the new ceo has the company on the right track by making great fuel efficient cars. The new fusion hybrid tests way better then a 100,000 lexus hybrid for a fraction of the cost. Why don't you stick to honda forums so you can discuss what neon light goes best with pink and how to frost your hair at home. douche
 
It sounds like you had what's called "Tip In " detonation. man, that sounds nasty.

But I digress. This can happen when you stab the throttle the spark curve advances before extra fuel is delivered. Your car is probably running pretty lean for some reason. The 93 octane is now probably just masking the problem since it's still stock with the stock ECU tune in it. With the stock tune you should be able to run 87 in it without this happening. You could have some carbon buildup on the pistons that's bumping the compression slightly. Do a Sea Faom treatment through the intake instead of the fuel tank and it should help.