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Discussing Loud Engine noise in the Modular Mustangs Forum. When the car hits 12mph is sounds like its going to blow up. Almost sounds ... Modded Mustangs is the premier Ford Mustang Forum on the internet. We discuss all aspects of the Ford Mustang on the forum. Registered Users do not see the above ads. Please Register - It's Free! |
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#1 |
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Newbie
Join Date: Apr 2007
Posts: 22
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Loud Engine noiseAnyone shed some light for me? |
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#2 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
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You sure you haven't spun a rod or main bearing?
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#3 |
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Newbie
Join Date: Apr 2007
Posts: 22
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new forged internals. i doubt anything is broken
this started happening when it was being tuned. may have something to do with that but its weird its on 1 cam and at 12mph |
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#4 |
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Newbie
Join Date: Apr 2007
Posts: 22
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think it may be a oil pressure problem. any ideas?
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#5 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
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Other than the loud noise, is it running smooth? Missing at all? If this happened when it was being tuned, my first gut feeling is the timing is way off. That could cause some fairly loud pinging/knocking.
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#6 |
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Newbie
Join Date: Apr 2007
Posts: 22
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timing is fine and it runs smooth but when it hits 12mph it sounds like its gonna blow
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#7 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
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Does it do anything if you sit there in neutral and rev her up a bit?
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#8 |
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Newbie
Join Date: Apr 2007
Posts: 22
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nope she runs fine at idle and if you rev it. just at 12mph is gets really loud
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#9 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
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See that leads me to believe it's a driveline issue. Something in the tranny, a u joint, or the rear end maybe.
Although it is possible that something is wrong with the engine to whre it's only doing that under load. So it's consistent, and does it every time at 12mph? Does it get worse or go away as you keep accelerating?
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#10 |
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Newbie
Join Date: Apr 2007
Posts: 22
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it goes away as i accelerate or just put it into neutral. Its not consistant because my buddy went for a drive in it and we built boost fine. couldnt hear it so we were driving back to the shop and BAM it happened. Keeps happening
the noise is from the engine. thought it may be the tranny but i checked it |
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#11 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
|
Maybe it will come down to those knock sensors being F'd then.
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#12 |
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Newbie
Join Date: Apr 2007
Posts: 22
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foudn this
Question: 2001 Dodge Grand Caravan mileage: 125,000. I recently took my van to a mechanic because of a annoying noise and a loss of oil pressure. He changed the main bearings and rod bearings. I took it back the same day because it is still losing oil pressure and the noise is still there. The truck is idling about 10 pounds of oil pressure and at running speed it is about 25 pounds. I paid about 1700.00 dollars to have this van worked on but I don’t feel that I got my moneys worth. Answer: Was the oil pump replaced when the work was done? If not, the oil pressure relief valve may be stuck open causing low oil pressure. The engine noise may be in the valve train. |
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#13 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
|
All righty, so how is your oil pressure? Normal? Not fluctuating at all, particularly around the 12mph where you hear the noise?
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#14 |
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Newbie
Join Date: Apr 2007
Posts: 22
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pulled the filter and oil and it has ALOT of metal in it. I thought it had already broken in after the first oil change (30miles) I guess its not or something in there is breaking
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#15 |
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Mods Are People Too!
2007 Mustang GT
282 rwhp/292 rwtq
Join Date: Jan 2007
Location: I've got Rags in my bubble and I don't know what to do with it!
Posts: 15,070
|
Sounds to me like she's spun a bearing dude.
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#16 |
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Newbie
Join Date: Oct 2007
Location: Rhode Island
Posts: 36
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yeah me to +1
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#17 |
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Resident Bubblehead
2000 Mustang GT
Join Date: Nov 2006
Location: Virginia Beach, VA
Posts: 4,525
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does it sound like there's something rolling around inside the block that shouldn't be rolling around? if the answer is yes, then you're probably the owner of a brand new spun rod bearing. i spun a rod bearing about a month and a half ago. when they dropped the oil pan, 3 chunks of what used to be a rod bearing fell out. metal shavings in the oil filter are also not good signs. it's probably time for a rebuild. sorry. i feel your pain, brother...
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