My 2003 Dodge 3500 started making a strange noise (sort of like air leaking) from the engine when I accelerate. If I put it into neutral and give it gas the noise isn't there, it only happens in gear. The noise gets louder the faster I go and if I let off the gas it goes away. It probably isn't air, its just the best way to describe the sound. Any ideas?

 

Could be that turbo pluming is leaking , try having someone hit the throdle while you look under , over , for the sound , you may hear it in nutrual , with your head under the hood .

 

have you check your intercooler boots? that is a common cause for your air sound.

do you have more smoke than normal?

 

This happened to me I was missing a bolt out of my turbo but that was on a ford.

 

Looking into it more closely, I found that my "Filter Minder" wasn't reading correctly so when I checked my air cleaner myself (trusted that the dealer had checked it when I changed oil - won't trust anymore), my filter was completely clogged and had caused an air line to blow itself out of the Turbo... just needed to re-insert the hose, and replace the air filter, so since I was at it I went ahead and replaced the fuel filter as well... Thanks for the suggestions!

 

Chek your line pre turbo and post, did you put a different air filter on? MAke sure there are no leaks pre filter or you may dust your engine.

 

No leaks post filter. Pre filter is the dirty incoming air.

 

if the dealer has been doing your service i think i would get this documenter in case you have a dirt ingestion problem gown the road.
Clark

 

iam going trough that now also mines an auto i dont know bout yours but mine will do it really bad when you get one it and it will not do it when it gets in 3rd gear and also the truck will leave a little cloud of black smoke all the time at stop lights and all and my fuel mpg will vary from 13 to 16.i wish i could give you some advice but iam trying to find out myself.