Terrible Rattle after Deleted

[bmborum]

I have a 12 3500. Did all the deletes using Sinister kits. Also installed a 5" Flo Pro TBE at the same time.

First 3-4 days perfect. Ran fine, no codes, no nothing. About 5 days in a develop the most faint rattle ONLY at idle. Raise the RPM 20-50 and it stops. It's coming from center dash in the engine compartment to just behind the glove box.

Trying to be proactive and thinking about it it tells me something is loose. Crawled underneath and nothing is rubbing. Tightened all the exhaust clamps, tightened the turbo clamp, nothing. Let it idle and opened the hood and the EGR bracket was vibrating at about the same frequency as the rattle. Tightened everything down; climbed in to reinspect.....still rattling.

When i high idle the noise stops and the bracket doesn't vibrate.....

The noise is subtle but obnoxious as hell....like something rattling in the cup holder but behind the dash under the hood.....only at idle....

anyone have any ideas? Similar expierence?

 

[NIsaacs]

I had one of those rattle/buzz sounds that I couldn't find and was sure it was in the dash area. I found it by accident one day when I moved some junk on the seat, it was the passenger side seat belt release button.

Nick

 

[Tinman]

Make sure the exhaust itself isn't making contact with something. When I put the Banks exhaust on my 01 it was too close to the transmission cross member and would do the same thing at certain times, such as turning in one direction - frame flex was make exhaust closer to frame and rattle.

 

[bmborum]

Thanks for the advice...

ive taken everything out of the dash and doors just to make sure that wasn't it...

its a muffled sound so its under the hood; I checked the exhaust....not making contact. I can hear it in the cab muffled.....but of course with the hood open you can specifically hear it....then as soon as you raise the rpms it goes away....

frustrating.....and annoying

 

[tp0d]

What programmer are you using for your delete? Has it changed the timing? Could be a timing rattle/valve thing... Couldnt hurt to try changing the timing a bit

-j

 

[bmborum]

Good point.

Using a Raceme Ultra

The timing is advanced one click to I think it's like 24 or 26 degrees...

just odd it would take a week but who knows. Would going backwards or farther forward help?

 

[Mikey-KE7LBB]

just odd it would take a week but who knows.

The weather is getting colder and the the expansion rates of metals is much greater as well... Double check all exhaust connections. Also inspect motor mounts and cab mounts while you're under there.

Squeaks and rattles drive me crazy! I drive a 2011 Kenworth at work. It is an oilfield truck that has spent close to 100,000 miles on dirt roads and has been abused by several people over the years. It has taken me almost a month to eliminated almost all of them, but a new one showed up last night!! I feel your pain!!

Nothing is more frustrating than trying to find the source. Look at the simple things first! After that, it's a guessing game.

 

[tp0d]

Good point.

Using a Raceme Ultra

The timing is advanced one click to I think it's like 24 or 26 degrees...

just odd it would take a week but who knows. Would going backwards or farther forward help?

well prob go closer to stock, but if you're adding HP, that may or may not do anything... i`m not the expert here tho forsure

-j