Bang/popping/thud sound in front end - Ford Powerstroke Diesel Forum
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Old 08-09-2011, 04:17 PM
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Bang/popping/thud sound in front end

Guys need a little help trying to track down a noise I have. Not real good at describing noises.

I noticed the sound the day after I installed my 4" tb Mbrp exhaust. I drove it the day I installed the exhaust and didn't notice anything.

The next day while turning right onto the freeway on ramp I got on the go pedal pretty hard and I heard what sounded like 2 back fires from the area that the turbo is under the hood. Worried me a little but figured I was hearing things. Picked up my buddy and we headed out for are fishing trip. Had to show off the truck so while on are crappy freeways I got on the go pedal hard again and noticed the sound again. Sounded like a couple back fires under the hood. So I took it easy so we could get to are boat at least before the truck broke down.

On the way home we hit a real bad section of freeway and we heard the sound again. This time I was coasting and my buddy said he could feel and here the sound under his feet.
I have had two other people tell me they feel/ hear it under the passenger side floor board.

If I accelerate hard I will get the bang/popping/thud sound. If I am going over bad road 30mph + and hit the bumps just right I hear the sound.

I have looked all over under my truck and I can't find anything broken or loose. The only thing I know I need to replace is the outer tie rod. The boot is torn and will not hold any grease. Been that way since I bought it. Could a bad ball joint in the tie rod be the cause of the sound?

I don't think it is my exhaust but it seems weird it started happening the day after I installed it.

Does anyone have any ideas? This is bugging the hell out of me.

Thanks guys.

Last edited by cj1026; 08-09-2011 at 04:20 PM.
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Old 08-09-2011, 04:33 PM
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I say your down pipe is hitting the under side of the truck when under hard acceleration. Probably need to loosen the clamp at the turbo and under the truck and try to rotate the pipe.
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Old 08-09-2011, 04:42 PM
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I will check that out in a bit. Would it also hit when driving on bumpy roads?
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Old 08-09-2011, 04:45 PM
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Quote:
Originally Posted by cj1026 View Post
I will check that out in a bit. Would it also hit when driving on bumpy roads?
Very possible. Have someone get under the truck and push the exhaust up and down while you sit inside and listen. I'll almost guarantee you have a clearance issue and will have to rotate the exhaust.
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Old 08-09-2011, 05:01 PM
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dhanna's right about the down pipe. had to tweak on mine to keep it off the firewall. go vote for his truck in the ROTM. just a few votes will get him back on top. vote now, thanks!!
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Old 08-09-2011, 05:43 PM
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Quote:
Originally Posted by dhanna6powerstroke View Post
Very possible. Have someone get under the truck and push the exhaust up and down while you sit inside and listen. I'll almost guarantee you have a clearance issue and will have to rotate the exhaust.
I do believe you are right sir. The down pipe and clamp are resting on the firewall. It's hard to push on, but I did get it to move and it is a very familiar sound. Don't have time tonight to adjust it, but hopefully this week or weekend I'll get in there.
I'll let you know the results after I do adjust it.

Thank you for the help.
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Old 08-09-2011, 05:51 PM
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Originally Posted by cj1026 View Post
I do believe you are right sir. The down pipe and clamp are resting on the firewall. It's hard to push on, but I did get it to move and it is a very familiar sound. Don't have time tonight to adjust it, but hopefully this week or weekend I'll get in there.
I'll let you know the results after I do adjust it.

Thank you for the help.
No problem. Good luck.
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Old 08-22-2011, 07:32 PM
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dhanna just wanted to let you know you were right on the money. I adjusted my down pipe a week and a half ago. Have not heard another bang.

Thank you again for the help.
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Old 08-24-2011, 06:19 PM
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Originally Posted by cj1026 View Post
dhanna just wanted to let you know you were right on the money. I adjusted my down pipe a week and a half ago. Have not heard another bang.

Thank you again for the help.
Good deal
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Old 08-14-2014, 05:22 PM
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Bringing this back.... Mine is doing the same thing. Is it hard to adjust the down pipe?
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